What causes muscles to move?

Late one night on a highway, a car speeds by you and fades into the distance. Under these conditions the pupils of your eyes have diameters of about 7.3 mm. The taillights of this car are separated by a distance of 1.

What is the function of a seismograph?

Data from a survey: A. will be only numbers based because surveys have to be multiple choice. B. can be qualitative or quantitative depending on the questions asked. C. can include only descriptions of things because survey questions are open ended.

where would a bowling ball and a napkin fall with the same acceleration. Check all that apply. A. Dropped off of the Leaning Tower of Pisa. B. on the moon. C. In a vacuum chamber. D. anywhere that is not very windy.

A postively charged object is placed within a positive electric field. what happens to the object?

Imagine riding On a merry-go-round at the center. As you walk to the outer edge, the merry-go-round slows in order to conserve angular momentum. True or false?

17. (a) Will the electric field strength between two parallel conducting plates exceed the breakdown strength for air (3.0*106 V/m) if the plates are separated by 2.00 mm and 5.

What property of sound enables us to distinguish one sound source from another?

The table below shows the right ascensions of two stars at a location. Star 1 - 4 right ascension (in Hour) Star 2 - 3 right ascension (in Hour) Which of these statements is correct about the stars?

H-2 + H-3 → He-4 + Consider the nuclear reaction that takes place in the sun. Two nuclides of hydrogen fuse to form helium. Is helium the only product of this reaction? If no, identify any additional products. A) Yes, He-4 is the only product. B) No.