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A candle is placed 16.0 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, the image moves 6.5cm farther away from the mirror. Find the focal length of the convex mirror.
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Question: A roller coaster car is going over the top of a 12-m-radius circular rise. At the top of the hill, the passengers "feel light," with an apparent weight only 60% of their true weight. How fast is the coaster mov ...
Question: Pennies today are copper-covered zinc, but older pennies are 3.1 g of solid copper. What are the total positive charge and total negative charge in a solid copper penny that is electrically neutral?The density ...
A cogeneration power plant uses waste wood from the forest industry to generate heat and electricity for a nearby industrial park. It has a capacity to burn 80 MW of wood as thermal power. If the thermal power production ...
Question: A proton (with a rest mass m=1.67Ã-10âˆ'27kg) has a total energy that is 4.00 times its rest energy. Part A: What is the kinetic energy Ek of the proton? Express your answer in billions of electron volts to thr ...
Question: Three identical very dense masses of 5200kg each are placed on the xaxis. One mass is at x1 = -110cm , one is at the origin, and one is at x2 = 310cm . What is the magnitude of the net gravitational force Fgrav ...
Question: A parallel-plate air capacitor has a capacitance of 920 pF. The charge on each plate is 2.55 µC. (a) What is the potential difference between the plates? (b) If the charge is kept constant, what will be the po ...
Question: Situation: two electrons, each with mass m and charge q, are released from positions very far from each other. With respect to a certain reference frame, electron A has initial nonzero speed v toward electron B ...
Jimmy is trying to synchronize two clocks on the roof of two buildings. The master clock is located at (x,y,z)=(0m, 0m, 80m), the slave clock is located at ( 200m, 300m, 30m). When the master clock ticks at t=0 s, it pro ...
Question: Our sun's 5800 K surface temperature gives a peak wavelength in the middle of the visible spectrum. What is the minimum surface temperature for a star whose emission peaks at some wavelength less than 400 nm? t ...
Question: A projectile is fired with an initial speed of 30m/s at an angle of60 deg above the horizontal. The object hits the ground 7.5slater. a) How much higher or lower is the launch point relative to thepoint where t ...
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