Let's try to do this math ourselves from this point. Notice how the s2 term in the acceleration (5 m/s2) and the s term in the time (7 s) cancel leaving you with m/s (velocity).




122 m/s


244 m/s


8.7 m/s


35 m/s

The wavelength of the third line in the Lyman series, and identify the type of EM radiation

In this series, the spectral lines are obtained when an electron makes a transition from any high energy level (n=2,3,4,5... ). The wavelength of light emitted in this series lies in the ultraviolet region of the electromagnetic spectrum.

1 / lambda = R(h)* ( \(\frac{1}{(n1)^{2} }\) -   \(\frac{1}{(n2)^{2} }\))

                 = 109678 ( \(\frac{1}{1^{2} }\) -  \(\frac{1}{3^{2} }\) )

                 = 109678 (8/9)

   Lambda = 9 / (109678 * 8 )

                  = 102.6 * \(10^{-9}\) m = 102.6 nm

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Answer:

two of them in series with one in parallel

Explanation:

When two or more batteries are connected in

(a) series: the total voltage produced is equal to the sum of the voltages on each of the batteries. For example, if two batteries A and B of 3V and 2V respectively are connected in series, then the total voltage produced is

3V + 2V = 5V

(b) parallel: the total voltage produced is equal to the voltage on any one of the batteries. As a mention, only batteries of the same voltage should be connected together in parallel. For example, if two batteries A and B each of 4V are connected together in parallel, then the total voltage produced is 4V.

If these batteries are not of the same voltage, then the one of larger voltage will charge the one of the lower voltage until they both have the same voltage. That means that their eventual voltage will be the average of their voltages. For example, if two batteries A and B of 3V and 2V respectively, are connected in parallel, their total voltage will be,

(3V + 2V) / 2 =2.5V

Now, from the question.

Since there are three cells each of value 2V.

=>If we connect two of them in series, the total voltage from those two cells will be 2V + 2V = 4V

=>If we then connect this series connection in parallel with the third cell, then we have a parallel combination of 4V and 2V. Since they have different voltages, then the total voltage will be the average of the two voltages. i.e

(4V + 2V) / 2 = 6 / 2 = 3V

Therefore, to have a total of 3V from three cells each of 2V, we need to connect two of them in series with one in parallel

Answer:

option C is correct

Explanation:

given mass=5 kg  

velocity=20 m/s

momentum,P=m v

p=5*20=100 kg m/s

The momentum of the object is 100kg.m/s

HOW TO CALCULATE MOMENTUM:

Momentum (p) = mass (m) × velocity (v)

p = 20m/s × 5kg

p = 100 kg.m/s

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A wave is a disturbance that travels from one point to another in a medium. This disturbance can also be referred to as variation in energy. Light consists of energy derived from oscillating magnetic and electric fields. As light moves, it carries this energy from the source to another location. Also, waves have frequency and wavelength. Given these characteristics of light, we can conclude that

light is a kind of wave

The displacement due to the constant speed and the displacement due to the deceleration gives a total displacement of 238.5 mi.

Displacement is the measurement of how far an object has moved from its initial position. It is commonly expressed in terms of distance and direction, and is often measured in terms of meters or kilometers. Displacement is a vector quantity, meaning it has both magnitude and direction.

The total displacement of the jetliner between touchdown and coming to rest can be calculated by adding the displacement due to the constant speed for 1.1 seconds and the displacement due to the deceleration over the same time period.

The displacement due to the constant speed of 143 mi/h for 1.1 s is found by multiplying the speed (143 mi/h) by the time (1.1 s) to get 159.3 mi.
The displacement due to the deceleration is found by calculating the average speed of the jetliner between touchdown and coming to rest, then multiplying this average speed by the time (1.1 s). The average speed of the jetliner is found by taking the difference between its initial speed (143 mi/h) and its final speed (0 mi/h) and dividing it by 2. This gives an average speed of 71.5 mi/h. Multiplying this average speed by the time (1.1 s) gives a displacement due to deceleration of 79.2 mi.
Adding the displacement due to the constant speed and the displacement due to the deceleration gives a total displacement of 238.5 mi.

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The position of the second dark fringe will be 1.90 mm from the central bright fringe.

