A ball is thrown straight up into the air. Its position at 7 instants of time are shown in the figure; the maximum height is reached at position 4. At which of the labeled points is the acceleration of the ball smallest?

7,9

Physics & Space Science

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Hot air flows through a square 60 cm x 60 cm steel heating duct and the outside surfaces are at 45ºC when the surrounding quiescent air is at 15ºC. Estimate the heat loss from the duct per unit length of the duct.

What will be an ideal response?

Physics & Space Science

Magnetic Poles: A straight bar magnet is initially 4 cm long, with the north pole on the right and the south pole on the left. If you cut the magnet in half, the right half will

A. contain only a north pole. B. contain a north pole on the right and a south pole on the left. C. contain only a south pole. D. no longer contain any poles.

Physics & Space Science

The amount of energy equivalent to one kilogram of mass at rest is

A) 9.0 × 1016 J. B) 3.0 × 108 J. C) 4.5 × 1016 J. D) 6.0 × 10-3 eV. E) 1.2 × 108 eV.

Physics & Space Science

The oblateness of the jovian planets' disks is caused by their ________

Fill in the blank(s) with correct word

Physics & Space Science