Physics

Recall the observed behavior of the compass during the mapping of the magnetic field. Which of the following descriptions best matches the behavior you observed? Two correct answers required for full credit.A. Where the field is strong the compass needle readily and quickly aligns with rapid oscillations around the equilibrium direction.B. Where the field is strong the compass needle slowly oscillates around the final equilibrium position.C. Where the field is weak the compass needle rapidly oscillates around the final equilibrium position.D. Where the field is weak the compass needle slowly oscillates around the final equilibrium position.E. Where the field is weak the compass needle readily and quickly aligns with rapid oscillations around the equilibrium direction.
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An example of a metalloid, elements with properties between metals and non-metals, is:A. siliconB. ironC. oxygenD. copper
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A student throws a set of keys vertically upward to her sorority sister, who is in a window 3.50 m above. The second student catches the keys 1.10 s later. (a) With what initial velocity were the keys thrown? magnitude m/s direction (b) What was the velocity of the keys just before they were caught? magnitude m/s direction
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You throw a rock upward. The rock is moving upward. but it is slowing down. If we define the ground as the origin, theposition of the rock is ____ and the velocity of the rock is ____ .A. positive, positiveB. positive, negativeC. negative, positiveD. negative. negative
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The period of a carrier wave is T=0.005 seconds. Determine the frequency and wavelength of the carrier wave.
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A 230mg piece of gold is hammered into a sheet measuring 23cm x 17cm. What is the thickness of the sheet in meters? Density of gold is 19.32g/cm3
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falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.040 s. The average force exerted on him by the ground is 18 000 N, where the upward direction is taken to be the positive direction. From what height did the student fall
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You are on the ground and observing a jet traveling in air at a constant height of 4500 m with a speed of 650 m/s. How long after the spaceship has passed directly overhead will the shock wave reach you
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Which of Galileo's observations directly disproved Ptolemy's epicycle model of the Solar System, showing that the Sun is at the center and not Earth?
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Baseball players wear batting gloves to increase
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A 6 kg bowling ball moves with a speed of 3 m/s. How fast does a 7 kg bowling ball need to move so that it has the same kinetic energy?
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How fast is a ball going when it hits the ground after being dropped from aheight of 13 m? The acceleration of gravity is 9.8 m/s2
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Austin left the park traveling 4 mph. Then, 3 hours later, Wyatt left traveling the same direction at 10 mph. How long until Wyatt catches up with Austin?
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What is the self-inductance of a solenoid 30.0 cm long having 100 turns of wire and a cross-sectional area of 1.00 10-4 m2? (0 = 4 10-7 T m/A)
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g If you keep the launch angle fixed, but double the initial launch speed, what happens to the range?
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Nuclear reactors use fuel rods to heat water and generate steam. Is this process endothermic or exothermic?
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From the following list of words, choose the correct one to complete the statement: absorption, reflection, emission, transmission. a. Light coming from your computer screen is an example of _________________. b. Yellow light hitting a yellow banana is an example of _______________. c. Blue light hitting a yellow banana is an example of _______________. d. Sunlight passing through a glass door is an example of ______________.
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A point charge is placed at the center of a spherical Gaussian surface. The electricflux Eischangedif(a) a second point charge is placed outside the sphere(b) the point charge is moved outside the sphere(c) the point charge is moved off center, but still inside the original sphere(d) the sphere is replaced by a cube of one-tenth the volume (the original charge remains in thecenter)
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Calculate the speed of an electron (in m/s) after it accelerates from rest through a potential difference of 160 V.
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The velocity of the transverse waves produced by an earthquake is 5.05 km/s, while that of the longitudinal waves is 8.585 km/s. A seismograph records the arrival of the transverse waves 56.4 s after that of the longitudinal waves. How far away was the earthquake? Answer in units of km.
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A 2-m telescope can collect a given amount of light in 1 hour. Under the same observing conditions, how much time would be required for a 6-m telescope to perform the same task? A 12-m telescope?
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The earth has a vertical electric field at the surface, pointing down, that averages 100 N/C. This field is maintained by various atmospheric processes, including lightning. What is the excess charge on the surface of the earth?
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A very large sheet of a conductor carries a uniform charge density of 4.00 pC/mm2 on its surfaces. What is the electric field strength 3.00 mm outside the surface of the conductor?
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A 170 g air-track glider is attached to a spring. The glider is pushed in 11.2 cm against the spring, then released. A student with a stopwatch finds that 14 oscillations take 11.0 s. What is the spring constant?
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