Which of the following is a scalar quantity?

A.

90 km/hr north

B.

20 m/s at an angle of 25

C.

30 pounds

D.

15 N down

A wave has a wavelength of 8 mm and a frequency of 11 hertz. What is its speed? Your Answer:?

True or False: When a wire with a current is placed in a magnetic field, electrical energy is transformed into mechanical energy

What can cause the sea level to fall? ocean basins getting smaller or water being removed from the hydrological cycle ocean basins getting larger or water being removed from the hydrological cycle ocean basins getting larger or water returning to

What happens to the temperature as we traveled closer to the center of the earth?

Which of the following is an example of an aerobic activity? A. Running B. Swimming C. Dance D. All of the above

As an astronaut travels towards Earth, her weight A. decreases because gravity decreases. B. decreases because her mass decreases. C. increases because gravity increases. D. remains the same because her mass remains the same.

Lightning often strikes water. a. True b. False

How much work must be done on a 10 kg snowboard to increase its speed from 4 m/s to 6 m/s?

If a spacecraft that seems to be motionless in deep space is given some type of quick push, what will happen? A. The spacecraft will not move because it only works on earth. B.

A fast, white water cascade is also known as what?