If the light ray hits the first mirror and continues to bounce off the other mirrors inside the box, determine where the light ray will eventually hit on the border

Answer:

5.2 s

Explanation:

From the question given above, the following data were obtained:

Velocity = 7.5 m/s

Displacement = 39 m up

Time =?

The time taken for the cable cab to get to 39 m can be obtained as follow:

Velocity = Displacement / Time

7.5 = 39 / time

Cross multiply

7.5 × time = 39

Divide both side by 7.5

Time = 39 / 7.5

Time = 5.2 s

Thus, the time taken for the cable cab to get to 39 m up is 5.2 s

Answer:

Explanation:

The frequency equation is

[tex]f=\frac{v}{\lambda}[/tex] where f is frequency measured in Hz, v is velocity of sound measured in m/s and [tex]\lambda[/tex] is wavelength measured in meters. Filling in our given info:

[tex]512=\frac{340}{\lambda}[/tex] and

[tex]\lambda=\frac{340}{512}[/tex] so

[tex]\lambda=.664 m[/tex] (That is the incorrect number of sig dig's by the way. It should only be 2 since the number 340 only has 2 sig dig's)

Answer: C. The material

Explanation:

In order to check whether a material conducts electricity, the first thing to do would be to design a circuit. Connect a positive wire to the batteries and then another wire from the battery to the bulb and then a wire from the bulb as well.

Then bring different materials to test for conductivity by connecting the wires to the material. If the bulb lights then it is a conductor and if it doesn't the material is not a conductor. The material is therefore the changing variable.

Answer:

Explanation:

Kinematic equation: Final velocity^2 = Initial velocity^2 + 2*acceleration*displacement

As the ball is dropped from rest, initial velocity = 0.

Acceleration = gravity = 9.8m/s^2

Displacement = 7m

So velocity just before it hits ground

= sqrt( 2*9.8*7)

= 11.71m/s

Answer:

2Ω

Explanation:

If a 18Ω resistance is cut into three equal parts each of the resistance will be 18Ω/3 = 6Ω

Equivalent ratio in parallel is expressed as:

1/R = 1/6 + 1/6 + 1/6

1/R = 3/6

Cross multiply

3R = 6

R = 6/3

R = 2Ω

Hence the required equivalent resistance is 2Ω

Answer:

Note that:

Particles in a:

gas are well separated with no regular arrangement.

liquid are close together with no regular arrangement.

solid are tightly packed, usually in a regular pattern.

Explanation:

Answer:

F = 124 N

Explanation:

Given that,

The mass of bicycle and the rider, m = 12 kg + 50 kg = 62 kg

Acceleration of system, a = 2 m/s²

We need to find the force required to accelerate the system. We know that,

Net force, F = ma

Put all the values,

F = 62 kg × 2 m/s²

F = 124 N

So, the required force is equal to 124 N.

Answer:

a. 86.80 m

b. i. The mass of the bob

ii. The length of the pendulum

Explanation:

a. Determine the height of the smokestack.

Using T = 2π√(L/g) where T = period of pendulum = 18.7 s, L = length of pendulum = height of smokestack and g = acceleration due to gravity = 9.8 m/s².

So, making L subject of the formula, we have

T = 2π√(L/g)

T/2π = √(L/g)

squaring both sides, we have

(T/2π)² = L/g

L = (T/2π)²g

Substituting the values of the variables into the equation, we have

L = (T/2π)²g

L = (18.7 s/2π)²(9.8 m/s²)

L = (2.976 s)²(9.8 m/s²)

L = 8.857 s² × 9.8 m/s²

L = 86.796 m

L ≅ 86.80 m

b. What factors influence the period of a simple pendulum

The factors that influence the period of a simple pendulum are

i. The mass of the bob

ii. The length of the pendulum

If the charge on A increases, the force on BOTH objects will increase.

The electric force between two charges is always equal in both directions, just like the gravitational force between two masses.

So I guess choice-B  and choice-D  are both correct.  

Answer:

D. The electric force between A and B will increase.​

Explanation:

Answer:

I completely agree with the first person's response.

