Ultimate Physics Study Guide - Questions & Answers

a candle that is 10.0 cm high is placed 30.0 cm in front of a diverging lense the lens has a focal length of -20.0 cm what is the magnification of the image
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a 23-month-old child pulls a pan of hot water off the stove and spills it onto her chest and arms. her mother is right there when it happens. what should the mother do immediately?
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when the ice shuts off and the engine coolant temperature is reduced, what component compensates for the drop in pressure inside the closed coolant system?
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ii. during the time the object is in contact with the wall, is the magnitude of the acceleration greater than, less than, or the same as it was while it was rolling down the ramp?
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a 2,500-kg truck moving at 10.00 m/s strikes a car waiting at a traffic light, hooking bumpers. the two continue to move together at 7.00 m/s. what was the mass of the struck car?
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a convex spherical (diverging) mirror with a focal length of 25 cm has a 4.0 cm tall object placed 100 cm in front of it. what is the position of the image relative to the mirror?
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consider a system of particles interacting with each other through potentials depending only on the scalar distances between them and acted upon by conservative central forces from a fixed point. obtain the hamiltonian of the particle with respect to a set of axes, with origin at the center of force, which is rotating around some axis in an inertial system with angular velocity w. what is the physical significance of the hamiltonian in this case? is it a constant of the motion?
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a spring is attached to a platform so that it is hanging down vertically. a 1 pound weight is attached and released. the tension in the spring is such that it extends 6 inches and then rebounds up 5.1 inches, 85% of the original displacement. if the oscillations continue down and up in the same manner, i.e. the spring is extending and recoiling a length equal to 85% of the previous displacement, what is the total distance the weight has traveled when the spring reaches equilibrium? write the exact answer. do not round.
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suppose the gravitational acceleration at the surface of a certain moon a of jupiter is 2 m/s2. moon b has twice the mass and twice the radius of moon a. what is the gravitational acceleration at its surface? neglect the gravitational acceleration due to jupiter.
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the rms speed of a gas is increased by 1%. what is the percent change in the temperature? what is the percent change in the pressure of the gas, assuming its volume is held constant?
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A 20 g ball of clay traveling east at 2.5 m/s collides with a 25 g ball of clay traveling north at 2.0 m/s .What is the speed of the resulting 45 g ball of clay?What is the direction of the resulting ball of clay?
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The geothermal gradient is defined as the increase in temperature with depth in the Earth. In normal continental crust a typical geothermal gradient within the first 3 to 5 kilometers (2 or 3 miles) of Earths surface is about 25C/km. This gradient, however, is not sustained but decreases to no more than about 16C/km at a depth of 40 km.
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how does transfer of thermal energy by radiation differ from convection and conduction?how does transfer of thermal energy by radiation differ from convection and conduction?
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A British Thermal Unit (BTU) is defined as the amount of energy required to raise the temperature of one pound of water by one degree Fahrenheit. Your family has a water heater that is rated for 30,000 BTUs and has a capacity of 500 pounds of water. What is the expected change in temperature of the water?a. 140 Fb. 120 Fc. 90 Fd. 60 Fe. 30 F
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) two 0.85-m-long pendulum hang side by side. the masses of the pendulum bobs are 75 g and 95 g. the lighter bob is pulled aside until its string is horizontal and is then released from rest. it swings down and collides elastically with the other bob at the bottom of its arc. to what height does each bob rebound? organize and plan
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the balance wheel of an old-fashioned watch oscillates with angular amplitude p rad and period 0.500 s. find (a) the maximum angular speed of the wheel, (b) the angular speed at displacement p/2 rad, and (c) the magnitude of the angular acceleration at displacement p/4 rad.
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if betelgeuse were to radiate all of its energy at the peak-intensity wavelength, how many photons per second would it radiate?
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which is a major difference between what we've seen in discovered exoplanets and our own solar system?
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on a horizontal axis. a 2-kg mass is suspended from the wheel by a rope wound around the rim. find the
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light is projected onto a semi-conductive surface. however, no electrons are ejected. if the intensity is held constant but the frequency of light is increased, what will happen?
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5. if the star sirius emits 23 times more energy than the sun, why does the sun appear brighter in the sky? include the terms luminosity and apparent brightness in your response.
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oe and bill are playing tug- of- war. joe is pulling with a force of 200 n. bill is simply hanging on 180) to the rope. neither person is moving. what is the tension of the rope?
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the gravitational force is considered a very weak force. yet, it is strong enough to hold earth in orbit around the sun. explain this apparent disparity.
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a student records the mass of objects a, b, c, and d. then the velocity of each object is measured using a track and timer. does object a, b, c, or d have the greatest momentum?
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