You run around neyland stadium. when you are halfway around the stadium, which value cannot be 0?
a) instantaneous speed
b) average speed
c) instantaneous acceleration
d) average acceleration
Answers
When you are halfway around the stadium, average speed value cannot be 0.
Average speed = Total distance travelled / Time taken.
Since you ran halfway across the stadium, a certain amount of distance has been covered. The only way the average speed can be zero is if you remained stationary over a given interval of time.
In a distance-time graph, at the halfway point in the stadium, slope is equal to zero. So, Instantaneous speed is zero. In a Velocity-time graph, at the halfway point in the stadium, slope is equal to zero. So, Instantaneous acceleration is zero. In a Velocity ( w.r.t. time )-time graph, at the halfway point in the stadium, slope is equal to zero. So, Average acceleration is zero.
Therefore, when you are halfway around the stadium, average speed value cannot be 0.
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Related Questions
A concave mirror with a radius of curvature of 23.5 cm is used to form an image of an arrow that is 28.5 cm away from the mirror. If the arrow is 2.15 cm tall and inverted (pointing below the optical axis), what is the height of the arrow's image?
Answers
Answer:
Explanation:
To find the height of the arrow's image formed by a concave mirror, we can use the mirror equation:
1/f = 1/v - 1/u
Where:
f is the focal length of the mirror (half the radius of curvature),
v is the image distance (distance of the image from the mirror),
u is the object distance (distance of the object from the mirror).
Given:
Radius of curvature (R) = 23.5 cm
Object distance (u) = 28.5 cm
Height of the arrow (h) = 2.15 cm
First, let's find the focal length (f) using the radius of curvature:
f = R / 2
f = 23.5 / 2
f = 11.75 cm
Next, we can use the mirror equation to find the image distance (v):
1/f = 1/v - 1/u
1/11.75 = 1/v - 1/28.5
Solving this equation will give us the value of v:
1/v = 1/11.75 + 1/28.5
1/v ≈ 0.0851
v ≈ 11.75 cm
Now, we can calculate the magnification (M) using the formula:
M = -v / u
M = -11.75 / 28.5
M ≈ -0.411
The negative sign indicates that the image is inverted.
Finally, we can find the height of the image (h') using the magnification:
h' = M * h
h' ≈ (-0.411) * 2.15
h' ≈ -0.884 cm
The negative sign indicates that the image is inverted, just like the arrow.
Therefore, the height of the arrow's image formed by the concave mirror is approximately 0.884 cm.
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3. a) Your body is made up of several simple machines that help you move. Identify three
parts of your body that act as simple machines. Identify the kind of machine for each one
and explain what it does.
Answers
Answer:
Explained below
Explanation:
1) The human arm: This is a type of simple machine called "Lever". In this type of machine, the elbow acts as the fulcrum, the palm serves as the load because that's where we place the load we want to carry. While the inner part of the arm which is the inner part of the elbow represents the effort because that is the joint we mover when making use of our arms.
2) Pulleys: An example of this in the human body is the knee cap where the direction of an applied force is changed. Thus means as it is in motion, it alters the direction for which the quadriceps tendon pulls on the tibia.
3) wheel and axle: An example of this in the human body is the lateral rotation of the shoulder joint medial. The humerus which is the bone between the shoulder and elbow will act as the axle while the rotator will be the will because when it is rotated a little bit, the humerus will move along with it.
A 2400W electric toaster is connected to a standard 120 V wall outlet. A family
measured their monthly toaster usage to be 6.5 hrs.
1) How much electrical energy (in kilowatt hours - kWh) did the toaster dissipate
during the measured month? (round to 1 decimal place & do not include units)
2) If the local power company charges $0.13/ kWh, then calculate (in $) the monthly
total cost of this toaster. (round to 2 decimals & do not include units)
Answers
Answer:
1) energy = 15.6 kWh, 2) total_cost = $ 2.03
Explanation:
1) The energy dissipated is the product of the power and the time of use In a month it was used t = 6.5 h and the power of the toaster is
P = 2400 W = 2,400 kW
energy = P t
energy = 2,400 6.5
energy = 15.6 kWh
using rounding to a decimal
energy = 15.6 kWh
2) The cost of energy is unit_cost = $ 0.13 / kWh
so the total cost
total_cost = energy unit_cost
total_cost = 15.6 0.13
total_cost = $ 2.028
rounding to two decimal places
total_cost = $ 2.03
When a 15.00 kg mass is attached to a vertical spring, the spring is stretched 2.0 m such that the mass is 6.0 m above the table. The spring constant is 400.0N/m? What is the total potential energy associated with this system?
