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a. In what frames of reference does special relativity apply?
b. In what frames of reference must general relativity be used?
c. Describe what happens to time and length at speeds close to the speed of light.
A toy battery has an emf of 15.0 V. The terminal voltage of the battery is 11.6 V when it is delivering 20.0 W of power to an external load resistor R. What is the value of R? What is the internal resistance of the battery?
you have a telescope that has an objective lens with a diameter of 60.0 mm and has a focal length of 150.0cm. what angular resolution in radians or degrees is achieved
A person of mass 73kg stands at the center of a rotating merry-go-round platform of radius 3.5m and moment of inertia 950kg kg m^2. Calculate the rotational kinetic energy of the system of platform plus person after the person's walk
Isn't it the ratio of the water vapor pressure to the saturation water vapor pressure?
Compare directivity Dant of a 1 m diameter antenna aperture operating at 10 GHz with directivity Deye of the eye's pupil operating in the middle of the visible.
Students use a simple pendulum with a length of 36.9cm to determine the value of "g". If it takes 12.2s to complete 10 oscillations, what will be their experimental value "g"?
A magnifying glass with focal length 15 centimeters is placed 10 centimeters above a stamp. find Where is the image situated
A playground is on the flat roof of a city school, 5.2 m above the street below. Find the horizontal distance from the wall to the point
A tennis player swings her 1000 gram racket with a speed of 11.0 m/s. Find how fast is her racket moving immediately after the impact
A liquid drug, with density and viscosity slightly greater than that of water (Ï = 1100 kg/m3 , μ = 1.2 x 10-3 kg/m-s), must be administered.
A person pulls a 30kg crate to the right along a rough horizontal surface. He pulls with a force of 200N at an angle of 25 degrees from the horizontal. Find the total force on the crate
A heating element in a stove is designed to dissipate 2810 W of heat when it is connected to 200 V. Assuming that the resistance is constant, compute the current in this element if it is connected to 115 V. Compute the power the heating element dissi..
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