Scientists think the is a solid layer of iron with a liquid layer of iron around it

An atom has a charge of 1+. If the atoms nucleus caintains 23 protons, the atom must have how many electrons

Bill and Nageen have each built an electric motor and they are testing them by having them lift boxes. Bill's motor lifts a box 0.35 metres in 2 seconds. Nageen's motor lifts the same box 0.35 metres in 1.8 seconds.

Which of the following universal forces is the weakest? A) electric B) gravitational C) magnetic D) strong nuclear I also need some explanation for this one

A train is 240 meters long and travels 20 m/s. How long does it take to cross a 360-meter long bridge? S

What is a main difference between the Schrodinger model and the bohr atomic model

Which would cause the largest increase in a mountain climber's gravitational potential energy?

A record of travel along a straight path is as follows: 1. Start from rest with constant acceleration of 2.60 m/s2 for 11.0 s. 2. Maintain a constant velocity for the next 2.60 min. 3. Apply a constant negative acceleration of - 9.38 m/s2 for 3.

What do we get when two sound waves of slightly different frequencies interfere with each other?

You are standing in a moving bus, facing forward, and you suddenly fall forward as the bus comes to an immediate stop. The force acting on you that causes you to fall forward is A) the normal force due to your contact with the floor of the bus.

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position.