Other Physics Answers

1.) Two objects have masses of 300 kg and 500 kg. Their centers are separated by distance of 25 m. Find the gravitational attraction between them.

An object is thrown vertically and has an upward velocity of 25 m/s

when it reaches one fourth of its maximum height above its launch point.

What is the initial (launch) speed of the object?

Please explain how to answer this exercise.

When the speed of a fluid flowing in a pipe increases, what happens to the internal pressure in the fluid?

Why is it that an aneroid barometer is able to measure altitude as well as atmospheric pressure?

When you drink liquid through a straw, it is more accurate to say that the liquid is pushed up the straw rather than sucked up the straw. What exactly is pushing? Explain

7. What is the mass of a cubic meter of air at 20oC at sea level?

How does the density of gases at different elevations in the atmosphere differ from the density of liquids at different depths?

What is the buoyant force that acts on a 100-ton ship? (To make things simple, give your answer in tons.)

If the buoyant force on a submerged object is less than the weight of the object, how do the densities of the object and water compare?

Given the wavefunction of a standing wave: y(x,t) = A sin(πx)cos(2πt), where x and y are in meters and t is in seconds. The position of the second anti-node from the end x = 0 is at: