An air-track cart is attached to a spring and completes one oscillation every 5.67 s in simple harmonic motion
At time t = 0.00 s the cart is released at the position x = +0.250 m. What is the position of the cart when t = 29.6 s?
A) x = 0.0461 m
B) x = 0.210 m
C) x = 0.218 m
D) x = 0.342 m
E) x = -0.218 m
A
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Two masses are connected by a string which passes over a pulley with negligible mass and friction. One mass hangs vertically and one mass slides on a frictionless horizontal surface. The vertically hanging mass is 6.00 kg and the mass on the horizontal surface is 4.00 kg. The acceleration of the 4.00 kg mass is
A. 1.98 
B. 3.92
C. 5.88
D. 6.75
E. 7.84
You may have heard it said that all objects, even ones at the temperature of our bodies, are continually emitting electromagnetic radiation. Is this true?
A) Yes, and the radiation referred to results from the trace amounts of radioactive material that have accumulated in our bodies from the food we eat. B) Yes, and the radiation from our bodies is mostly in the infrared region of the spectrum, and hence not detected by our eyes. C) Yes, and this radiation is mostly in the form of radio waves, which is a common source of static often heard on an AM radio. D) No, this is not true. If a person were emitting electromagnetic radiation, he could be seen glowing in the dark, and this is obviously not the case for most people.
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Indicate whether the statement is true or false
Process of Science: If any single test of a scientific hypothesis contradicts it, the hypothesis must be revised
Indicate whether the statement is true or false