1) The model airplanc has a mass of 3 kg, and is flying horizontally at a constant speed of 21 m/s at a radius of 2.7 m.
a) What tension is in the string?
b) If the plane's mass is doubled, what happens to the tension is part a?
c) If the plane's speed is doubled, what happens to the tension is part a?
d) If the string's length is doubled, what happens to the tension is part a?

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.