This chart lists four examples of two objects that are in contact.
Object 1
Object 2
Example 1 Fire
Air
Example 2 A metal at 80°C
A metal at 12°C
Example 3
The cool ocean
The warm air
Example 4
A tool with a lot of thermal
A material with little thermal
energy
energy
Which statement accurately describes the flow of heat in each example?
Heat will flow from Object 1 to Object 2 in examples 2 and 4, and heat will flow from Object 2 to Object 1 in
examples 1 and 3.
Heat will flow from Object 1 to Object 2 in examples 1 and 3, and heat will flow from Object 2 to Object 1 in
examples 2 and 4.
Heat will flow from Object 1 to Object 2 in Example 3, and heat will flow from Object 2 to Object 1 in examples
1, 2, and 4.
O Heat will flow from Object 1 to Object 2 in examples 1, 2, and 4, and heat will flow from Object 2 to Object 1 in
Example 3.

Answer for the first one is 2. The answer for the 3rd one is 8

When performing resistive testing of the biceps femoris in prone, resistance should be applied on the ankle.

The biceps femoris is a two-headed muscle located on the posterior of the thigh, which flexes the leg at the knee joint and extends the thigh at the hip joint. Resistive testing of the biceps femoris in prone position involves the patient laying on their stomach with their knee bent at a 90-degree angle. The examiner then provides resistance to the patient's ankle while they attempt to extend their leg against resistance. The examiner's other hand is on the patient's pelvis to prevent any movement of the pelvis that may occur during the test. It is important to make sure that the patient is in the correct position during the test. Resistance should be applied gradually to make sure the patient can tolerate it. The examiner should also observe the movement of the pelvis and make sure it is stabilized.

The biceps femoris is a two-headed muscle located on the posterior of the thigh. Resistive testing of the biceps femoris in prone position involves the patient laying on their stomach with their knee bent at a 90-degree angle. The resistance should be applied to the ankle during the test, and the examiner should make sure that the patient is in the correct position. The pelvis should be stabilized to prevent any movement during the test.

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The minimum velocity with which he must kick the ball is 22.22 m/s.

The time taken for the ball to travel 11 m height is calculated as follows;

h = V_yt + ¹/₂gt²

where;

h = ¹/₂gt²

t = √(2h/g)

the height traveled by the ball = 10m, since Joe is already 1 m above the ground.

t = √(2 x 10/9.8)

t = 1.43 seconds

The minimum velocity of the ball is calculated as follows;

R = Vₓt

Vₓ = R/t

Vcosθ = R/t

V = R/(tcosθ )

V = (20)/(1.43 x cos51)

V = 22.22 m/s

Thus, the minimum velocity with which he must kick the ball is 22.22 m/s.

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Answer:

i think it's is 30N

Explanation:

i got it right

The ratio of its kinetic energy to its rest energy will be D) 1.7

When a proton is traveling at a velocity of 0.80c, the ratio of its kinetic energy to its rest energy can be calculated using the equation E_k/E_0 = (γ - 1).

Here, γ is the Lorentz factor, which is calculated by γ = 1/√(1 - v^2/c^2). Substituting 0.80 for v and 3x10^8 for c, we get γ = 5.

Therefore, the ratio of kinetic energy to rest energy is 4 (γ - 1), or 4(5 - 1), which is equal to 16. Therefore, the correct answer is D: 1.7.

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Answer:

d = 303.33 m

Explanation:

Given that,

Acceleration of Doc Brown is 2.52 m/s²

The initial speed of Doc Brown is 0 as it was at rest.

Final speed of Doc Brown is 39.1 m/s

We need to find the distance between he and Marty. Let the distance is d. Using equation of motion as follows :

\(v^2-u^2=2ad\\\\\text{Put u = 0}\\\\d=\dfrac{v^2}{2a}\\\\d=\dfrac{(39.1)^2}{2\times 2.52}\\\\d=303.33\ m\)

So, the distance between he and Marty is 303.33 m.

