A projectile is fired straight up at a speed of 30 m/s.
(a) How high does it go?
(b) Wh...
Physics, 06.10.2020 20:01 andyyandere8765
A projectile is fired straight up at a speed of 30 m/s.
(a) How high does it go?
(b) What is its speed 2.5 s later?
Answers: 3
Physics, 21.06.2019 15:10
On a cold day, when the air temperature is 0°c, you empty your lungs and take a deep breath, filling your lungs with 4.2 l of air. if you hold your breath until the temperature of the air in your lungs reaches 37°c, what is the volume of the air in your lungs at that point, assuming the pressure does not change?
Answers: 1
Physics, 21.06.2019 23:00
Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?
Answers: 1
Physics, 22.06.2019 02:30
Acup of coffee sits on the dashboard of an automobile. the car goes around a sharp curve. even though you hold the cup still, coffee still splashes out. this can best be explained due to a) density. b) friction. c) gravity. d) inertia.
Answers: 2
Physics, 22.06.2019 09:30
True or false graphs must include scales that increase by the same amount
Answers: 3
Law, 17.03.2020 16:29
Computers and Technology, 17.03.2020 16:29
Mathematics, 17.03.2020 16:29
Geography, 17.03.2020 16:30
Mathematics, 17.03.2020 16:30
Mathematics, 17.03.2020 16:30
Mathematics, 17.03.2020 16:30
Physics, 17.03.2020 16:30