Explain why the tip of a sewing needle is sharp

Lakes A) always contain fresher water B) are recharged by precipitation C) are usually found near the equator D) accounts 25% of earths freshwater

The power by an electric motor is 301 W. How long will it take the motor to do 3880 J of work?

Which science deals most with energy and forces? SC. 912. N. 1.2 a. biology C. botany b. physics d. agriculture

What is a solenoid? A. a non-magnetic piece of metal B. a straight wire surrounded by an electric current C. a coil of wire with an electric current in it D. one part of a pair of dualnoids

Bob is pushing a lawn mower up a hill with the mower tilting slightly to the right. suppose that we wish to use vectors to determine the total force acting on the mower. what forces should be considered?

A cheetah can run at 30 m/s, but only for about 12s. How far will it run in that time

A car is traveling 80 km/h if the car's speed remains constant how far will it have traveled in 3 hours a. 3km b. 26.7km c. 80 km d. 240 km

True or False? Gases such as water vapor condense when they are * heated*.

If a chromosome on unfolds itself how is transcription enhanced

Two friends, barbara and neil, are out rollerblading. with respect to the ground, barbara is skating due south at a speed of 5.9 m/s. neil is in front of her. with respect to the ground, neil is skating due west at a speed of 1.4 m/s.