Why are common measurement systems important

How is a star's emission spectrum used to study stars?

An arrow is fired directly horizontal off a cliff that is 10.0 meters tall with a velocity of 65.5 m/s. a) How long is the arrow in the air? b) What is the range of the arrow?

Which fact is NOT true about gravity? Gravity depends on distance. Gravity depends on weight. The force of gravity between two objects will never be 0. Gravity depends on mass.

An object start s from rest and accelerates at a rate of 2.50 m/s for 7.00 seconds. The velocity at the end of the 7.00 seconds is?

If the horizontal component of a net force is 68 newtons and the angle made by the net force with the horizontal is 19.2°, what is the value of the net force?

Ariana is accelerating her car at 4.6 m/s2. It took her 10 seconds to reach this acceleration. Her starting velocity was 0 m/s. What was her final velocity? A. 0 m/s B. 2.3 m/s C. 4.6 m/s D. 46 m/s

Read the scenario below and answer the question that follows. Molly and Mark are new parents. Their daughter Alvina often cries when she is uncomfortable. Each time Alvina cries, her parents give her a stuffed rabbit.

A 6.0-kg ball is sliding to the right at 25.0m/s and strikes a second ball (15-kg) that is initially at rest head-on. After the collision, the 6-kg ball moves to the left at 12.5m/s. What is velocity of the second ball?

At a certain harbor, the tides cause the ocean surface to rise and fall a distance d (from highest level to lowest level) in simple harmonic motion, with a period of 12.4 h. how long does it take for the water to fall a distance 0.

What is the average speed of an object with a total distance traveled of 45 meters in 50 seconds