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A psychologist wants to study the effects of video games on pre-teens' mood. She divides the pre-teens into two groups. She has one group play Moral Combat on an Xbox for two hours. The other group plays basketball for two hours. The researcher then gives each participant a questionnaire to fill out about their mood.
Based on the ethical requirements to avoid harm and to inform participants, 1) what would be potential harm for the participants associated with this study? Identify both physical and psychological factors. 2) What would be strategies to minimize the risks you identified?
An electric point charge of Q1 = 7.85 nC is placed at the origin of the real axis. Another point charge of Q2 = 3.83 nC is placed at a position of p = 3.99 m on the real axis. At which position can a third point charge of q = -7.31 nC be placed so th..
A dentist uses a mirror to examine a tooth that is 1.25 cm in front of the mirror. The image of the tooth is formed 5.0 cm behind the mirror. Determine the mirror's radius of curvature
Suppose you have a spherical balloon filled with air at room temperature and 1.0 atm pressure; its radius is 18cm. what's the balloon's new radius
What is the difference between weight and mass? Explain your answer.
The magnetic field in a single-loop coil of area 53 cm2 steadily changes from 6.0 x 10-3 T to 9.5 x 10-3 T in 0.53 s. What emf is induced in the coil
A 2.00 x 103-kg car has a speed of 12.0 m/s. The car then hits a tree. The tree doesn’t move, and the car comes to rest. Find the change in kinetic energy of the car. Find the amount of work done in pushing in the front of the car.
The cockroach finds a bread crumb on the rim and, of course, stops. What is an angular speed of the lazy Susan after the cockroach stops.
Consider two uniformly charged parallel plates as shown in the figure. The magnitudes of the charges areequal.If the plates are 1.0 cm by 1.0 cm squares,and the charges on the plates are +/- 2.6 μC respectively,what is the magnitude of the electric f..
A parallel-plate capacitor with area 0.500 m2 and plate separation of 2.00 mm is connected to a 15.00-V battery. How much charge is stored on the plates
An indoor track is to be designed such that each end is a banked semi-circle with a radius of 28 m. What should the banking angle be for a person running at speed v=6.4 m/s
A 10 kg mass slides 15 meters down the 30 degree incline. The coefficients of friction between the sliding mass and the inclined slope are 3.0 and 0.45 for the kenetic adn static, respectively. Draw a free body diagram of the sliding mass on the i..
A small object is placed 45 cm from a convex refracting surface of radius of curvature 15 cm. If the surface separates air from glass of refractive index 1.5.
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