Answer:
с The handle will turn anticlockwise (to the left).
Explanation:
Answer:
D- Only the 2nd law of thermodynamics
Explanation:
It violates 2nd law because according to 2nd law of thermodynamics, it is impossible that the sole result of a process is is to absorb energy and do equivalent amount of work. so some heat must lose to surrounding which is not specified here. so it violates 2nd law.
so option D is correct
<span>If your options are:
A.Both momentum and kinetic energy are vector quantities.
B.Momentum is a vector quantity and kinetic energy is a scalar quantity.
C.Kinetic energy is a vector quantity and momentum is a scalar quantity.
D.Both momentum and kinetic energy are scalar quantities.
</span>
The answer on the question given is letter B.<span>Momentum is a vector quantity and kinetic energy is a scalar quantity.</span>
Answer:
D. The person's force on the box is as strong as the force of the box on the person, but the frictional force on the person is forward and large while the backward frictional force on the box is small.
Explanation:
When a bag is pulled, then it involves a person’s force on the box meaning there is an opposite force which is equal to the force of the box on the person.
When the box is pulled, there is a forward frictional force on the person which is big when compared to the backward frictional force which is small. This positive difference is responsible for the movement of the box.
Answer:
70 mph in only 168 feet is the largest
Explanation:
In which of those three situations is the magnitude of the car's acceleration the largest? In which of those three situations is the magnitude of the car's acceleration the largest? cornering at 0.85g reaching 60 mph in 5 seconds flat stopping from 70 mph in only 168 feet not enough information to determine
a)
convert miles/hour to ft/seconds
60mph
1 mile=5280ft
1hr=3600secs
= 60 * 5280 / 3600 ft/s
=> acceleration
acceleration is the rate of change in velocity
= [60 * 5280 / 3600] / 5 ft/s^2
= 264/15 ft/s^2
= 264/(15 * 32) g
= 0.55 g
magnitude of acceleration in case 2
= 0.85 g
magnitude of acceleration in case 3
recall from 
u=0
v^2/2s=a
velocity , a=acceleration
s=distance covered
= (70 * 5280 / 3600)^2 / (2 * 168 * 32) g
= 0.98 g
=> largest magnitude of acceleration = 0.98 g in case 3
and smallest magnitude of acceleration = 0.55 g in case 1.