Answers
Answer:
idk
Explanation:
idk
What is the differece between force and motion?
Answers
Answer:
---
Explanation:
Force is like the amount of push
Motion is the result of Push
Determine the required radius for the Sun to become a Black Hole. Write the name for the radius
Answers
Given:
The mass of the sun is
\(M_{sun}=1.989\times10^{30}\text{ kg}\)The universal gravitational constant is
\(G\text{ = 6.67}\times10^{-11}\text{ Nm}^2\text{ /kg}^2\)The speed is
\(c=\text{ 3}\times10^8\text{ m/s}\)To find the required radius for the sun to become a black hole.
Explanation:
The radius can be calculated as
\(\begin{gathered} r=\frac{2GM}{c^2} \\ =\frac{2\times6.67\times10^{-11}\times1.989\times10^{30}}{(3\times10^8)^2} \\ =2948\text{ m} \end{gathered}\)The name of the radius is Schwarzschild radius.
PLEASR HELP!! Warm air rises. The diagram shows that clouds form as the:
A) dew point increases. B) temperature of the air drops. C) air gets less dense and holds less water. D) air becomes less saturated with increased altitude.
Answers
Answer:
C.) Air gets less dense & holds less water
will be the answer. hope this is helpful ^_^
Convection takes place because
Answers
Explanation:
the particles in liquids and gases move faster when they are heated than they do when they are cold. As a result, the particles take up more volume.
which dynamic longitudinal stability mode is characterized by almost constant speed and flight path angle but relatively high frequency oscillations in angle of attack?
Answers
The dynamic longitudinal stability mode characterized by almost constant speed and flight path angle but relatively high frequency oscillations in angle of attack is the phugoid mode.
What is Fequency?
Frequency is a measure of how many cycles of a repeating event occur per unit of time. It is often represented by the symbol "f" and measured in Hertz (Hz), which is equivalent to cycles per second.
The phugoid mode is a type of dynamic longitudinal stability mode that occurs when an aircraft is disturbed from its equilibrium state, causing it to oscillate in pitch. This mode is characterized by almost constant speed and flight path angle but relatively high frequency oscillations in angle of attack. The phugoid mode has a long period and is often described as a "breathing" motion of the aircraft.
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The initial temperature of 150 g of ethanol was 22 C. What will be the final temperature of the ethanol if 3240 J was needed to raise the temperature of the ethanol
Answers
Answer:
30.405°CExplanation:
Using the formula for heart capacity;
Q = mcΔt
m is the mass = 150g = 0.15kg
initial temperature = 22°C
Quantity of heat = 3240J = 3.24kJ
specific heat capacity of ethanol = 2.57 [kJ/kg K]
Substitute and get the final temperature
3.240 = 0.15(2.57)(T - 22)
3.240 = 0.3855(T-22)
3.240/0.3855 = T - 22
8.405 = T - 22
T = 22+8.405
T = 30.405°C
Hence the final temperature of the ethanol if 3240 J was needed to raise the temperature of the ethanol is 30.405°C
(a) What value of ni is associated with the 94.96-nm spectral line in the Lyman series of hydrogen? (b) What If? Could this wavelength be associated with the Paschen series? (c) Could this wavelength be associated with the Balmer series?
Answers
(a) The value of ni associated with the 94.96-nm spectral line in the Lyman series of hydrogen can be determined using the Rydberg formula:
1/λ = R(1/nf^2 - 1/ni^2)
Where λ is the wavelength of the spectral line, R is the Rydberg constant, nf is the final energy level, and ni is the initial energy level. Solving for ni, we get:
ni = sqrt((1/nf^2 - 1/(λR))^(-1))
Plugging in the values for λ and nf (nf = 1 for the Lyman series), and using the known value of R for hydrogen, we get:
ni = 6
Therefore, the spectral line at 94.96 nm in the Lyman series of hydrogen corresponds to a transition from the 7th energy level (ni = 6) to the ground state (nf = 1).
