Ultimate Physics Study Guide - Questions & Answers

how far from a concave mirror (radius 22.0 cm ) must an object be placed if its image is to be at infinity?
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compared to radio waves, the velocity of visible light waves in a vacuum is a. less. b. more. c. the same.
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(ii) it takes 2.56 ms for the current in an lr circuit to increase from zero to 0.75 its maximum value. determine (a) the time constant of the circuit
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in the absence of an external magnetic field, can we say that one electron con- figuration has a lower energy than the other?
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a vertical spring scale can measure weights up to 210 n . the scale extends by an amount of 13.5 cm from its equilibrium position at 0 n to the 210 n mark. a fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.15 hz . part a ignoring the mass of the spring, what is the mass m of the fish?
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p2. an automobile tire has a volume of 1.64 x 10-2 m3 and contains air at a gauge pressure (pressure above atmospheric pressure) of 165 kpa when the temperature is 0.00 degrees celsius. what is the gauge pressure of the air in the tires when its temperature rises to 27.0 degrees celsius and its volume increases to 1.67 x 10-2 m3 ? assume atmospheric pressure is 1.01 x 105 pa.
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with the current, you can row 9 miles in 2 hours. against the current, your return trip takes 6 hours. find your average rowing velocity in still water and the average velocity of the current
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what are the magnitude and location (with respective to point a) of the resultant force on the horizontal gate? the gate width is w. fluid density is r. you can leave your answer in terms of variables (w, r, and g).
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a car has forces acting on it, as shown below. the mass of the car is 1000.0 kg. what is the acceleration of the car?
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a 6.2 kg object heading north at 3.0 m/s collides with an 8.0 kg object heading west at 3.5 m/s. if these two masses stick together upon collision, what is their velocity after collision?
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which statement describes what happens when light enters water? responses it speeds up. it speeds up. its speed stays the same. its speed stays the same. it can't get back out. it can't get back out. it slows down.
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An alien spaceship traveling at 0.550c toward the Earth launches a landing craft. The landing craft travels in the same direction with a speed of 0.790c relative to the mother ship (as measured by aliens on the mother ship). As measured on the Earth, the spaceship is 0.160 ly from the Earth when the landing craft is launched.(a) What speed do the Earth-based observers measure for the approaching landing craft?c(b) What is the distance to the Earth at the moment of the landing craft's launch as measured by the aliens (mother ship)?ly(c) What travel time is required for the landing craft to reach the Earth as measured by the aliens on the mother ship?yr(d*) What travel time is required for the landing craft to reach the Earth as measured by Earth-based observers?yr(e*) What travel time is required for the landing craft to reach the Earth as measured by those on the landing craft?yr
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when the distance between two masses doubles, the strength of the gravitational force between them
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describe how magnetic fields can disrupt electronics. In your answer, please use theterms: magnetic moment, Faraday's Law, and current
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infants become unresponsive and develop poor interpersonal skills.
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the acceleration due to gravity on planet MomOO is 4.09 m/s/s If an object weights 87.3 N on planet MomOO, what is its mass
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you reach out over the edge of a balcony to carefully throw a ball upwards at a speed of 3 m/s. the ball is in the air for a total of 4 seconds before it hits the ground. (10 points) a. with what speed does it hit the ground?
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true or false: we can determine if a star is moving toward or away from earth by measuring its brightness.
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the mgf has a faster conduction velocity compared with the lgf on an earth worm, because the mgf has (is)
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a 65 kg person dives into the water from the 10 m platform. a. what is her speed as she enters the water?
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after i stops my lexus engine, the warning sign appears when open door, but off when close the door, why?
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a force of 40 n is needed to keep a 10-kg steel box sliding across a level floor with a constant velocity of 8 m/s. what is the net force on the box?
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what is the change in internal energy of a system that takes in 4.23 106 j of heat, and does 4.50 105 j of work while dissipating 9.07 106 j of heat?
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what is the magnitude of the gravitational acceleration on this planet? express your answer in meters per second per second.
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