The resultant speed of the person on the cruise ship is 12.62 m/s.

The resultant speed of an object is the single speed which can effectively represent two or more speed of the object.

The magnitude of the resultant speed of the person on a cruise ship is calculated as follows;

Vr² = Va² + Vb²

where;

Substitute the value of the north speed and east speed to determine the resultant speed of the person on the ship.

Vr  =  √Va² + Vb²

Vr = √[(3.9 m/s)² + (12 m/s)² ]

Vr = 12.62 m/s

Thus, for a person on a cruise ship is doing laps on the promenade deck at a speed of 3.9 m/s to the north and the speed of the ship 12 m/s to the east, the resultant speed is 12.62 m/s.

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The complete question is below:

person on a cruise ship is doing laps on the promenade deck. On one portion of the track the person is moving north with a speed of 3.9 ms relative to the ship. The ship moves east with a speed of 12 ms relative to the water. Find the resultant speed of the person

Answer:M=6.48n

Explanation:

M=(0.18)(36)

0.18x36=6.48

M=6.48n

The boolean expression that can be used in a selection statement to cause the elevator to move is "door closed && called To Different Floor".

The boolean expression is made up of two boolean operators that are connected by a logical AND operator. If the elevator is to move, the following two conditions must be met:

The door must be closed the elevator must be called to a floor that is not currently on. The logical AND operator is used to connect these two conditions and form a boolean expression, as follows:

door closed && calledToDifferentFloor

Where door closed and calledToDifferentFloor are boolean variables that represent whether or not the door is closed and whether or not the elevator has been called to a different floor, respectively. The elevator will move if and only if this boolean expression is true. Therefore, it can be used in a selection statement to cause the elevator to move.

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Answer:

i. + 22.5 m ii. 4.0 m

Explanation:

i. Image distance

Using the lens formula

1/u + 1/v = 1/f where f = focal length = + 18.0 m, u = object distance = distance of shark away from lens = + 90.0 m and v = image distance from lens = unknown

So, we find v

1/v = 1/f - 1/u

= 1/+18 - 1/+90

= (5 - 1)/90

= 4/90

v = 90/4

= + 22.5 m

So the image is real and formed 22.5 m away on the other side of the lens.

ii Length of Shark

Using the magnification formula, m = image height/object height = image distance/object distance. image height = 1.0 m where object height = length of shark.

m = image distance/object distance

= v/u

= +22.5/+90

= 0.25

0.25 = image height/object height

So,

object height = image height/0.25

= 1.0 m/0.25

= 4.0 m

So, the length of the shark is 4.0 m

The car will coast for approximately 372.5 meters before starting to roll back down.

The potential energy (PE) of the car is converted to kinetic energy (KE) as it travels up the slope until it runs out of gas. At this point, the KE of the car is given by: KE = (1/2)mv²

where m is the mass of the car and v is its velocity. Since the car is now coasting, there is no additional energy input, so the KE of the car will decrease due to frictional forces. However, we can assume that the change in KE is negligible over the distance the car coasts before it starts to roll back down.

The gravitational potential energy (GPE) of the car at the top of the slope is given by: GPE = mgh

where h is the vertical height of the slope. We can use the angle of the slope (5 degrees) and the distance traveled to calculate h: h = d*sin(5 degrees). Solving for d: d = h/sin(5 degrees)

We can substitute the expression for h and simplify: d = (mgh)/(mg*sin(5 degrees)) m cancels out, and we can substitute the given values: d = (30²*sin(5 degrees))/(2*9.81*sin(5 degrees)). Hence, d simplifies to approximately 372.5 meters.

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Answer A is true. The horizontal component of the velocity stays constant.

When a ball is thrown up at an angle and air resistance is neglected, the horizontal component of velocity stays constant.

The term neglecting air resistance means that there is no air friction that will slow down the object as it travels.

This assumption is often utilized in physics experiments in order to better comprehend a concept.

What happens to the ball when it is thrown up in the air will be calculated.

