A motor is used to produce

4.0 waves each second in a string.

What is the frequency of the waves?

F 0.25 Hz

G 15 Hz

H 25 Hz

J 4.0 Hz

A boy weighs 40 kilograms. He runs at a velocity of 4 meters per second north. Which is his momentum?

What evidence is there that the Universe began in a big bang?

What are the units for the spring constant

Which of the following statements are true? A solid can diffuse into a liquid, but a solid cannot diffuse into another solid. A solid can diffuse into both a liquid and another solid. A liquid can diffuse into another liquid.

How would the carrying capacity for northern cardinals in a mixed-oak forest be affected if the number of nesting sites decreased?

A race car travels a circular track at an average rate of 135 mi/hr. The radius of the track is 0.450 miles. What is the centripetal acceleration of the car?

Between a substance and a mixture.

Two massive objects are fixed in position. A third object is placeddirectly between the first two at the position at which the totalgravitational force on the third object due to the two massiveobjects is zero.

Which statement best describes the magnetic properties of a material? Magnetic materials have many spinning, unpaired electrons Paired electrons of magnetic materials can move to other atoms Electrons of magnetic materials are strongly held by

when we examine the structures of the other terrestrial planets in our solar system, we see that their structure is similar to Earth's. Why do you think this is the case?