Which of the following is a physical quantity that has a magnitude but no direction?

a. vector

b. scalar

c. resulant

d. frame of referance

Which of the following best describes what we mean by the universe? (A) all the galaxies in all the superclusters (B) the sum total of all matter and energy (C) a vast collection of stars that number as many as the grains of sand on all the beaches

A ball is dropped from rest. What will be its speed when it hits the ground in each case. a. It is dropped from 0.5 meter above the ground. b. It is dropped from 5 meters above the ground. c. It is dropped from 10 feet above the ground.

A sound wave enters a new medium where sound travels faster. How does this affect the frequency and wavelength of the sound? A. The frequency increases and the wavelength decreases. B. The frequency decreases and the wavelength increases.

The people in a location in Florida are evacuating their homes and moving to inland areas temporarily.

In 1963 Caltech astronomer Maarten Schmidt observed that quasar 3C273 was moving at 15.8 percent of the speed of light away from us and thus conculded it could not be an object in our galaxy since it would have left the galaxy a long time ago at

What effect can be observed in a planet's speed in its orbit as it travels away from the Sun? A. increases B. remains same C. decreases D. unpredictable

A 0.71 kg spike is hammered into a railroad tie. The initial speed of the spike is equal to 3.8 m/s. If the tie and spike together absorb 38.

Suppose the car now accelerates from 0 m/s to 30.0 m/s in 5.00 s. If the wheels have a radius of 24.1 cm, what is their angular acceleration? 6.00 rad/s-2 O 125 rad/s2 0.25 rad/s2 O 25.0 rad/s

What would most likely cause an increase in cloud formation?

Heating food undera heat lamp is an example of heat transfer by