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3 years ago

If a car increases its velocity from 1m/s to 3.6km/hr in 5 seconds what’s its acceleration

Physics

1 answer:

EleoNora [17]3 years ago

7 0

Answer:

applying 1st eq of motion vf=vi+at here we have to find a=vf-vi/t , a= 1-1/5 , a=0/5 then we got a=0 here(vf value 3.6km/h is converted in standard unit 3.6×1000/3600 so we get vf=1m/s²

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A battery establishes a voltage V on a parallel-plate capacitor. After the battery is disconnected, the distance between the pla

Semmy [17]

Answer:

In the parallel plate capacitor

The capacitance will decrease between the plates.

The voltage will increase between the plates.

Explanation:

When the distance between the plates increase, then the voltage also increases as it varies with the separation of plates. However the capacitance will decrease upon increasing the distance. As the capacitance depends upon the electric field between the plates. Field is stronger when the plates are closer so capacitance increase. Field will be weaker upon increasing the distance and hence the capacitance decreases.

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3 years ago

Beats: A policeman in a stationary car measures the speed of approaching cars by means of an ultrasonic device that emits a soun

e-lub [12.9K]

Answer:

The frequency of the beats is 43.6408 kHz

Explanation:

Given:

f = frequency = 39.6 kHz

vc = speed of the car = 35 m/s

vs = speed of the sound = 343 m/s

Question: What is the frequency of the beats, f' = ?

As the car moves towards the source, the frequency of the beats

$f'=f*(1+\frac{v_{c} }{v_{s} } )=39.6*(1+\frac{35}{343} )=43.6408kHz$

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3 years ago

Everything in or on water pushes some water aside, even if it's just a little bit.

makvit [3.9K]

Answer:

This is called displacement.

Everything in or on water pushes some water aside, even if it’s just a little bit. This is called displacement.

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4 years ago

Read 2 more answers

State what is meant by a gravitational potential at point A is -1·70 × 109 J kg-1.

alex41 [277]

Answer:

The energy stored in a body due to either it's position or change in shape is called gravitational potential energy.

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3 years ago

In a process called pair production, an energetic

vredina [299]

Answer:

(3) mass-energy must be conserved

Explanation:

As we know that gamma rays are mass less and charge less photons which will have sufficient energy.

Now in case of Pair production the gamma photons convert its whole energy into mass by the law of Einstein's mass energy equivalence relation.

As per his relation we can say

$E = \Delta m c^2$

here we will have

[tex]\Delta m[\tex] = mass produced

now we also have to think that here the two particles must have a pair of particles and antiparticles so that the combined mass system will have energy equivalent to the energy of gamma photons and also it must follow the conservation of charge

So here it will form an electron and a positron such that total charge will be zero and the energy will be same as energy of gamma photon.

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4 years ago

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