A glass of milk at 50 °C was kept in the open. After 10 minutes, the milk became cooler. Which statement is correct? The temperature of the surrounding air was less than 50 °C.
The temperature of the surrounding air was greater than 50 °C.
The final temperature of the milk was less than the final temperature of the surrounding air.
The final temperature of the milk was greater than the final temperature of the surrounding air.

Acave rescue team lifts an injured spelunker directly upward and out of a sinkhole by means of a motor-driven cable. the lift is performed in three stages, each requiring a vertical distance of 10.0 m: (a) the initially stationary spelunker is accelerated to a speed of 4.90 m/s; (b) he is then lifted at the constant speed of 4.90 m/s; (c) finally he is decelerated to zero speed. how much work is done on the 68.0 kg rescue by the force lifting him during each stage?

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

If the textbook weighs 19.6 newtons on venus, what is the strength of gravity on venus?