Answer:
statement 1
Explanation:
When mass increases,KE increases and when mass decreases, KE also decreases
Answer:
option (a)
Explanation:
In an isothermal process, the temperature of the gas remains constant.
The internal energy of the gas is the function of change in temperature.
As the temperature is constant, so there is no change in the internal energy of the gas.
So, internal energy change is zero.
Power = (work) / (time)
= (120 J) / (2 sec)
= 60 watts .
Answer:
4.62N
Explanation:
Since the motion covers 1 circle (or 2π rad) per 0.8 seconds, its angular velocity is
Radius of the circular motion is r = 75 cm or 0.75m. We can calculate the centripetal acceleration of this mass
From Newton's 2nd law, we calculate the centripetal force, which is also the tension of the string:
Answer:
Twice
Step-by-Step Explanation:
Time between 7:00 PM and 1:00 AM: 6 hours
Distance: 4818km
Since the distance is 4818km, and the time is 6 hours, you divide 4818 by 6.
803.0000015999 km/h.
The average speed is 803 km/h
Which considering the ideal case scenario if the plane starts at 0 reaches the speed of 803 and the end reduces its speed from 803 to 0. This means we have come across the value of 800 at least twice. Hence, the plane was travelling at a speed of 800 km/h at least 2 times.