Explanation:

They deserve Brainliest. Have a great summer.

Answer:

SO

Explanation:

SI

Answer:

Explanation:

dynamic equilibrium

Answer:

Notice that for all substances, the heat of vaporization is substantially higher than the heat of fusion. Much more energy is required to change the state from a liquid to a gas than from a solid to a liquid.

Gaseous water would require the most heat to produce a temperature change.

Intermolecular force is defined as the force of attraction existing between the neighboring molecules in a container that holds the together.

Here,

Evaporation is the process of conversion of liquid water into gaseous water vapor.

Condensation is the process of conversion of gaseous water vapor into liquid water.

Condensation occurs under higher temperature than that of evaporation. Condensation requires more temperature because the energy for separating the molecules in the gaseous state is comparatively higher. In order to convert the gaseous state into liquid state, it requires a greater intermolecular forces so that the gaseous molecules are brought more closer. The intermolecular force needed for the process of evaporation is lesser when compared to condensation. So, the heat required in evaporation is comparatively less.

Hence,

Gaseous water would require the most heat to produce a temperature change.

To learn more about intermolecular forces, click:

https://brainly.com/question/9007693

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Answer:

The electromotive force is the voltage measured across the cell terminals when "NO" current is being drawn. That is why electromotive forces are used in Wheatstone Bridges which measure the resistance of an external object.

Just measuring the voltage across a cell does not give one the true EMF because current drawn from the cell will cause a reduction of voltage of I * R where R is the internal resistance of the cell.

Answer:

Los generadores eléctricos funcionan según el principio de inducción electromagnética. Una bobina conductora (una bobina de cobre enrollada firmemente sobre un núcleo de metal) se hace girar rápidamente entre los polos de un imán tipo herradura. La bobina conductora junto con su núcleo se conoce como armadura.

Answer:

hi i only dont understand want ur saying

Answer:

V is changing

[tex]as \: skater \: moves : \: there \: is \: displacement \\ from \: third \: equation \: of \: motion \\ {v}^{2} = {u}^{2} + 2as \\ {( \delta \: V})^{2} = 2as \\ V \: \alpha \: s[/tex]

Answer:

females

Explanation:

The ova(egg) starts meiosis as a foetus but doesn't complete it until puberty. This is when the menstrual cycle will start to occur indicating the gametes( egg) is maturing and if not fertilized will be removed.

Answer:

The Train Stopped For 3 Seconds

Explanation:

Just did quiz on edg its right

According to the question, the train stopped for 3 seconds. So the correct option is D.

The one-dimensional plots or graphs are constructed from a position line. It is a horizontal line, along which the position of an object can be indicated, while also indicating its acceleration and velocity.

Arrows are used for marking acceleration and velocity and the direction of these arrows marks the direction of the acceleration or the velocity. The size of the arrow is used to represent the magnitude of the velocity or the acceleration.

Thus, to observe the position, acceleration and velocity of an object in motion, a motion map is used.

Velocity and acceleration vector quantities have magnitude as well as direction. Velocity and acceleration are functions of displacement which is the distance covered in a particular direction. Unlike speed which is a function of distance. Distance just measures the distance covered.

Therefore, according to the question, the correct option is D.

Read more about motion maps, here

https://brainly.com/question/13987788

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Answer:

Explanation:

The frequency is 16.0 Hz. That means that 16 of these waves can pass a single point in 1 second. We are given frequency and wavelength. The equation that relates them is

[tex]f=\frac{v}{\lambda}[/tex] where f is frequency, v is velocity, and λ is wavelength. Putting all this together:

[tex]16.0=\frac{v}{97.5}[/tex] and solving for velocity,

v = 16.0(97.5) so

v = 1560 m/s. This wave can travel 1560 meters in a single second!!! Now that we know this velocity, we can use it in a proportion to find our unknown, which is how long, t, it will take to hear this sound 11000m away. (11 km is 11000m):

[tex]\frac{1560m}{1s}=\frac{11000}{t}[/tex] and cross multiply to get

1560t = 11000 so

t = 7.1 seconds

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Answer:

The weight of the person decreases.

