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4 years ago

If the Velocity of a moving object is doubled what happens to its kinetic energy

1 answer:

7 0

The kinetic energy of a moving object is one half of the product of its mass multiplied by the square of its velocity. It depends on the mass of an object, and itsspeed.

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A person walks 12 meters to the west and then 16 meters back to the east. what is the distance covered and the direction of disp

devlian [24]

The distance is 28 meters and the direction of displacement is East I think

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3 years ago

According to the scientific theory of atoms, which of the following statements

olga_2 [115]

Answer:

gikjjc hgc jmjuyv

Explanation:

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3 years ago

Unless indicated otherwise, assume the speed of sound in air to be v = 344 m/s. A stationary police car emits a sound of frequen

bixtya [17]

Answer:

a) The velocity of the car is 7.02 m/s and the car is approaching to the police car as the frequency of the police car is increasing.

b) The frequency is 1404.08 Hz

Explanation:

If the police car is a stationary source, the frequency is:

$f_{a} =(\frac{v+v_{c} }{v} )f_{s}$ (eq. 1)

fs = frequency of police car = 1200 Hz

fa = frequency of moving car as listener

v = speed of sound of air

vc = speed of moving car

If the police car is a stationary observer, the frequency is:

$f_{L} =f_{a} (\frac{v}{v-v_{c} } )=(\frac{v+v_{c} }{v-v_{c} } )f_{s}$ (eq. 2)

Now,

fL = frequecy police car receives

fs = frequency police car as observer

a) The velocity of car is from eq. 2:

$1250=1200(\frac{v+v_{c} }{v-v_{c} } )\\1250(v-v_{c} )=1200(v+v_{c} )\\v_{c} =\frac{50*344}{2450} =7.02m/s$

b) Substitute eq. 1 in eq. 2:

$f_{L} =(\frac{v+v_{p} }{v-v_{c} } )(\frac{v+v_{c} }{v-v_{p} } )f_{s} =(\frac{344+20}{344-7.02} )(\frac{344+7.02}{344-20} )*1200=1404.08Hz$

7 0

4 years ago

PLZ HURRY GOTTA HAVE IT DONE BEFORE MY MOM GETS HOME SHES 5 MINS AWAY!!!!!!!

Pie

Answer:

The answer is B the products of photosynthesis are the reactants of cellular respiration

3 0

3 years ago

State some important uses of magnet

GarryVolchara [31]

Use of magnet:

Magnets are used in magnetic compass, doorbells, refrigerators.
Magnets are used in dynamos, motors, loudspeakers, microphones etc.
Ceramic magnets are used in computers.
Magnets are used in toys to give a magic effect.

3 0

3 years ago

Read 2 more answers