3. A fireman at the scene of a fire is holding a heavy hose out of which water is gushing. To keep his balance, he often has to lean forward.
• Explain why he needs to lean forward.

The density of an unknown gas at 98°c and 740 mmhg is 2.50 g/l. what is the molar mass of the gas with work showed?

Why would a doctor most likely restrict a patient's contact with other people while the patient receives internal radiation

Sandy is building a small toy car. he wants to use a balloon to power the toy car. he fills a balloon with air and then attaches a straw to the balloon. he tapes the balloon-straw combination to the car and then releases the end of the balloon. the toy moves forward as the air from the balloon comes out the back of the straw. what can sandy do to make the toy car move faster? a) use less air in the balloon. b) blow up the balloon more. c) use a longer straw. d) use larger tires.