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2 years ago

10

a car from rest accelerates at 4.5 ms^2 for 6 seconds. what is the distance traveled by the police car.

1 answer:

Sav [38]2 years ago

3 0

The car traveled 3.375 seconds

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What happens when you put a metallic object on a charger while it is chstging?

Ganezh [65]

It gets attracted due to electro magnetizing

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3 years ago

How is the potential difference same in capacitors arranged in parallel combination?

zimovet [89]

Answer:

<h2>Potential difference across capacitors in parallel </h2>

Two or more capacitors are said to be connected in parallel if each one of them is connected across the same two points. In a parallel combination of capacitors potential difference across each capacitor is same but each capacitor will store different charge.

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2 years ago

A piston-cylinder device initially contains 0.3 kg of nitrogen gas at 160 kPa and 140oC. The nitrogen is now expanded isothermal

irakobra [83]

Answer:

<h2>Work done by the gas is given as</h2><h2> $W = 1.72 \times 10^4 J$ </h2>

Explanation:

As we know that the process is isothermal so here work done is given as

$W = nRTln(\frac{P_1}{P_2})$

here we know that

$n = \frac{w}{M}$

$n = \frac{300}{28} = 10.7 moles$

now we have

$W = 10.7 (8.31)(273 + 140) ln(\frac{160}{100})$

so we have

$W = 1.72 \times 10^4 J$

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2 years ago

When a ball is thrown vertically upward, its velocity goes on decreasing. What happens to it

Tems11 [23]

Answer:

it increases I think.........

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2 years ago

A truck on a straight road starts from rest and accelerates at 1.4 m/s 2 until it reaches a speed of 22 m/s. Then the truck trav

Zolol [24]

Answer:

42.11 sec

Explanation:

In first part : The truck start from the rest that is u = 0 m/sec

Acceleration is given as $a=1.4m/sec^2$

It reaches to a velocity of 22 m/sec so v=22 m/sec

Now according to first law of motion $v=u+at$

$22=0+1.4\times t$

$t=15.71sec$

In second part : The truck maintain a constant speed for 22 sec

In third part : The truck takes an additional 4.4 sec for stopping

So total time in which the truck is in motion =15.71+22+4.4=42.11 sec

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3 years ago