When using a pulley with a mechanical advantage of 1.5, a worker applies 250N to the pulley. The pulley is used to lift a heavy crate. How much force does the pulley apply to the crate

No matter what happens to us, we still have which of the following?

What is the mass of a falling rock if it produces a force of 147 N

Which is not a protection against electrical accidents? a. fuse b. conducting wire c. insulation d. grounded plug

A telescope with a 60 mm objective lens collects how many times as much light as does your eye's 6 mm pupil?

Two students make the following claims:Student 1 claims that the work done by the gravitational force on an object as it falls depends only on the vertical distance of the fall.

What is the force on a 1-kg ball that is falling freely due to the pull of gravity

Which would react chemically by forming an ionic bond? A. 2 chlorine atoms with 7 valence electrons each B. 1 neon atom with 8 valence electrons and 1 lithium atom with 1 valence electron C.

Which of these are considered an oxidizing mutagenic agent? x-rays benzopyrene gamma rays

5. A B note has a frequency of 493.88 Hz. Calculate its wavelength in meters.

When one of the electrons of a particular atom undergoes a transition to a quantum state of lower energy, it a) collides with another of its electrons b) exchanges quantum states with another of its electrons c) undergoes a transition to a quantum