Physics, 28.12.2019 01:31 mikeeway33
To check the effect of cold temperatures on the battery's ability to start a car researchers purchased a battery from sears and one from napa auto parts. they disabled a car so it would not start, put the car in a warm garage, and installed the sears battery. they tried to start the car repeatedly, keeping track of the total time that elapsed before the battery could no longer turn the engine over. then they moved the car outdoors where the temperature was below zero. after the car had chilled there for several hours the researchers installed the napa battery and repeated the test. is this a good experimental design?
Answers: 1
Physics, 22.06.2019 05:20
Suppose an objects initial velocity is 10m/s and it’s final velocity is 4 m/s. mass is constant. what can best be concluded about the object based in the work-energy theorem
Answers: 2
Physics, 22.06.2019 10:40
As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.
Answers: 1
Physics, 22.06.2019 13:00
The substances that are necessary for producing of certain hormones and that store and transport vitamins
Answers: 1
To check the effect of cold temperatures on the battery's ability to start a car researchers purchas...
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