Acar rounds a curve while maintaining a constant speed. is there a net force on the car as it rounds the curve?
a: it depends on the sharpness of the curve and speed of the car.
b: no - it's speed is constant
c: yes

When an object is heated it contracts. a. true b. false

Hydrogen and helium are both members of?

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit