A weather balloon is inflated to a volume of 2.2 x 10^3 L with 374 g of helium. What is the density of helium in grams per liter?

Which two statements are true? The definitions for electric force and electromagnetic force are identical. Electric forces and magnetic forces are different aspects of a single electromagnetic force.

A man with a mass of 60 kg walks up two flights of stairs in going from the first floor to the third floor (10 meters). Calculate his increase in potential energy

The nightly winter temperature drop in a seaside town is usually less than that in nearby towns that are farther inland. explain.

Identify the correct statement of Ohms law

A wire placed on the plane of this screen carries a current toward the top of the screen. The wire feels a magnetic force toward the right. The direction of the magnetic field causing this force is which of the following? a. inward into the screen b.

At a certain factory, 340 kg crates are dropped vertically from a packing machine onto a conveyor belt moving at 1.00 m/s. (A motor maintains the belt's constant speed.) The coefficient of kinetic friction between belt and crate is 0.400.

A hydraulic lift is used to lift a heavy box that is pushing down on a 1.5-m2 piston with a force of 1,700 N. What force needs to be exerted on a 0.12-m2 piston to lift the box?

Rauol's friend Johnny sets out from his house in the city. His displacement is 900 m 80° North of west. What is the x component of his displacement vector?

What is the relationship between gravity and mass? What is the relationship between gravity and distance?

A person performs 300 j of work over the course of 60 seconds how much power they did required