Light goes slower through glass than through air
Indicate whether the statement is true or false
T
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A 4.00 kg mass is moving in a circular path with a constant angular velocity of 5.00 rad/sec and with a tangential velocity of 5.00 m/sec. The centripetal force on the mass is
A. 90.0 N. B. 100 N. C. 125 N. D. 169 N. E. 200 N.
Suppose you have a small cart at rest. You have two different objects that you might throw at the cart to get it moving: a 57-g tennis ball and a 57-g lump of sticky clay. Other things being equal, which should you throw at the cart to maximize the cart’s final speed?
A. The tennis ball B. The clay C. It doesn’t matter: both will have the same effect.
Why is a variable star so convenient for measuring distances to very remote objects?
What will be an ideal response?
Above what speed do the Relativistic and the Newtonian expressions for KINETIC ENERGY disagree by more than 1%?
What will be an ideal response?