Why is copper a pure substance? A. Because it is an element B. Because it is a compound C. Because it is a homogenous mixture

The slope of a good speed time indicates ? a. velocity b. acceleration c. direction d. speed

An airplane is flying with a velocity of 240 m/s at an angle of 30.0∘ with the horizontal, as the drawing shows. when the altitude of the plane is 2.4km,a flare is released from the plane. the flare hits the target on the ground. what is the angle θ?

A47 kg person in a rollercoaster moving through the bottom of a curved track of radius 47.7 m feels a normal force of 895 n. what is the net centripedal force acting on the person