Based on the given information, we can use the formula for the fringe spacing in a double-slit experiment:

Fringe spacing (y) = (wavelength × distance from slits to screen) / distance between slits

where:

wavelength = 631 nm = 631 × 10⁻⁹ m

distance from slits to screen = 3.41 m

distance between slits = 1.13 mm = 1.13 × 10⁻³m

Plugging in the values:

y = (631 × 10⁻⁹m × 3.41 m) / (1.13 × 10⁻³m)

y = 0.00190 m (rounded to 5 decimal places)

Now, we can find the position of the first bright fringe from the central bright fringe:

Position of first bright fringe = y

= 0.00190 m

Converting to millimeters:

Position of first bright fringe = 0.00190 m × 1000 mm/m = 1.90 mm

The position of the second dark fringe is also 1.90 mm from the central bright fringe.

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Answer:

they do not function appropriately in the tissue or organ they are a part of.

The statement that is true about cancer cells is They do not function appropriately in the tissue or organ they are a part of. Option C is the correct answer.

Cancer cells differ from normal cells in several ways. One of the key characteristics of cancer cells is that they lose their normal function and behavior within the tissue or organ they originate from. Option C is the correct answer.

Normal cells have specific roles and functions within the body, contributing to the overall health and proper functioning of the tissue or organ they are a part of. In contrast, cancer cells undergo a series of genetic mutations that disrupt their normal function. These mutations can lead to uncontrolled cell growth and division, which is a hallmark of cancer. As a result, cancer cells no longer perform the specialized functions of the tissue or organ they are derived from, and they can interfere with the normal functioning of nearby healthy cells.

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The complete question is, "What is TRUE about cancer cells?

a. They are just like normal cells except for the way they function.

b. They form an encapsulated tumor that keeps them in one area of the body

c. They do not function appropriately in the tissue or organ they are a part of.

d. The mutations in cancer cells are caused by environmental factors."

Answer:

it looks like B on the first one and D on the second hope this helps!!

Explanation:

Answer:

A to B is in constant speed. b to c is speeding up. c to d is not moving. d to e is slowing down.

Explanation:

a to b is at a constant rate of acceleration. (It is speed up but it is doing it consistantly) The line is curving upwards means it is speeding up just not consistantly like a to b. c to d is not going up or down which means it is not in motion. d to e is slowing down because the line curvs down ward.

A to B is at a constant pace. b to c is rushing up. c to d isn't always transferring. d to e is slowing down.

The graph on which the immediate position x of a particle is plotted at the y-axis and the time t at the x-axis is known as the location-Time graph.

The precept is that the slope of the road on a position-time graph exhibits beneficial records about the rate of the object. it's miles frequently stated, "because the slope goes, so is going the rate." anything characteristic the speed has, the slope will exhibit the same.

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Among the given options, the appliance with the lowest typical energy cost is the microwave oven. Typical energy cost refers to the average amount of money spent on energy usage by an appliance or device over a certain period of time.

Microwave ovens use electromagnetic radiation to cook or heat food, and they are generally more energy-efficient compared to other appliances such as dishwashers, washing machines, and refrigerators. This is because microwave ovens use less power and cook food faster than conventional ovens, reducing energy waste and costs. However, it is important to note that the exact energy cost of an appliance can depend on factors such as its age, model, usage, and energy efficiency rating.

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Answer:

B

Explanation:

trust me

b)natural resources that replenish themselves over time

What are renewable resources of energy?

Renewable energy is energy derived from natural sources that are replenished at a higher rate than they are consumed.

For example , Sunlight and wind are such sources that are constantly being replenished. Renewable energy sources are plentiful and all around us.

It is one that can be used repeatedly and does not run out because it is naturally replaced.

Renewable energy sources, such as biomass, geothermal resources, sunlight, water, and wind, are natural resources that can be converted into these types of clean, usable energy: Bioenergy.

Wind energy is also known as renewable source of energy  as The nation's wind supply is abundant and inexhaustible.

Over the past 10 years, U.S. wind power capacity has grown 15% per year, and wind is now the largest source of renewable power in the United States. It's sustainable.

Wind is actually a form of solar energy.

Hence,

natural resources that replenish themselves over time

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Answer:

I = 5[amp]

Explanation:

Electrical power is defined as the product of voltage by current.

\(P=V*I\)

where:

P = power = 1150 [W]

V = voltage = 230 [V]

I = current [amp]

Now replacing:

\(1150=230*I\\I=1150/230\\I=5[amp]\)

A 15 [amp] fuse must be used. Always the fuse must be larger than the operating current, to protect the equipment from very high currents. above 15 [amp]

The sum of the momentums at the beginning and the end of collisions is equal, which is known as "momentum conservation."

In athletics, the term "momentum" is commonly used. It will be challenging to halt a team that is moving forward and gaining momentum. It will be difficult to halt a team that is actually making progress and gathering momentum.

