Physics, 16.02.2021 04:10 nicollexo21
A ball with a mass of 0.200 kg is thrown straight down at the floor. It strikes the floor at a
speed of 10.0 m/s and bounces straight upward with a speed of 6.00 m/s. What impulse
is applied to the ball?
Answers: 1
Physics, 22.06.2019 12:50
Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.
Answers: 2
Physics, 22.06.2019 19:50
The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.
Answers: 3
Physics, 22.06.2019 21:00
Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine
Answers: 2
Physics, 22.06.2019 21:10
Select the best definition for wavelength. the height of an oscillating electromagnetic wave the rate at which electromagnetic waves oscillate. the distance between two crests of an electromagnetic wave. the oscillations of electric and magnetic fields select the best definition for frequency. the oscillations of electric and magnetic fields. the height of an oscillating electromagnetic wave. the distance between two crests of an electromagnetic wave. the rate at which electromagnetic waves oscillate
Answers: 1
A ball with a mass of 0.200 kg is thrown straight down at the floor. It strikes the floor at a
spee...
Mathematics, 17.11.2020 01:30
Mathematics, 17.11.2020 01:30
Mathematics, 17.11.2020 01:30
Mathematics, 17.11.2020 01:30
Mathematics, 17.11.2020 01:30
English, 17.11.2020 01:30
Mathematics, 17.11.2020 01:30
Chemistry, 17.11.2020 01:30
Mathematics, 17.11.2020 01:30