What else did you change in the Levers lab when you changed the position of the fulcrum?

Effort force

Gravity

Weight

Resistance force

Which of the following correctly describes magnetic poles.

Rail guns can accelerate an object by using the magnetic force on a current carrying device. A rail gun is constructed to accelerate a length of copper wire, having a radius of 5.1 x 10-4 m and density,  = 8960 kg/m3.

Two children push on opposite sides of a door. The first child pushes with a force of 30 N perpendicular to the door at a position 0.4 m from the hinges of the door.

When a rocket lifts off what provides the momentum match of the upper lift

What is the Meaning of Electromagnetism?

Current flows through a resistor; (a) with no direction since it is not a vector (b) from any potential to any different potential (c) from high potential to low potential (d) from low potential to high potential (e) cannot be determined

A concave mirror has a focal length of 11 cm. What is its radius of curvature?

Assume each tick mark represents 1 cm. Calculate the total displacement from 0 if an object moves 3 cm to the left, then 7 cm to the right, and then 6 cm to the left. The object moves cm to the left. What is the total distance the object travels? cm

A sound wave has a frequency of 510 Hz in air. Which of these is closest to the wavelength of this sound? (The speed of sound in air is 343 m/s.

The diagram below shows the process of distillation of saltwater into pure water. Where is the pure water in the diagram? a. A b. B c. C d. D