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Explain why the color temperatures of the sun in bright sunlight and in the shade are different, even though the sun did not change temperature. What are the physical causes of this difference, and which is a better estimate for the sun's temperature?
The meaning and the basic applications of Newton's 1st and 2nd laws.
At t = 0, an automobile traveling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 10.3 m until, at t = 1.30 s, Find the change in its velocity during the turn
A spherical balloon has a radius of 6.75m and is filled with helium. The density of helium is 0.179 kg/m3, and the density of air is 1.29 kg/m3. Determine the largest mass of cargo the balloon can lift
At t=0, a 734 g mass at rest on the end of a horizontal spring (k= 113N/m) is struck by a hammer, Determine the amplitude, maximum acceleration and total energy
A 27.0-kg child on a 3.00-m-long swing is released from rest when the ropes of the swing make an angle of 35.0° with the vertical, Neglecting friction, find the child's speed at the lowest position
Examine that, for gold, the volume of water displaced will be 51.8 cubic centimeters.
A rope with 300 g of mass per meter is under 580 N tension. A wave with frequency 3.1 Hz and amplitude 6.5 cm is propagating on the rope
A uniform electric field of magnitude 445 N/C pointing in the positive x-direction acts on an electron, that is initially at rest. The electron has moved 3.10 cm.
Two identical spheres are made of conducting material. Initially, sphere 1 has a net charge of 33Q and sphere 2 has a net charge of -18 Q
A typical laboratory centrifuge rotates at 4000 rpm. Test tubes have to be placed into a centrifuge very carefully because of the very large accelerations. What is the acceleration at the end of a test tube that is 10 cm from the axis of rotation
What centripetal force does an 80-kg passenger experience when seated 12 m from the center of the Ferris wheel whose angular speed is 0.50 rad/s.
A converging lens of focal length 39 cm is placed next to a converging lens of length 55 cm. What is the effective focal length for this combination
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