(b) No, this wavelength cannot be associated with the Paschen series of hydrogen. The Paschen series corresponds to transitions between energy levels where nf = 3 and higher, whereas the Lyman series corresponds to transitions where nf = 1.
(c) No, this wavelength cannot be associated with the Balmer series of hydrogen either. The Balmer series corresponds to transitions between energy levels where nf = 2 and higher, whereas the Lyman series corresponds to transitions where nf = 1.
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SOMEONE HELP I BEG IM SO DESPERATE!!
Answers
Answer:
1.Vector are quantities which have both magnitude and direction
Scalar are physical quantities which only have magnitude
Distance is Scalar
Displacement is Vector
2. Scalar
3. Vector
Distance: The total length covered by a moving object irrespective of the direction of motion(only magnitude and no direction)
Displacement: The distance measured in a straight line(linear distance) and in a specific direction (both magnitude and direction)
the 4th & 5th question im unsure, i apologize about it
Calculate the orbital period of a satellite circling the Earth at an altitude of 3500 km. Answer to the nearest minute. Show your work.
Answers
The orbital period of the satellite circling the Earth at an altitude of 3500 km is 163 minutes
How do i determine the orbital period?The orbital period for the satellite circling the Earth at an altitude of 3500 km can be obtained as follow:
Altitude = 3500 kmRadius of earth = 6400 KmSemi-major axis (a) = Radius + Altitude = 6400 + 3500 = 9900 Km = 9900 × 1000 = 9900000 mGravitational constant (G) = 6.67×10¯¹¹ Nm²/Kg²Mass of earth (M) = 5.987×10²⁴ KgOrbital period (T) = ?T² = (4π² / GM) × a³
T² = [(4 × 3.14²) / (6.67×10¯¹¹ × 5.987×10²⁴)] × 9900000³
Take the square root of both sides
T = √[((4 × 3.14²) / (6.67×10¯¹¹ × 5.987×10²⁴)) × 9900000³]
T = 9789.15 s
Divide by 60 to express in minutes
T = 9789.15 / 60
T = 163 minutes
Thus, we can conclude that the orbital period of the satellite is 163 minutes
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what term describes atmospheric conditions that limit the height to which rising air can travel?
Answers
The term that describes atmospheric conditions that limit the height to which rising air can travel is the lapse rate.
It refers to the rate at which temperature changes with altitude in the Earth's atmosphere.
It is described as the decrease in temperature per unit of vertical distance or altitude. Different lapse rates can affect the vertical movement of air.
In certain atmospheric conditions, a stable lapse rate can create a temperature inversion, where the temperature increases with height instead of decreasing.
This inversion layer acts as a barrier, preventing the vertical movement of air and limiting the height to which rising air can travel.
This phenomenon can have implications for weather patterns, air pollution dispersion, and the formation of clouds and precipitation.
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What is the current in a circuit that is powered by a 1.5 Vbattery and connected in series by a 3.0 2 resistor and a5.0 2 resistor?A. 7.5 AB. 12.0 AC. 5.3 AD. 0.19 A
Answers
We will use the formula of the law of Ohm
\(V=RI\)where V is the voltage, R the resistance, I is the current
in our case
V=1.5V
Because the resistors are in serie
R = 3+5= 8 ohms
we substitute the values
\(I=\frac{1.5}{8}=0.1875=0.19A\)therefore the answer is D.
C6H12O6 + 6O2 6CO2+6H2O + energy Which statement correctly compares the reactants and products of the equation?
Answers
The true statement about the equation of respiration is:
The mass of the reactants is the same as the mass of the products; option C.
What is respiration?Respiration is the process by which living organisms break down large molecules such as glucose into smaller molecules such a carbon dioxide and water to release energy in the form of ATP.
Respiration are of two types in living organisms:
Aerobic respiration which requires oxygenanaerobic respiration that does not require oxygenThe equation of aerobic respiration is given below:
C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O + energyIn the given equation above, glucose reacts i the presence of oxygen is broken down into carbon dioxide and water and energy is released.
According to the law of conservation of mass, the mass of reactants is equal to the mass of the products.
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Note that the complete question is given below:
Respiration describes the process that living cells use to release energy by combining sugar and oxygen. The primary chemical changes that happen during respiration are shown in the equation below.
