Amachine that has no friction to overcome is called

a. ideal machine
b. complex machine
c. real machine
d. smooth machine

Which are examples of projectile motion? choose all that apply a. a soccer ball rolling across the ground in the northeast direction b. a car turning a corner, so it is heading south c. a javelin flying through the air d. a tennis ball lobbed over the net

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?