Parallax of the stars is created by
a. different phases of the moon
b. different locations of earth in its orbit
c. motion of the stars

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.

At very high pressures, gases become and will eventually a) more dense; become hotter b) more dense; change to a liquid or solid c) less dense; combust d) less dense; turn into a liquid

We put a force of 50n on an object and the acceleration is 100 m/s². what is the mass of the object?