If Pluto is a dwarf planet, are any other of the eight planets in our solar system at risk of losing their planetary status?

A0.580-kg rock is tied to the end of a string and is swung in a circle with a radius of 0.500 meters. the velocity of the rock is 4.50 m/s. what is the centripetal force acting on the rock? 15.5 n 5.22 n 69.8 n 23.5 n

How can you increase the strength of an electromagnet?

If anyonee has done the momentum lab practical in physics can you give me the answers i am s lostt rnn : (