A 2 kg toy car moves at a speed of 5 m/s. a. What is the kinetic energy of the car?b. If a child applies a 3 N force for 2 m in the same direction the car is already moving, how much work is done on the car?c. What is the change in the car’s kinetic energy from the applied force?d. What is the final kinetic energy of the car?e. What is the velocity of the car after the child applies the 3 N force?

In which situation has the independent variable for the experiment been changed? check all that apply. changed from counting the number of duckweed at day 0 and day 14 to counting them every day changed from testing duckweed growth in beakers to testing duckweed growth in large outdoor tanks changed from testing the effect of ph on duckweed growth to testing the effect of light levels on duckweed growth changed from testing the effect of acid ph on duckweed growth to testing the effect of basic ph on duckweed growth

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

This is the number of complete movements of a wave per second.