C₆H₁₂O₆ + 6 O₂ → 6 CO₂ + 6 H₂O + energy
Which statement correctly compares the reactants and products of the equation?
Which statement correctly compares the reactants and products of the equation?
A.
The mass of the reactants is less than the mass of the products.
B.
The mass of the reactants is greater than the mass of the products.
C.
The mass of the reactants is the same as the mass of the products.
D.
The number of reactant molecules is greater than the number of products.
Ceres, the largest asteroid in the asteroid belt, has a mass of 9.23 x 1020 kilograms and a radius of 474 kilometers. How much would an astronaut of mass 64.5 kilograms weigh on Ceres? Include units in your answer. Answer must be in 3 significant digits.
Answers
Given data:
* The mass of the Ceres is,
\(M=9.23\times10^{20}\text{ kg}\)* The mass of the astronaut is,
\(m=64.5\text{ kg}\)* The radius of the Ceres is,
\(\begin{gathered} R=474\text{ km} \\ R=474\times10^3\text{ m} \end{gathered}\)Solution:
The gravitational force acting on the astronaut due to the Ceres is,
\(F=\frac{\text{GMm}}{R^2}\)where G is the gravitational force constant,
Substituting the known values,
\(\begin{gathered} F=\frac{6.67\times10^{-11}\times9.23\times10^{20}\times64.5}{(474\times10^3)^2} \\ F=\frac{3970.9\times10^9}{224676\times10^6} \\ F=0.0177\times10^3\text{ N} \\ F=17.7\text{ N} \end{gathered}\)The weight of the astronaut on the Ceres is equal to the gravitational force acting on the astronaut.
Thus, the weight of the astronaut on the Ceres is 17.7 N.
1. The subatomic particle with no electrical charge is the
2. The subatomic particle with a positive charge is the
3. The subatomic particle with a negative charge is the
4. There are the same number of these two particles in an atom
&
5. The atomic number is the same as the number of
Answers
To understand the questions, one should know the structure of an atom.
An atom is made up of some subatomic particles. These particles are positively charged, negatively charged and neutral particles.
The positive and negative charged particles neutralize the atom and the neutral subatomic particles are neutrons.
The answer to the questions are as follows:
1. The subatomic particle with no electrical charge is the "neutron".
2. The subatomic particle with a positive charge is the "proton".
3. The subatomic particle with a negative charge is the "electrons".
4. There are the same number of these two particles in an atom are "electrons" & "protons".
5. The atomic number is the same as the number of "protons" in an atom.
To sum up, an atom has different particles such as protons, electrons and neutrons. With protons being the positively charged, electrons are negatively charged and neutrons are neutral. Neutrons and protons are found in the nucleus and the electrons are spread around the nucleus.
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if the open circuit voltage of a circuit containing ideal sources and resistors is measured at 10 , while the current through the short circuit across the circuit is 400 , what would be the power absorbed by a 60 resistor placed across the terminals?
Answers
The power absorbed by a 60 resistor placed across the terminals would be 166.67 mW.
The power absorbed by a 60 ohm resistor placed across the terminals of a circuit containing ideal sources and resistors can be calculated using the formula Power = (Open Circuit Voltage)2 / Resistance. In this case, the open circuit voltage is 10V and the resistance is 60 ohms. Therefore, the power absorbed by the resistor is 102 / 60 = 166.67 mW.
To calculate the open circuit voltage, you first need to find the total current in the circuit. The total current is equal to the current through the short circuit, 400A. Then, using Ohm's law (V = I x R), you can calculate the open circuit voltage by multiplying the total current by the total resistance of the circuit.
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Which of the statements given below is correct? Give reason
to support your statement.
i. In winter the winds flow from the land to the ocean.
ii. In summer the winds flow from the land towards the
ocean
Answers
a clever student, after learning about the theory of relativity, decides to apply his knowledge in order to prolong his life. he decides to spend the rest of his life in a car, traveling around the freeways at 55 miles per hour (89 km/hr). suppose he drives for a period of time during which 70 years pass in his house. how much time will pass in the car?
Answers
The 69.99999999916 years will pass in the car.
How to calculate the the car passing time duration?According to the theory of relativity, time slows down in a reference frame that is moving relative to a stationary observer. This effect is known as time dilation and becomes noticeable at relativistic velocities.
