No. You always have mass. If you have 0 Volume there is no mass.
Answer:
T= 19.74 N
Explanation:
The tension in the string will be equal to centripetal force on the ball. (Newton's 3rd law, equal acting and reacting forces acts on a body)
T = Fc
Fc = m w ²r
here:
m = 0.25 kg, r = 0.5 m
w = 2 rps = 2 * 2π rad/s ( ∴ 1 revolution = 2π radians )
w = 4π rad/s
Fc = m w ²r = 0.25 * ( 4π )² * 0.5 N
Fc = T = 19.74 N
T= 19.74 N
Answer:
The value of the centripetal forces are same.
Explanation:
Given:
The masses of the cars are same. The radii of the banked paths are same. The weight of an object on the moon is about one sixth of its weight on earth.
The expression for centripetal force is given by,
where, is the mass of the object, is the velocity of the object and is the radius of the path.
The value of the centripetal force depends on the mass of the object, not on its weight.
As both on moon and earth the velocity of the cars and the radii of the paths are same, so the centripetal forces are the same.
Answer:
Explanation:
the higher up on the Main Sequence the star is, the shorter it lives. The smaller main sequence stars have low luminosities and low surface temperatures. These stars take a very long time to fuse hydrogen into helium and will therefore live a very long life.