Momentum is a term from physics that refers to how much motion an object has. The sports team with the momentum is the one that is currently competing. If anything is moving or in motion, it has momentum. "Mass in motion" is how momentum is defined. Every object has mass, thus if it's moving, its mass must be in motion, which implies momentum.

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Answer:

thrust

Explanation:

Answer:

thrust

Explanation:

A ball is dropped from a height of 10 m. Its velocity upon impact with the ground is (v) = (a) 14 m/s.

Velocity is a term that means that the object has changed its position by making a distance in a given time. That called the velocity of the object. It can be measured in m/s, cm/s.

To calculate the velocity we are using the formula,

v²-u²=2gh

As we know the ball start velocity from rest so, u=0

v²=2gh

Or, v=√2gh

Here we are given,

h= the height of the cliff from the ball fell. = 10m.

g= The acceleration due to gravity. = 9.8 m/s².

We have to calculate the velocity of the ball = v m/s.

Now we put the values in above equation, we get

v=√2gh

Or, v= √2*9.8*10

Or, v= 14 m/s.

So from this we can say that, Its velocity upon impact with the ground is (v) = (a) 14 m/s

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The conclusion you make about the relative orientation of the mirrors is that multiple images are created by multiple reflections between two flat mirrors.

What are mirrors: The law of reflection helps explain how a mirror is characterized as a reflecting surface.

In conclusion, When two mirrors are parallel to each other, the number of reflecton is infinite.This also depends on your point of view.

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Answer:

d = 100.56 m

Explanation:

It is given that,

Force acting on the dog is 22.4 N

Angle at which the force is applied is 115 º

Work done is - 42.3 J

We need to find the distance covered by the dog. The work done by an object is given by :

\(W=Fd\cos\theta\)

d = distance covered by the dog

\(d=\dfrac{W}{\cos\theta}\\\\d=\dfrac{-42.5}{\cos(115)}\\\\d=100.56\ m\)

So, the dog moves a distance of 100.56 m.

Answer:

4.47 M.

Explanation:

I do Acellus and just got it correct!

Given:

Start position : x = 10 m

Displacement : x = + 15 m

Final position = 10 + 15 = 25 m

The object passes through 10 - 25 .

Answer: NO

It takes 79.4 s for a 1.57-a current to plate 0.1261 g of a metallic element from a solution containing m2 ions.  we need to determine the molar mass (M) and the number of moles of electrons transferred (n) for the metallic element (m). Since we don't have information about the specific element

To determine the metallic element (m) that is being plated from the solution, we need to use Faraday's law of electrolysis. According to Faraday's law, the amount of substance (m) that is deposited or plated on an electrode is directly proportional to the electric charge (Q) passed through the electrolyte. The equation is given by:

m = (Q * M) / (n * F)

where:

m is the mass of the substance plated,

Q is the electric charge,

M is the molar mass of the substance,

n is the number of moles of electrons transferred in the reaction,

F is Faraday's constant.

In this case, the electric charge Q is given by the product of the current (I) and time (t): Q = I * t.

From the information provided, the current is 1.57 A and the time is 79.4 s. Plugging these values into the equation, we have:

Q = (1.57 A) * (79.4 s) = 124.558 C

we cannot determine these values accurately. Therefore, we cannot determine the chemical symbol for the element without additional information about its molar mass and the number of moles of electrons transferred in the reaction.

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Answer:

Below

Explanation:

They are not equivalent. but to find out the mass which weighs Newtons

   divide Newtons by 'g '         Newtons/ (9.81 m/s^2) = KG   (on earth)

Answer:

The thermal efficiency, \(\eta _{reheat}\), of the Rankine cycle with reheat is 36.81%

Explanation:

p₁ = 8 MPa = 80 Bars

T₁ = 450°C = 723.15 K

From steam tables, we have;

v₁ = 0.0381970 m³/kg

h₁ = 3273.23 kJ/kg

s₁ = 6.5577 kJ/(kg·K) = s₂

The p₂ = 0.8 MPa

T₂ = Saturation temperature at 0.8 MPa = 170.414°C = 443.564 K

h₂ = 2768.30 kJ/kg

\(T_{2'}\) = 400°C = 673.15 K

\(h_{2'}\) = at 400°C and 0.8 MPa = 3480.6 kJ/kg

p₃ = 10 kPa = 0.1 Bar

T₃ = Saturation temperature at 10 kPa = 45.805 °C = 318.955 K

h₃ = 2583.89 kJ/kg

h₄ = \(h_{3f}\) = 191.812 kJ/kg

The thermal efficiency, \(\eta _{reheat}\), of a Rankine cycle with reheat is given as follows;

\(\eta _{reheat} = \dfrac{\left (h_{1}-h_{2} \right )+\left (h_{2'}-h_{3} \right )-W_{p}}{h_{1}-\left (h_{4}+W_{p} \right )+\left (h_{2'}-h_{2} \right )}\)

Therefore, we have;

\(\eta _{reheat} = \dfrac{(3273.23 -2768.30 ) + (3480.6 -2583.89 ) - 8.04)}{(3273.23 -(191.812 + 8.04) + (3480.6 -2768.30 ) } = 0.3681\)

Which in percentage is 36.81%.