The formula for time delay is: t' = t / gamma
where t is the time interval measured in stationary frames (that is, frames in which the clock is not moving), t' is the time interval measured in frames moving relative to the clock, and gamma (symbol γ) is: Lorenz coefficient as a function of relative velocity between two frames.
In this case, the student is traveling at 55 miles per hour (approximately 0.0245% the speed of light). The Lorenz coefficient can be calculated as
Gamma = 1 / square (1 - v^2/c^2) = 1 / square (1 - 0.000245^2) = 1.000000000012
So every time he passes 1 second in the student's car, he passes 1.000000000012 seconds in the rest of the frame (i.e. the student's house). So to find out how much time goes by in 70 years for the rest of the car's system, we can multiply 70 years by the inverse of the Lorenz coefficient.
t' = t / gamma = 70 years / 1.000000000012 = 70 years * 0.999999999988 = 69.99999999916 years
His 70-year car elapsed time on the rest system is about 69.99999999916 years. This means that students will have to devote slightly less time than those who are at home for the same period.
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a roller coaster of mass 2000kg is rolling down a track with an instantaneous speed of 10m/s
Answers
The given is:Mass – 2000 kg
The given is:Mass – 2000 kgInstantaneous speed – 10 meter per second
Step: 1Step: 1K.E= 1/2mv^2
Where, K.E – Kinetic energy in joules:
m – Mass in kg
v – Velocity or speed in meter per second
Step: 2From the give,
m = 2000 kg
v = 10 m/s
Equation (1) becomes,
K.E= 1/2 (2000) (10)^2
= (0.5)(2000)(100)
= 100000
K.E = 100,000 Joules
The kinetic energy is 100,000 Joules, if a roller coaster of mass 2000 kg is rolling down a track with an instantaneous speed 10 m/s.
There is a bell at the top of a tower that is 95 m high. The mass of the bell is 21 kg. What is the potential energy of the bell?
Answers
Answer:
19,551 J!
Explanation:
The formula is PE = ham (h=height, a= acceleration or 9.8, m= mass)
PE = (95)(9.8)(21)
PE = 19,551 Joules
Ingrid live in a cold country that ometime get lot of now. When that happen , people can enjoy the port of kiing. Ingrid goe outide to ee if the now i fit for kiing. She ink into the now , but when he put her ki in,he can move over the now without kiing. Why?
Answers
She puts her skis in with less pressure because her skis have a larger surface area than her shoes do. Thus, Ingrid doesn't need to ski to travel across the snow.
The pressure on the snow is reduced by the size of the skis. The pressure on the snow is lessened by the larger surface area of skis. This prevents the skis from burying themselves too deeply in the snow.
Pressure is defined as the force perpendicularly applied to an object's surface divided by the area across which it is distributed. Gauge pressure is the pressure in relation to the air pressure outside. To express pressure, various units are employed.
Ingrid can move over the snow without skiing because there is less pressure when she puts her skis on compared to her shoes.
The question is incomplete. The complete question is 'Ingrid lives in a cold country that sometimes gets lots of snow. When that happens , people can enjoy the sport of skiing. Ingrid goes outside to see if the snow is fit for skiing. She sinks into the snow , but when she puts her skis in, she can move over the snow without skiing. Why?'
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A planet is most likely to have tectonic activity if it has:.
Answers
Answer: Heyo Kenji Here! Here's your answer- A planet is most likely to have tectonic activity.
Explanation: Hope this helps!
Have a nice day!
- Kenji ^^
Julissa, Haily
and Johnisha nave a picnic.
An acorn falls from a tree and
lands on Johrțisha's sandwich. What is the law?
Answers
Answer:
Newtons law of gravity I think
SWOT analysis, PESTEL analysis, Porter's Five
Forces Analysis, and Value Chain Analysis on the
company of a company (excluding netflix india, and amazon)
Answers
SWOT Analysis: Apple Inc. has a strong brand image and innovative product portfolio, but faces challenges such as high product prices and intense competition.
PESTEL Analysis: Apple Inc. is influenced by global political stability, economic conditions, changing consumer preferences, rapid technological advancements, environmental sustainability practices, and legal regulations.
