Two objects are being lifted by a machine. One object has a mass of 2 kg, and is lifted at a speed of 2 ms. The other has a mass of 4 kg and is lifted at a rate of 3 m/s.
Which object has more kinetic energy while it is being lifted?
What does this tell you about the variable(s) that impact kinetic energy?
Which object had more potential energy when it was lified a distance of 10 m?โ
What does this tell you about the variable(s) that impact gravitational potential energy?
Answers: 3
Physics, 22.06.2019 02:30
Agas contained within a piston-cylinder assembly undergoes three processes in series: process 1๏ 2: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 2๏ 3: constant pressure expansion to 1 liter. process 3๏ 1: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat
Answers: 2
Physics, 22.06.2019 03:50
The force acting on a beam was measured under the same operating conditions and a sample of 5 data points was collected. this process was repeated by 3 observers. the pooled standard deviations of these 3 data sets was 1.21. determine the true mean force using all pooled data (with a 95% probability). the result should look like this: true mean = mean +/- margin of error
Answers: 1
Physics, 22.06.2019 04:00
Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?
Answers: 1
Physics, 22.06.2019 05:40
Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.
Answers: 3
Two objects are being lifted by a machine. One object has a mass of 2 kg, and is lifted at a speed o...
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