What do I need to think in my mind when I hear about electric lines of forces?

An aerobatic airplane pilot experiences weightlessness as she passes over the top of a loop-the-loop maneuver. The acceleration of gravity is 9.8 m/s 2. If her speed is 450 m/s at this time, find the radius of the loop. Answer in units of km

About 40 j is required to push a crate 4 m across a floor. if the push is in the same direction as the motion of the crate, the force on the crate is about

When two metal objects, X and Y, are connected to each other by a conducting wire, object X gains electrons.? From this information, it can be inferred that before the connection was made, object X, compared with object Y, must have had: A.

In what state do hydrogen and helium exist in a star

All objects anywhere on or near the Earth are A. held in place by several forces pushing and pulling on them. B. spun in a counterclockwise direction by magnetic forces. C. pulled toward Earth by the force of gravity. D.

Define the term volt.

A baseball player was hit by a baseball in the left eye and complains of double vision. What should you do? A. Restrict spinal movement B. Assess pupillary response C. Perform a detailed exam D. Apply ice to orbit

An approaching storm is moving at 15 km an hour what do you need to know to determine its velocity

How did astronomers precisely determine the length of an Astronomical Unit in the 1960s?

If a 1.50 kg mass revolves at the end of a string 0.50 m long, and its tangential speed is 6.0 m/s, calculate the centripetal force.