Master Physics with Fun Quizzes & Brain Teasers!

from planet mia, the angular size of the sun is 0.8 degrees. the distance from mia to sun is 1.3 x 108 km. what is the physical size (i.e. diameter) of the sun?
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what is the volume of one mole of gas at 100.0 oc and 1.000 atmosphere of pressure?
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what is the entropy change in an free expansion, a gas expands into a vacuum?
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Consider when the driver applies the brakes of a light truck traveling 40 km/h, it skids 3.5 m before stopping. How far will the truck skid if it is traveling 80 km/h when the brakes are applied?
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what is the -40 dbc (bessel approximation) bandwidth of an fm transmitter having a deviation () of 2 khz and an information frequency of 2 khz? (enter your answer in khz.)
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if an electron (mass = ) is released at a speed of in a direction perpendicular to a uniform magnetic field, then moves in a circle of radius 3.8 cm, what must be the magnitude of that field?
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ndicate whether the error described below will result in a higher, lower, or no change in the calculated specific heat. Explain.Twice as much water was used in the calorimeter than specified in the procedure.
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When you replace the helium in a balloon of fixed volume by hydrogen gas with approximately half the density of helium, the buoyant force on the balloon due to the ambient aira. remains exactly the sameb. halvesc. doublesd. quadruplese. goes to zero
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A 3.0 [V] battery powers a flashlight bulb that has a resistance of 6.0 [O]. How much charge moves through the battery in 10 [min]?
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The mean time between collisions for electrons in a gold wire is 25 fs, where 1 fs 1 femtosecond 10-^15. what is the electron drift speed in a 60 mv/m electric field?
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It is 170 cm from your eyes to your toes. You're standing 200 cm in front of a tall mirror.How far is it from your eyes to the image of your toes?
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it takes an oscillating particle 2.0 s to travel from maximum displacement to equilibrium position. what is the period of the oscillation?
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sunlight at earth's surface has a typical intensity of 735 w/m2. calculate the maximum value of its electric field.
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a typicar iron nucreus contains 30 neutrons and 26 protons. which of the forowing exprains why the nucleus stays together despite the electric repulsion between the protons?
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First, describe a strategy to find out which items are heavier than others. See how many ants it takes to lift each object (using any length).
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An L-C circuit containing an 90.0-mH inductor and a 1.70-nF capacitor oscillates with a maximum current of 0.790A .A. Calculate the maximum charge on the capacitor.B. Calculate the oscillation frequency of the circuit.C. Assuming the capacitor had its maximum charge at time t= 0, calculate the energy stored in the inductor after 2.20ms of oscillation.
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A solid sphere of mass 1.5kgand radius 15cmrolls without slipping down a 35incline that is 7.0mlong. Assume it started from rest. The moment of inertia of a sphere is given by I=25MR2.A. Calculate the linear speed of the sphere when it reaches the bottom of the incline.B. Determine the angular speed of the sphere at the bottom of the incline.C. Does the linear speed depend on the radius or mass of the sphere?D. Does the angular speed depend on the radius or mass of the sphere?
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a student drops a water balloon out of a dorm window 27 m above the ground. what is its velocity when it hits the ground? please include the correct unit.
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Calculate the first three natural frequencies of torsional vibration of a shaft of Figure 6.7 clamped at x = 0, if a disk of inertia J0 = 10 kg m2 /rad is attached to the end of the shaft at x = l. Assume that l = 0.5 m, J = 5 m4 , G = 2.5 x 109 Pa, rho = 2700 kg/m3 .
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A ceiling fan with 28-in. blades rotates at 45 rpm. (a) Find the angular speed of the fan in rad/min. 907 rad/min (b) Find the linear speed of the tips of the blades in in./min. 7916 in/min x
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what is the slope of the line tangent to the polar curve r = 22 when = ?
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find the slope of the tangent line to the given polar curve at the point specified by the value of . r = 8 cos(), = 3
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A 230-kg object and a 530-kg object are separated by 4.40 m. (a) Find the magnitude of the net gravitational force exerted by these objects on a 33.0-kg object placed midway between them. (b) At what position (other than an infinitely remote one) can the 33.0-kg object be placed so as to experience a net force of zero from the other two objects? m from the 530 kg mass toward the 230 kg mass
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When a 9-kg block is suspended from a spring, the spring is stretched a distance of 70 mm . Part A Determine the natural frequency of vibration for a 0.2-kg block attached to the same spring. Express your answer to three significant figures and include the appropriate units. Part B Determine the period of vibration for a 0.2-kg block attached to the same spring. Express your answer to three significant figures and include the appropriate units.
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