P = 10^5 - ρ (average)gh
where ρ (average) = average air density between 0 and 5000 m = (1.22+0.74)/2 = 0.98
we know g & h
I get P = 52470 Pa
Posterior refers to an object positioned in the back of something or somebody, whereas if it's in the front, it's called anterior.
Answer:
The value is
Explanation:
From the question we are told that
The mass of the first car is 
the initial speed of the car is 
The mass of the second car is 
The distance move by both cars is s = 1.93 m
Generally from the law of momentum conservation

Here
because the second car is at rest
and
is the final velocity of the the two car
So
=> 
Generally from kinematic equation

here a is the deceleration
So

=> 
Generally the frictional force is equal to the force propelling the car , this can be mathematically represented as

Here F is mathematically represented as

and
So
=>
=>
Answer:
The efficiency of the engine is 59.2%.
Explanation:
We have,
Work done by the gasoline engine is 45 J and the for every 76 J of heat it takes in.
It is required to find the efficiency of the engine. Efficiency of the engine is given by the ratio of work done to the heat taken i. Its formula is given by :

So, the efficiency of the engine is 59.2%.
Answer:
0.5 second
Explanation:
We are given that
Force, F=20 N
Mass, m=5 kg
Change in velocity,=2m/s
We have to find the time taken to change the velocity .
We know that
Force, F=ma
Where
Acceleration, a=Change in velocity/time

Substitute the values


