The answer is option C) The car experienced negative acceleration with velocity in the positive direction.
T = 3.5 secs
Velocity (v) = g * t = 10 m/s^2 * 3.5 sec = 35 m/s
Answer:
d
Explanation:
First law of thermodynamics
It is also known as energy conservation law.It state that net work in a cyclic process is equal to net heat in that cycle.
From first law
Q=ΔU + W
ΔU = Q - W
ΔU is the change in internal energy of gas.
Q is heat transfer from the system or to the system.
W is the work done by the system or on the system.
If work done on the system then it will be taken as positive and If work done by the system then it will be taken as negative.
If heat taken by system it will taken as positive and If heat rejected by system it will taken as negative.
So Q will be positive if system gains heat and work will be positive if work is done on the system.
Explanation:
is a formation in space which is constituted mostly of helium, dust and other gases in various concentration
Answer:
D) 255pa
Explanation:
pressure= force/area
force = weight
weight= mass* gravitational acceleration
weight= 0.2kg*10m/s²
weight= 2N
area= πr² where r=1/2diameter
r=1/2diameter
r=1/2(10cm)
r=5cm or 0.05m
area= πr². where π 's approximate value is 3.14
area=3.14(0.05m)²
area=3.14 * 0.0025m²
area=0.00785m²
pressure= force/area
pressure=2N/0.00785m²
pressure=255pa approximately
