Which of the following is a scalar?

a. 45 hours

b. 2 km north

c. 1.5 miles up

d. 24.6° clockwise

Why would you weigh more on saturn than on earth

A set of pulleys is used to raise a 200 N crate 5 m. to fo this the operator applies a force of 50 N and pulls in 25 m of rope. Find the efficiency of the pulley system. A: 50% B: 62.5% C: 75% D: 80%

If a sound travels 343m/s through air and has a frequency of 800Hz, what would the wavelength be of the same sound traveling through water 500m/s with the same frequency?

Changes in which no new kinds of matter are produced are called

Do we see planets because, like the sun, they are sources of light?

An exhausted bicyclist pedals somewhat erratically when exercising on a static bicycle. The angular velocity of the wheels follows the equation? (t) = at? bsin (ct) fort?0, where t represents time (measured in seconds), a = 0.500 rad/s2, b = 0.

This boy uses a force to lift a heavy rock. (He is carrying it.) What can the boy do if he wants to lift the same rock more quickly? A. use greater upward force B. use greater downward force C. decrease the force of gravity D.

The difference in electronegativity values between H and O is 1.4. What type of bond will these elements form?

True or false. when light passes from one medium to another the speed changes.

Examples of a scalar