Explanation:

Weight of person at sea level = 700 N

height = 10000m

We know that the weight is given by product of mass and the acceleration due to gravity.

The acceleration due to gravity at height is given by

[tex]g' =g\times \left ( \frac{R}{R+h} \right )^2[/tex]

Where, R is the radius of earth and h is the height.

Now, as we go on heights , the acceleration due to gravity decreases, so the weight also decreases as we go on heights.

Answer:

El trabajo realizado por la niña es 25.9 J.

Explanation:

El trabajo ue hace la niña viene dado por:

[tex] W = |F|*|d|*cos(\theta) [/tex]    

En donde:

F: es la fuerza realizada = 10 N

d: es el desplazamiento = 300 cm

θ: es el ángulo entre la fuerza y el desplazamiento = 30°

Entonces, el trabajo es:

[tex] W = |F|*|d|*cos(\theta) = 10 N*3 m*cos(30) = 25.9 J [/tex]    

Por lo tanto, el trabajo realizado por la niña es 25.9 J.

Espero que te sea de utilidad!        

Answer:

The correct answers are -

1. b. pump the brake pedal rapidly

2. d. all of the above

3. c. your power brakes and power steering won't work very well

4. a. gasoline

5. b. power-assist failure

Explanation:

Brakes help in stopping the vehicle by causing resistance to wheels. IF brake failure it is advised to pump the breaks rapidly in order to cause resistance. Engine failure can be caused by various reasons such as a broken timing gear, no fuel, or getting extremely heated.

In the case of stalling of engine most common effects as power steering not working properly or power brakes not working well. The flooded engine means the engine has too much gasoline that it wont starts.

Answer:

Explanation:

Refer to the pic below that I attached as we talk through these answers.

The amplitude is shown as the height from the top of one wave (called the crest) to the midline. If the whole vertical height from crest to trough is 32 cm, then the amplitude is half of that at

A = 16 cm

The wavelength, or λ, is the horizontal distance from crest to crest or trough to trough. Therefore, our wavelength is 48 cm + 48 cm which is

λ = 96 cm

The speed of the wave is the same thing as the velocity of the wave which can be found in the equation

[tex]f=\frac{v}{\lambda}[/tex] where f is the frequency of the wave and lambda is the wavelength. Filling in:

[tex]2.4=\frac{v}{96}[/tex] and

2.4(96) = v so

v = 230 m/s to the correct number of sig fig's

Answer:

69.2 Nm

Explanation:

Since torque, τ = Fd where F = force and d = distance of force from center of wheel.

The torque due to the clockwise force F' = 43.2 N at a distance d' = radius of wheel = 2.42 m (since it is at the end of the wheel) is τ' = F'd' = 43.2 N × 2.42 m = 104.544 Nm. Since this force is counterclockwise, the torque is positive. So, τ' = 104.544 Nm

The torque due to the force F" = 67.8 N at a distance d" = 0.522 m from center of wheel is τ" = F"d" = 67.8 N × 0.522 m = 35.3916 Nm. Since this force is counterclockwise, the torque is negative. So, τ" = -35.3916 Nm

The net torque on the wheel  τ =  τ' +  τ"

= 104.544 Nm + (-35.3916 Nm)

= 104.544 Nm - 35.3916 Nm

= 69.1524 Nm

≅ 69.2 Nm

Answer:

0.2 Hz

Explanation:

Frequency: This can be defined as the number of circles completed by a wave in one seconds. The s.i unit is hertz.

From the question,

If 4 Waves arrives on the shore every 20 seconds,

Then,

x waves will arrives on the shore in one seconds

Solving for x

x = (4×1)/20

x = 0.2 Hz

Hence the frequency of the wave is 0.2 Hz

Explanation:

tan(theta)=(v^2)/(length of string × g)

=(1.4^2)/(0.84 × 9.8m/s )

=1.96/(8.232)

=0.2380952381

theta=arctan(0.2380952381)

=13.4°