The ball has an initial velocity with both vertical and horizontal components.

The vertical component of the velocity is directed upward and its value decreases as the ball rises higher. The horizontal component of the velocity remains constant throughout its flight.

Therefore, answer A is true. The horizontal component of the velocity stays constant.

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the bus traveled from all the way back to  in 0.15 hrs then

is the bus's displacement-

Displacement of bus is 3 miles.

Given that

To find

So according the question

We have

                       u = 30 mile/hour.

                      t₁ = 0.1 hour.

                      t₂ = 0.15 hour.

Now, We have to find the total distance travelled by bus

We know that,

         \(velocity = \frac{distance}{time}\)

So,

             \(u = \frac{distance}{t_1}\)

              \(distance d = {u}\times {t_1}\)

              d = 30 × 0.1

              d = 3 miles

The total distance from oprfhs to phs is 3 miles.

This bus firstly travels from oprfhs to phs and come back from phs to oprfhs so the distance travelled by bus will be same i.e 3 miles.

Now, we can say that when bus traveled from phs all the way back to oprfhs in 0.15 hrs then the displacement of the bus is 3 miles.

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Answer:

H + H ------> He + energy. He + He -----> H + H + He.

Explanation:

Hydrogen having one proton and no neutron fuse with hydrogen having one proton and one neutron forming helium atom with the release of photon. After that two helium atoms combine together forming two hydrogen atoms having one proton each whereas one helium atom having two protons and two neutrons present in their nucleus so the end product of this reaction is hydrogen atoms and helium.

Design a numbering system based on 0's and 1's, where each switch represents a binary digit (0 or 1) and combinations of switches represent numbers.

Two questions that need to be known to understand the title:

What defines an electric machine.

How can switches and bulbs be organized to perform mathematical operations like addition.

To design a numbering system based on 0's and 1's:

In a binary numbering system, each switch can represent a binary digit (0 or 1), and the number can be represented by the combination of these digits. For example, if we have four switches, we can represent numbers from 0 to 15 (2^4 - 1).

Adding the numbers 6 and 4 using switches and bulbs:

By representing 6 as 0110 and 4 as 0100 in binary, we can use four switches and bulbs to perform the addition. Each switch represents a binary digit, and the bulbs will display the result of the addition.

Using logical operations and gates to perform addition:

By using logical AND, OR, and XOR gates, we can manipulate the signals from the switches to perform binary addition.

Each gate takes input signals and produces an output based on a specific logical operation. By connecting these gates properly, we can create a circuit that adds the binary numbers and controls the bulbs to indicate the result.

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Answer:

No ! its False

Explanation:

We all know , we dont have lunar eclipse in every 27 days . They do not happen every month because the Earth's orbit around the sun is not in the same plane as the Moon's orbit around the Earth.

Answer:

False

Explanation:

Yes, the moon orbits the Earth every 27 days, actually, it's precisely 27.3, but that does not mean that there is a lunar eclipse every 27 days. A lunar eclipse only happens when the full moon is directly in Earth's shadow. The moon does not pass through Earth's shadow often because of the Earth's axis. Earth only sees a couple of lunar eclipses a year.

Therefore, the magnitude of vector C is 25.

Given:A = 10x - 2yB = 5x + 4yC=2A + BNow we have to calculate the magnitude of vector C.Let's calculate each part of the vector C first;2A = 2(10x-2y) = 20x - 4yB = 5x + 4yC = 2A + B= (20x-4y)+(5x+4y)=25xNow we can calculate the magnitude of vector C by using the formula;|C| = √(Cx²+Cy²+Cz²)Here, we only have two dimensions, so the formula becomes;|C| = √(Cx²+Cy²)|C| = √(25²) = 25. Therefore, the magnitude of vector C is 25.

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When heating this reaction mixture at reflux, the reaction temperature will be maintained approximately at 100C. Thus, C is the correct option.

Heating the chemical reaction for a specific amount of time, while continually cooling the vapour produced back into liquid form, using a condenser is called Reflux. The vapours produced during the reaction above continually undergo condensation, returning to the flask as a condensate.

