Answer: A
Explanation:
the second technician is wrong because ptc coolers are not present in the ac uint in cars they are called ptc heaters
Answer:
The wind is caused by differences in atmospheric pressure.
Explanation:
When a difference in atmospheric pressure exists, air moves from the higher to the lower pressure area, resulting in winds of various speeds. ... Surface friction also causes winds to blow more inward into low-pressure areas.
Answer : correct option is (c) velocity.
Explanation :
When an object is moving with a constant speed in a circular path, it is said to be moving in circular motion.
Speed is defined as distance travelled per unit time. In circular motion object moves with constant speed but it keep on changing its direction i.e. its velocity is constantly changing.
Also in circular motion, the object moves tangentially.
Hence, the velocity of object is constantly changing.
solution:
long to travel 19.6m at 28m/s
t
=19.6/28
=time taken to drop from rest
s=ut+(1/2)at^2
u=0
a=~10
so s=(1/2)*10*(19.6/28)^2 =2.45m
Answer:
Frictional force, F = 45.9 N
Explanation:
It is given that,
Weight of the box, W = 150 N
Acceleration,
The coefficient of static friction between the box and the wagon's surface is 0.6 and the coefficient of kinetic friction is 0.4.
It is mentioned that the box does not move relative to the wagon. The force of friction is equal to the applied force. Let a is the acceleration. So,
Frictional force is given by :
F = 45.9 N
So, the friction force on this box is closest to 45.9 N. Hence, this is the required solution.