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The length of the girl's shadow is approximately 9.18 ft. The length of the shadow of a 5.3 ft-tall girl standing on level ground with the sun 30 degrees above the horizon, we can use the shadow length formula:

L = H / tan(a)

where L is the length of the shadow, H is the height of the object (in this case, the girl), and a is the angle to the source of light (in this case, the sun).

we can see that the formula for calculating the length of a shadow is given in. We can also see that the height of the girl is 5.3 ft and the angle to the source of light (the sun) is 30 degrees, as given in.

Plugging these values into the formula, we get:

L = 5.3 / tan(30)

L = 5.3 / 0.5774

L = 9.18 ft (rounded to two decimal places)

Therefore, the length of the girl's shadow is approximately 9.18 ft.

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Answer:

heat

When light hits an object, it either bounces off, and stays as light energy, or it is absorbed by the object. When it is absorbed, it is converted into heat energy, and the object heats up.

Answer:

I would say the smaller object.

Explanation:

In any case, thermal energy can be spread throughout the object easier, and quicker, rather than the bigger object.

For example: You are boiling two pots of water, let's suppose Pot A has twice as much as Pot B:

|--------------------- |              |                            |

|                          |              |----------------------- |

|_____________|              |______________|

Pot A                                 Pot B

If you boil them at both the same time, temperature, and continue that for sometime, your results will be that Pot B will have risen in temperature alot faster than Pot A

The comparison:

Pot A and Pot B's Amount of water - Supposed to be the different size of the objects

Stove/Boiling: Would be if thermal heat were to enter the objects at the same temperatures.

Answer:

v = 100 [km/h]

Explanation:

To solve this problem we must identify that the movement is at constant speed, that is, there is no acceleration, therefore we must use the following expression for Speed, which relates is displacement with time.

v = d/t

where:

v = velocity [km/h]

d = displacement = 70 [km]

t  = time = 0.7 [h]

v = 70/0.7 = 100 [km/h]

The strength of the electric field will be 2.7 x 108 N/C.

The strength of the electric field is the ratio of electric force per unit charge. Its unit is NC⁻¹.

The given data in the problem is;

E is the strength of the electric field =?

d is the distance = 0.020 m

q is the charge= 12 µc =12 ×10⁻⁶C

The electric field strength is given by;

[tex]E = \frac{Kq}{d^2} \\\\E = \frac{9 \times 10^9\times 12 \times 10^{-6}}{(0.020)^2} \\\\E = 2.7 \times 10^8 N/C[/tex]

Hence the strength of the electric field will be 2.7 x 108 N/C.

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Answer B is right or 2.7 × 108 N/C

Explanation:

Answer: 2.8 m/s

Explanation:

Because momentum is conserved, the momentum obtained by the bag matches the momentum lost by the bullet.

The momentum gained by the bag = MV = 2.5V

Loss in momentum of bullet = m(u-v) = 0.035(475 - 275) = 7 kg*m/s

2.5V = 7

V = 7 /2.5 = 2.8 m/s

Therefore, the speed of the bag is 2.8 m/s

Here is your Answer:-

Conduction is how heat transfers through direct contact with objects that are touching. Any time that two objects or substances touch, the hotter object passes heat to the cooler object. (That hot sand passed the heat energy right into my poor feet)!

Answer:

Conduction is the transfer of thermal energy from one object to another through the movement of molecules. Heat flows from one molecule to another because the particles are in direct contact with one another.

Answer:

The relationship between the wave's amplitude and frequency is such that it is inversely proportional to the frequency. The amplitude decreases as the frequency increases. The amplitude increases as the frequency decreases. The higher the energy of a wave, the higher the amplitude. The lower the energy, the lower the amplitude. Energy has no effect on wavelength, speed, or frequency, only the amplitude.

Explanation:

Sound waves and other mechanical waves can move energy through solid objects. Energy can be transferred through matter and space via electromagnetic waves, such as light waves. Thus, option A is correct.

The shifting magnetic and electric fields are what produce electromagnetic waves. They are created by the charged particles' oscillation.

Each type of wave has a drastically different speed as a result of these variations. Mechanical waves move much more slowly than electromagnetic waves, which move at the speed of light.

Mechanical waves are referred to as a periodic disturbance, whereas electromagnetic waves are referred to as a disturbance.

Therefore, electromagnetic and mechanical waves share energy as common characteristics.

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Answer:

Explanation:  mASS = 4 KG

                        G.F = 9 N/KG  

                      SO

                               W = 9 X 4

                                W =  36 N

Answer:

An experiment is conducted in which a cart travels across a horizontal surface and collides with a wall. Data collected from the experiment are used to create the graph of the cart's velocity as a function of time. All frictional forces are considered to be negligible. Which data from the graph should the student use to determine the direction of the net force exerted on the cart and the direction of the change in momentum of the cart from the time intervals of A to B?

Explanation:

As we know that

So

Option C is correct

Dizziness, Headache, Nausea, vomiting, rapid breathing, rapid heart rate, Restlessness and Weakness are the symptoms that shows poisoning of cyanide.

