Are chemical reactions necessary in life

What type of collision is it if it bouunces of of each oyher?

A balloon is released 15 feet away from an observer. The balloon is rising vertically at. a rate of 2 ft/sec and at the same time the wind is carrying it horizontally away from the observer at a rate of 3 ft/sec.

To obtain orange, green, or violet, which colors should be mixed?

Why does a bowling ball move without acceleration when it rolls along a bowling alley?

You place the spring vertically with one end on the floor. You then drop a book of mass 1.10 kg onto it from a height of 0.600 m above the top of the spring. Find the maximum distance the spring will be compressed.

What are the arrangement of resistors in series

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?