Answer:

the answers A

Explanation:

Answer:

As rainwater falls, it is naturally soft. However, as water makes its way through the ground and into our waterways, it picks up minerals like chalk, lime and mostly calcium and magnesium and becomes hard water. ... Even hair washed in hard water may feel sticky and look dull.

Explanation:

Answer:

To gradually increase blood flow to the body

Answer:

Once you have drawn the free-body diagram, you can use vector addition to find the net force acting on the object. We will consider three cases as we explore this idea:

Case 1: All forces lie on the same line.

If all of the forces lie on the same line (pointing left and right only, or up and down only, for example), determining the net force is as straightforward as adding the magnitudes of the forces in the positive direction, and subtracting off the magnitudes of the forces in the negative direction. (If two forces are equal and opposite, as is the case with the book resting on the table, the net force = 0)

Example: Consider a 1-kg ball falling due to gravity, experiencing an air resistance force of 5 N. There is a downward force on it due to gravity of 1 kg × 9.8 m/s2 = 9.8 N, and an upward force of 5 N. If we use the convention that up is positive, then the net force is 5 N - 9.8 N = -4.8 N, indicating a net force of 4.8 N in the downward direction.

Case 2: All forces lie on perpendicular axes and add to 0 along one axis.

In this case, due to forces adding to 0 in one direction, we only need to focus on the perpendicular direction when determining the net force. (Though knowledge that the forces in the first direction add to 0 can sometimes give us information about the forces in the perpendicular direction, such as when determining frictional forces in terms of the normal force magnitude.)

Example: A 0.25-kg toy car is pushed across the floor with a 3-N force acting to the right. A 2-N force of friction acts to oppose this motion. Note that gravity also acts downward on this car with a force of 0.25 kg × 9.8 m/s2= 2.45 N, and a normal force acts upward, also with 2.45 N. (How do we know this? Because there is no change in motion in the vertical direction as the car is pushed across the floor, hence the net force in the vertical direction must be 0.) This makes everything simplify to the one-dimensional case because the only forces that don’t cancel out are all along one direction. The net force on the car is then 3 N - 2 N = 1 N to the right.

Case 3: All forces are not confined to a line and do not lie on perpendicular axes.

If we know what direction the acceleration will be in, we will choose a coordinate system where that direction lies on the positive x-axis or the positive y-axis. From there, we break each force vector into x- and y-components. Since motion in one direction is constant, the sum of the forces in that direction must be 0. The forces in the other direction are then the only contributors to the net force and this case has reduced to Case 2.

If we do not know what direction the acceleration will be in, we can choose any Cartesian coordinate system, though it is usually most convenient to choose one in which one or more of the forces lie on an axis. Break each force vector into x- and y-components. Determine the net force in the x direction and the net force in the y direction separately. The result gives the x- and y-coordinates of the net force.

Example: A 0.25-kg car rolls without friction down a 30-degree incline due to gravity.

We will use a coordinate system aligned with the ramp as shown. The free-body diagram consists of gravity acting straight down and the normal force acting perpendicular to the surface.

We must break the gravitational force in to x- and y-components, which gives:

F_{gx} = F_g\sin(\theta)\\ F_{gy} = F_g\cos(\theta)F

gx

​

=F

g

​

sin(θ)

F

gy

​

=F

g

​

cos(θ)

Since motion in the y direction is constant, we know that the net force in the y direction must be 0:

F_N - F_{gy} = 0F

N

​

−F

gy

​

=0

(Note: This equation allows us to determine the magnitude of the normal force.)

In the x direction, the only force is Fgx, hence:

F_{net} = F_{gx} = F_g\sin(\theta) = mg\sin(\theta) = 0.25\times9.8\times\sin(30) = 1.23 \text{ N}F

net

​

=F

gx

​

=F

g

​

sin(θ)=mgsin(θ)=0.25×9.8×sin(30)=1.23 N