In general, the temperature of a reflux reaction will depend on the boiling point of the solvent used. If the solvent has a boiling point of 100°C, for example, then the reaction temperature will be maintained at approximately 100°C when the reaction mixture is heated at reflux.

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Two observers in inertial reference frames will always agree on the time an event occurred, the distance between two events, the time interval between the occurrence of two events, the speed of light, and the validity of the laws of physics.

Inertial reference frames are frames of reference that are not accelerating with respect to each other. In such frames, the laws of physics are expected to hold true. Therefore, both observers will agree on the validity of the laws of physics (option f).

The time an event occurred (option a) is independent of the observer's frame of reference. Time is a scalar quantity that can be measured and agreed upon by different observers in inertial frames.

Similarly, the distance between two events (option c) is also independent of the observer's frame of reference. It is a geometric property and remains the same regardless of the frame of reference.

The time interval between the occurrence of two events (option d) is also a relative quantity that can be measured consistently by observers in inertial frames. This is known as proper time and is invariant under Lorentz transformations.

The speed of light (option e) is a fundamental constant in the universe. According to Einstein's theory of relativity, the speed of light in a vacuum is constant for all observers, regardless of their relative motion. This is a key principle in the theory of special relativity.

However, the simultaneity of two events (option b) is not always agreed upon by observers in different inertial frames. The concept of simultaneous events is relative and depends on the observer's frame of reference. Different observers may perceive the events as occurring at different times, leading to a disagreement in simultaneity.

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The isotopes of any element have same number of protons inside them.

Cadmium is a chemical element with the symbol Cd and atomic number 48. It is soft, silvery and white metal.

Given is about Cadmium that it has eight naturally occurring isotopes.

Isotopes are the atoms of the same element which have same number of protons in them but the number of neutrons are different. Isotopes usually have same chemical properties, but they have different physical properties. Their can be stable and unstable isotopes. These unstable isotopes are also called radioisotopes, since they emit radiation. Thus, the isotopes have same number of protons.

Therefore, the isotopes of any element have same number of protons inside them.

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Answer:

31.0 m/s

Explanation:

Given:

\(\vec a=7.0 \ m/s^2\\\\t=4.0 \ s\\\\\vec v_0 = 3.0 \ m/s\)

Find:\(\vec v_f=?? \ m/s\)

\(\boxed{\left\begin{array}{ccc}\text{\underline{The 4 Kinematic Equations:}}\\\\1. \ \vec v_f=\vec v_0+\vec at\\\\2. \ \Delta \vec x=\frac{1}{2}(\vec v_f-\vec v_0)t\\\\3. \ \Delta \vec x=\vec v_0t+\frac{1}{2}\vec at^2\\\\ 4. \ \vec v_f^2=\vec v_0^2+2\vec a \Delta \vec x \end{array}\right}\)

Using the first kinematic equation:

\(\vec v_f=\vec v_0+\vec at\\\\\Longrightarrow \vec v_f=3.0+(7.0)(4.0)\\\\\Longrightarrow \vec v_f=3.0+28.0\\\\\therefore \boxed{\boxed{\vec v_f=31.0 \ m/s}}\)

Thus, the objects final velocity is found.

At 300,000 km/s, radio waves move at the speed of light. At 100 megahertz, a radio wave has a wavelength of 3.0 m.

The space between two successive troughs or peaks of the light wave is referred to as the wavelength of light. The Greek letter lambda (), which stands for it. Consequently, the wavelength is the separation between one wave's crest or trough and the following wave.

An electromagnetic wave's wavelength has no bearing on how quickly it moves. There is no difference in the speed of Wave C versus Wave D. Changes in the characteristics of the medium a wave travels through are the only things that can change its speed.

