A boy drops a ball from an observation tower. The ball hits the ground in 5.0 s. What is the ball's velocity at the time of impact?

A. 0 m/s

B. 98 m/s

C. 49 m/s

D. 123 m/s

25. Which components of the solar system are indicated by orbits 1-9? Name each component in order from the sun, and classify each according to type.

A particle has an acceleration of + 6.24 m/s2 for 0.300 s. At the end of this time the particle's velocity is + 9.81 m/s. What was the particle's initial velocity?

Which of the following is consider clean energy

Sodium and potassium are soft, silvery metals. They are both solids at room temperature and react strongly when combined with water. Which statement about sodium and potassium is probably true? * 26* A.

What is a plank in science?

ions are atoms or groups of atoms that have a positive or negative charge. which of the following statements is true of ions?

1. According to the nebular theory, the solar system formed from? A. accretion of protoplanets. B. a large, thin cloud of dust and gas. C. colliding planetesimals. D. all of the above 2.

What is the difference between tangential acceleration and centripetal acceleration?

A ball rolls down a ramp. The ball has a mass of 1 kg and it has 18 joules of kinetic energy. What is the ball's speed?

Scientists now think high-fructose corn syrup may disrupt appetite control, making people more often o sleep get angry Ceat fast