In an experiment a group of people drink various cups of coffee over a 1 month time span to determine the effect of the coffee intake on each person's heart rate. The experimental group has people that drink 1 cup a day, a group that drinks 2 cups a day and a group that drinks 3 cups a day. Is this a controlled experiment? Why or why not? Your answer
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Physics, 21.06.2019 18:10
Amass has an acceleration of 10- 2t. what is its velocity and displacement if it started at x- 4m and the initial velocity was 8m/s? at what time does it have 0 velocity? graph all graphs.
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Physics, 21.06.2019 19:00
Aman tries to push a box of mass 4 kg with a force of 5 n but the box remains stationary if the coefficient of static friction is 0.45, what is the value of the maximum force of friction?
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Physics, 22.06.2019 06:40
How does the kinetic energy of a charge change as the charge moves under the effect of an electric field from higher potential to lower potential? a.the kinetic energy increases.b.the kinetic energy decreases.c.the kinetic energy remains the same.d.the kinetic energy is always zero.
Answers: 1
Physics, 22.06.2019 10:00
Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?
Answers: 1
In an experiment a group of people drink various cups of coffee over a 1 month time span to determin...
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