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Answer:

B. Earth's gravity pulls down on you, and your gravity pulls up on

Earth

Explanation:

AYEPECKS

The velocity of the third piece is mathematically given as

v=0.88m/s

Generally, the equation for conservation is  mathematically given as

\(m u=m_{1} v_{1 \mathrm{x}}+m_{2} v_{2 \mathrm{x}}+m_{1} v_{x}\)

Here, is the mass of the grenade, \(m_{1}, m_{2}, m_{3}\) the masses of the pieces after an explosion, and \(v_{1 \mathrm{x}}, v_{2 \mathrm{x}}\) are velocities of the first and second pieces after the explosion.

\(m u_{1} &=m_{1} v_{1 x}+m_{2} v_{2 \mathrm{x}}+m_{3} v_{x} \\0 &=0+(0.2 \mathrm{~kg})((5 \mathrm{~m} / \mathrm{s})\\v_{x} &=\frac{-0.173 \mathrm{~kg} \cdot \mathrm{m} / \mathrm{s}}{0.3 \mathrm{~kg}} \\&=-0.578 \mathrm{~m} / \mathrm{s}\)

the equation for conservation

\(m u=m_{1} v_{1 y}+m_{2} v_{2 y}+m_{3} v_{y}\)

\(m u_{1} &=m_{1} v_{1 \mathrm{y}}+m_{2} v_{x y}+m_{3} v_{y} \\0 &=(0.10 \mathrm{~kg})(10 \mathrm{~m} / \mathrm{s})+(0.2 \mathrm{~kg})\left((5 \mathrm{~m} / \mathrm{s}) \cos 10^{\circ}\right)+(0.3 \mathrm{~kg}) v_{y} \\v_{y} &=\frac{-1.98 \mathrm{~kg} \cdot \mathrm{m} / \mathrm{s}}{0.3 \mathrm{~kg}} \\&=-0.661 \mathrm{~m} / \mathrm{s}\)

In conclusion, the magnitude of the velocity

\(v=\sqrt{v_{\mathrm{x}}^{2}+v_{\mathrm{y}}^{2}}\)

\(Substitute $-0.578 \mathrm{~m} / \mathrm{s}$ for $v_{\mathrm{s}}$ and $-0.661 \mathrm{~m} / \mathrm{s}$ for $v_{\mathrm{y}}$\)

\(v &=\sqrt{v_{x}^{2}+v_{y}^{2}} \\&=\sqrt{(-0.578 \mathrm{~m} / \mathrm{s})^{2}+(-0.661 \mathrm{~m} / \mathrm{s})^{2}} \\&=0.88 \mathrm{~m} / \mathrm{s}\)

v=0.88m/s

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Answer:

Distance, S = 13m

Explanation:

Given the following data;

Initial velocity, u = 4m/s

Final velocity, v = 9m/s

Time, t = 2 seconds

To find the distance, S;

First of all, we would determine the acceleration of the shark.

Acceleration = (v - u)/t

Acceleration = (9 - 4)/2

Acceleration = 5/2

Acceleration = 2.5m/s²

Now, to find the distance we would use the second equation of motion

S = ut + ½at²

Substituting into the equation, we have

S = 4(2) + ½*2.5*2²

S = 8 + 1.25*4

S = 8 + 5

Distance, S = 13m

Answer:

A coil having 45 loops

Explanation:

The strength of an electromagnet is proportional to the number of loops. So, when we have more loops, we will get mor strength. It means that the coil that will produce a magnetic field with the maximum strenght is a coil having 45 loops because 45 is the greatest number in the list.

If a feeder circuit is installed in parallel using a single flexible metal conduit raceway, only one wire-type equipment grounding conductor is required in the raceway.

According to the electrical code, when a feeder circuit is installed in parallel using a single flexible metal conduit raceway, only one wire-type equipment grounding conductor is needed.

This is because the equipment grounding conductor provides the necessary grounding path for the entire parallel feeder circuit. Since the conductors are installed in parallel, they share the same electrical potential and do not require separate equipment grounding conductors.

Therefore, only one wire-type equipment grounding conductor is required in the raceway for this scenario.

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