Dizziness, Headache, Nausea and vomiting, Rapid breathing, Rapid heart rate, Restlessness and Weakness are the some of the symptoms of cyanide poisoning. Cynaide is a very dangerous and fast acting poison that leads to death if not treated on time.

So we can conclude that all above are the symptoms caused by cyanide poisoning.

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Answer: I think its B: The loop becomes electromagnetic, which causes the loop to flip and produce mechanical energy.

Explanation:

Answer:

Your age

Explanation:

Explanation:

By Gay-Lussac's law

Pressure is directly proportional to its temperature at given volume.

When the temperature of a system goes up, the pressure also goes up, and vice versa.

Answer:

So, as pressure increases, temperature will increase as well or vice-  versa

Explanation:

The Ideal Gas Equation is PV = nRT, where :-

P = Pressure

V = Volume

n = number of moles

R = Molar Gas Constant

T = Temperature

In this, P ∝ T

=> So, as pressure increases, temperature will increase as well or vice-  versa

Answer:

it is Ice, of course

Explanation:

some text to answer

Answer:

The atoms in the hot bodies have higher kinetic energy than those of the cold bodies. Thus to maintain thermal equilibrium, the atoms of higher kinetic energy tries to move and collide with the atoms of low kinetic energy. Thus heat transfers from a hot body to a cold body.

Explanation:

Explanation:The atoms in the hot bodies have higher kinetic energy than those of the cold bodies. Thus to maintain thermaler kinetic energy tries to move and collide with the atoms of low kinetic energy. Thus heat transfers from a hot body to a cold body.

The change in the kinetic energy is (22000 + 416500sinθ) J

The net force on the car F' = F - f - N where

So, F' = F - f - N

F' = F - f - mgsinθ

Since the car moves at constant velocity, the net force F' = 0

So, F' = F - f - mgsinθ

F - f - mgsinθ = 0

F = f + mgsinθ

From the work-kinetic energy theorem,

The kinetic energy change of the car ΔK equals the work done by force on car, W

ΔK = W = Fd where

ΔK = Fd

= (f + mgsinθ)d

=  fd + mgdsinθ

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

ΔK = fd + mgdsinθ

= 440 N × 25 m + 1700 kg × 9.8 m/s² × 25 m × sinθ

= 22000 Nm + 416500sinθ Nm

= (22000 + 416500sinθ) J

So, the change in the kinetic energy is (22000 + 416500sinθ) J

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Answer:

average value of the resulting force

Explanation:

The average module value of this resulting force is equivalent to 2.0. 10⁵ N.

The impulse of a force can be calculated by the product of the intensity of the force applied by the time interval in which it is applied -

I = F.Δt

Where,

F = Strength in Newtons

Δt = time interval in seconds

I = Impulse in N.s

The impulse of a force is equivalent to the variation of the amount of movement it causes in the body.

I = ΔQ

The amount of movement is a vector quantity that results from the multiplication of the mass of a body by its speed. Its direction and direction are the same as the velocity vector of the body.  

Q = m-V

As the car goes to rest after the application of force, the amount of final movement of the car is equivalent to zero.

I = 0 - mV

F. Δt = - mV

F. 0,1 = - 1000. 20

F = - 20000/0,1

F = 200,000 N

F = 2,0. 10⁵ N

Answer:

keyboard , guitar and violin

Answer:

Explanation:

Rubbing objects together generates static charges. There will be two type of charges: positive and negative. So the answer is (a) 2.

Answer:

2

Explanation:

When you rub two objects one gets positively charged and other gets negatively charged

So

there are two charges

Answer:

Inversely proportional

Explanation:

The amplitude and frequency of a wave have an inverse connection, with the amplitude being inversely proportional to the frequency. As the frequency rises, the amplitude falls. As the frequency decreases, the amplitude increases.

Answer:

periods

Explanation:

The answer is periods i googled it

Answer:

food

Explanation:

Answer:

A. Two small objects hsgsggahahahahahshgsgegwfw

Answer:

correct answer is a

Explanation:

For this exercise we must add the two oscillations

          y_total = y₁ + y₂

          y_total = 5 sin wt + 5 cos wt

          y _total = 5 (sin t wt + cos wt)

the sine and cosine functions are related

          cos (a +90) = cos a cos 90 - sin 90 sin a = - sin a

let's call  

        a= wt

let's substitute

           y_total = 5 (-cos (wt +90) + cos wt)

the cosine function has the same value for +θ and -θ

           cos θ = cos (-θ)

Thus

           y_total = 0

correct answer is a

Hello friend! Hope you find this response helpful! :)

If you apply a force over a given distance - you have done work. Work = Change in Energy. If an object's kinetic energy or gravitational potential energy changes, then work is done. The force can act in the same direction of motion. Or, the force can act against the motion.

Answer:

static electricity and then lightning rod

1. friction

2. Lightning rod/conductor