What correctly describes mechanical advantage

A farmhand pushes a bale of hay 3.9 m across the floor of a barn. she exerts a force of 88 n at an angle of 25∘ below the horizontal. a how much work has she done?

What are geology, astronomy, and physics is the answer hypothesis, scientific inquiries, scientific discplines, or protocols?

Jason has operated his own sheetrock installation business for many years. This means that jason is also qualified to put plumbing into the houses he works in. A) True B) False

Determine the type and degree of each of the following expressions 9x^4 y^9 x^4-3x^2+7x^5 19a^6b^2 + 8ab^3c - 27a^7

At a constant pressure, melting occurs by A) producing energy. B) absorbing energy. C) releasing energy. D) circulating energy.

The doppler effect is the change in observed frequency due to

Which of the following is NOT a vector quantity? (A) Acceleration (B) Average velocity (C) Linear momentum (D) Potential energy (E) Force

Which of Newton's laws of motion is demonstrated by a hammer pounding a nail into a board

Heated air molecules in a hot air balloon soon carried thermal energy to the top of the balloon. this is an example of ... conduction. Convection. Radiation. Cooling.

When you are ice skating, to get started, you push your skate backwards on the ice and, as a result, begin to move forward. Which law of motion is being described in this scenario?