Consider a uniform solid hemisphere of radius r and mass m which is kept in contact with a smooth wall as shown in the figure. Find the normal reaction exerted on the sphere by the wall. m (a) (b) (c) (d) 3mg 4 3mg 8 mg 5 2mg 5

The mean free path in a sample of gas is 30 nm. The collision feequency is 3 x 109 s-1.Calculate the mean relative speed in m s-1.

Apollo and Artemis are playing on the teeter‑totter in their school's playground. They both have approximately the same mass. They are sitting on either side of the teeter‑totter at about the same distance from the teeter‑totter's pivot point. The teeter‑totter is going up and down and they are having a great time! Mercury, the new kid in school, wanders by. Since they are very friendly kids, Apollo and Artemis ask Mercury to join them. Mercury joins Apollo on his side of the teeter‑totter and sits next to him. What should Artemis do in order to keep the fun going? 1)Move farther from the teeter‑totter's pivot point in order to balance out the new smaller torque provided by Mercury and Apollo. 2)Move closer to the teeter‑totter's pivot point in order to balance out the new larger torque provided by Mercury and Apollo. 3)Move farther from the teeter‑totter's pivot point in order to balance out the new larger torque provided by Mercury and Apollo. 4)Move closer to the…

A ball with a mass of 5 kilograms collides with a rod in a vertical position with a frictionless hinge at its base. The rod has a mass of 50 kilograms and is 1.36 meters long. The ball has a velocity of 30 meters per second initially (the left) and bounces off with a speed of 15.3 meters per second (the right). Assume energy is not conserved. Part A: What is theangula rvelocity of the rod immediately after the collision? Part B: Whatis the angular velocity of the rod at the bottom, after it has rotated 180 degrees?

After coming down a slope, a 60-kg skier is coasting northward on a level, snowy surface at a constant 15 m/s. Her 5.0-kg cat, initially running southward at 3.8 m/s, leaps into her arms, and she catches it. (a) Determine the amount of kinetic energy converted to internal energy in the Earth reference frame. (b) What is the velocity, measured in the Earth reference frame, of an inertial reference frame in which the cat's kinetic energy does not change?..

In a period of 1.2 s, 5.0  1023 nitrogen molecules strike a wall of area 8.5 cm2. If the molecules move at 285 m/s and strike the wall head on in a perfectly elastic collision, find the pressure exerted on the wall. (The mass of one N2 molecule is 4.68  10-26 kg.)

The drawing shows a hydsraulic chamber with a spring (string constant = 1250N/m) attached to the input piston and an object of 38 kg (resting on the output plunger).  The piston and plunger are at the same height  each having a negligible mass. By how much is the spring compressed from its unstrined position?

Strictly don't use chat gpt. If you give a Chatgpt answer i will report

Physics Ch. 10 #19

Consider the following experiment: 1.0 atm 1.0 mol N₂(g) 1.0 atm 3.0 mol H₂(g) ? The reaction chamber is initially divided by a partition into two unequal parts, as shown on the left side of the figure. The smaller volume contains 1.0 mol of N₂(g) at a pressure of 1.0 atm, while the larger volume contains 3.0 mol of H₂(g) at a pressure of 1.0 atm. The partition is removed, and the following reaction is carried out to completion in the combined volume shown on the right side of the figure: N₂(g) + 3 H₂(g) → 2 NH3(g). What quantities of which gases will be found in the reaction chamber after the completion of the reaction? (That is, what does the question mark on the right side of the figure stand for?) 0.5 mol N₂(g) 0.5 mol N₂(g) 0.0 mol N₂(g) 0.0 mol N₂(g) 0.0 mol N₂(g) 1.5 mol H₂(g) 1.5 mol H₂(g) 0.0 mol H₂(g) 0.0 mol H₂(g) 0.0 mol H₂(g) 2.0 mol NH3(g) 1.0 mol NH3(g) 2.0 mol NH3(g) 4.0 mol NH3(g) 1.0 mol NH3(g)