Porter's Five Forces Analysis: Apple Inc. faces moderate threats of new entrants and supplier bargaining power, high buyer bargaining power and threats of substitute products, and intense competitive rivalry.
Value Chain Analysis: Apple Inc.'s value chain includes primary activities like logistics, operations, marketing, and support activities such as procurement, technology development, and human resource management.
SWOT Analysis of Apple Inc.:
Strengths: Strong brand image, innovative product portfolio, loyal customer base.Weaknesses: High product prices, dependence on a few key products, and limited customization options.Opportunities: Emerging markets, expansion into new product categories (e.g., wearables), growing demand for smart devices.Threats: Intense competition, rapidly changing technology landscape, legal and regulatory challenges.PESTEL Analysis of Apple Inc.:
Political: Global political stability, taxation policies, intellectual property rights.Economic: Global economic conditions, exchange rates, consumer spending patterns.Sociocultural: Changing consumer preferences, lifestyle trends, environmental consciousness.Technological: Rapid technological advancements, cybersecurity risks, automation.Environmental: Environmental sustainability practices, renewable energy usage.Legal: Intellectual property laws, privacy regulations, antitrust regulations.Porter's Five Forces Analysis of Apple Inc.:
The threat of new entrants: Moderate due to high barriers to entry, and strong brand loyalty.Bargaining power of suppliers: Moderate due to Apple's size and brand power.Bargaining power of buyers: High due to numerous alternative products available.The threat of substitute products: High due to intense competition in the tech industry.Competitive rivalry: Intense competition from companies like Samsung, and Microsoft.Value Chain Analysis of Apple Inc.:
Primary activities: Inbound logistics, operations, outbound logistics, marketing, sales, and after-sales service.Support activities: Procurement, technology development, human resource management, firm infrastructure.Learn more about SWOT analysis at
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5. Chad wants to investigate whether adding a solute to water affects its boiling point and freezing point. He set up an experiment and recorded the boiling and freezing point in degrees Celsius (°C), his results are in the data table.
EFFECT OF SOLUTE ON BOILING AND FREEZING POINTS
Test
A.Water
B.Water + 10 grams of salt
C.Water + 20 grams of salt
D.Water +30 grams of salt
E.Water + 40 grams of salt
Boiling Point (°C)
A.100.0
B.100.5
C.101.0
D.101.5
E.102.0
Freezing Point (°C)
A.0
B.-2
C.-4
D.-6
E.-8
Based on the data, which statement would be the best conclusion?
A. Adding salt to water decreases the boiling point.
B. Adding any solute to water increases the boiling point.
C. Adding salt to water increases the boiling point and decreases the freezing point.
D. Adding any solute to water increases the boiling point and decreases the freezing point.
Answers
Answer:
Explanation:
C. Adding salt to water increases the boiling point and decreases the freezing point.
Which describes the role of the muscular system during physical activity?
Select all that apply.
1: It allows for movement.
2: It controls the breathing rate.
3: It forces venous blood to return to the heart.
4: It controls the heart rate.
Answers
Answer:
1.It allows for movement.
2.t controls the breathing rate.
4. It controls the heart rate.
Explanation:
the behavior of a wildfire is typically described
by:
a) spread and recurrence
b) intensity and spread
c) temperature and location
d) severity and seasonality
e) recurrence and fuel composition
Answers
The behavior of a wildfire is typically described by b) intensity and spread.
Wildfire behavior refers to the way the fire responds to the various factors that influence its spread and movement. The behavior of a wildfire is typically described by two main characteristics, which are intensity and spread. Intensity refers to the heat output of the fire and its potential for ignition and combustion. Spread, on the other hand, is the rate at which the fire is moving and how far it has spread. The intensity of a wildfire is influenced by several factors, including the type of fuel, weather conditions, and topography.
High-intensity wildfires tend to occur in areas with abundant and dry fuel, high temperatures, low humidity, and high winds, they can be dangerous and difficult to control, and they often result in significant damage to the environment and human communities. Spread is influenced by the same factors as intensity, as well as the presence of firebreaks, the availability of resources, and the tactics used by firefighting personnel. The speed and direction of the fire can vary greatly depending on the surrounding conditions, and it is important to monitor and assess these factors in order to manage the fire effectively. So therefore the behavior of a wildfire is typically described by b) intensity and spread.
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