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Gre4nikov [31]
3 years ago
7

As a rocket rises, its kinetic energy changes. At the time the rocket reaches its highest point, most of the kinetic energy of r

ocket has been
A permanently destroyed.
B stored in bonds between its atoms.
C changed to thermal energy due to friction.
D transformed into gravitational potential energy.
Physics
2 answers:
Ulleksa [173]3 years ago
7 0
<span>D transformed into gravitational potential energy.</span>
postnew [5]3 years ago
6 0

Answer:

D transformed into gravitational potential energy.

Explanation:

Kinetic energy is the energy associated with movement and potential energy is the energy associated with position in a system. Energy, in general, is the ability to do a job.

Both kinetic and potential energy represent the two fundamental types of existing energy. Any other energy is a different version of kinetic or potential energy or a combination of both. For example, mechanical energy is the combination of kinetic and potential energy.

Kinetic energy is the type of energy that is associated with movement. Anything that is moving has kinetic energy. It can be calculated using the formula:

E_k=\frac{1}{2} mv^2

Where:

m=mass\hspace{3}of\hspace{3}the\hspace{3}object\\v=velocity\hspace{3}of\hspace{3}the\hspace{3}object

Potential energy is the type of energy that is associated with the relative position within a system, that is, the position of an object with respect to another.  It can be calculated using the formula:

E_p=mgh

Where:

g=gravitational\hspace{3}acceleration\hspace{3}constant\\m=mass\hspace{3}of\hspace{3}the\hspace{3}object\\h=It\hspace{3}is\hspace{3}the\hspace{3}distance\hspace{3}(height\hspace{3}in \hspace{3}meters) between\hspace{3}the\hspace{3}Earth\hspace{3}and\hspace{3}the\hspace{3}object.

So, at the highest point, the velocity of the rocket would be zero, and the distance respect to the launch point would be maximum. Hence according to the previous equation its kinetic energy would zero and its potential energy would be the highest. in another words the kinetic energy of rocket has been transformed into gravitational potential energy.

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A car's bumper is designed to withstand a 5.04-km/h (1.4-m/s) collision with an immovable object without damage to the body of t
aleksklad [387]

Answer:

3420.39 N

Explanation:

Applying,

Fd = 1/2(mv²-mu²)................. Equation 1

Where F = force on the bumber, d = distance, m = mass of the car, v = final velocity, u = initial velocity.

make F the subject of the equation

F = (mv²-mu²)/2d............... Equation 2

From the question,

Given: m = 890 kg, v = 0 m/s (to rest), u = 1.4 m/s, d = 0.255 m

Substitute these values into equation 2

F = [(890×0²)-(890×1.4²)]/(2×0.255)

F = -1744.4/0.51

F = -3420.39 N

The negative sign denotes that the force in opposite direction to the motion of the car.

5 0
3 years ago
I need help with question 26<br>this is from my physics textbook
Neko [114]

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6 0
4 years ago
If it takes 15 minutes to dry your hair with a 1.200 kW hair drier, how much energy is used in drying your hair?
Elodia [21]
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Read 2 more answers
Organ pipe A, with both ends open, has a fundamental frequency of 360 Hz. The third harmonic of organ pipe B, with one end open,
iragen [17]

Answer:

The length of the pipe A is L_A = 0.4763 m &  the length of the pipe B is L_B = 0.357 m

Explanation:

Fundamental  frequency  = 360 Hz

Velocity = 343 \frac{m}{s}

(a). Length of the pipe is given by

L = \frac{V}{2 f}

Put all the values in above equation we get

L = \frac{343}{2 (360)}

L_A = 0.4763 m

(b). Given that

The third harmonic of organ pipe B = the second harmonic of pipe A

\frac{n_B}{4L_B} = \frac{n_A}{2L_A}

Thus

L_B = \frac{2 n_{B} L_A }{4n_A}

Put all the values in above formula we get

L_B = \frac{2 (3)(0.4763) }{4(2)}

L_B = 0.357 m

Therefore the length of the pipe A is L_A = 0.4763 m &  the length of the pipe B is L_B = 0.357 m

3 0
3 years ago
How are step-up transformers used in the transmission of electrical energy
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5 0
4 years ago
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