A friend says that astronauts in orbit are weightless because they are beyond the pull of earths gravity. Correct your friends ignorance.

A human cannon ball is fired st an angle of 60 degrees and a speed of 25 m/s. If the net is locations 35 m in front of the cannon, how high in air should the net be placed so that the performer lands in the center of it?

Sulfur and nitrogen oxide release into the atmosphere is most responsible for ozone depletion acid precipitation global warming eutrophication

Vectors are used to describe many physics concepts. any vector is completely defined with just 2 properties. which of the following statements is true

A student claims that since the three phases have different amounts of energy, molecules in substances gain or lose energy only during phase transitions. Explain what is wrong with this student's reasoning.

How much force is needed to accelerate a 100 kg mass at a rate of 2.5 m/s^2

8. A gas is contained in a horizontal piston-cylinder apparatus at a pressure of 350 kPa and a volume of 0.02 m3. Determine the work done by the piston on the gas if the cylinder volume is increased to 0.15 m3 through heating.

A 75.0 kg person stands on a scale in an elevator. (a) What does the scale read (in N and in kg) when the elevator is at rest?

The hinge at A and cable BDC support beam ABC. Cable BDC passes over the pulley D that is pinned to the ceiling. (Assume that the + x-axis is to the right and the + y-axis is up along the page.

The "zone of avoidance" a) Accounts for the absence of any planet between the orbits of Mars and Jupiter Prevents collisions between planets in the Solar System.

Electric current is ...