An atom that changes so that it has an

electrical charge is a (n)

An astronaut is wearing a jet pack on a space walk. Including the jet pack, he has a mass of 90 kilograms. Initially, he is not moving with respect to the spaceship nearby. If the astronaut fires 0.

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A 24.0-V battery is connected in series with a resistor and an inductor, with R = 9.40 Ω and L = 6.40 H, respectively. (a) Find the energy stored in the inductor when the current reaches its maximum value.

Two bricks, of mass m1 and m2, are separated by a distance r. The gravitational force of attraction between them is 1.5x10-8 N.

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A box is dragged without acceleration in a straight-line path across a level surface by a force of 13 N. What is the frictional force between the box and the surface?

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Most cells cannot harness heat to perform work because

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A force of 100 newtons is applied to a box at an angle of 36º with the horizontal. If the mass of the box is 25 kilograms, what is the horizontal acceleration of the box?