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What is the wavelength of the 76 Hz ELT wave?
What is the wavelength of the peak of the blackbody radiation curve for the human body (T= 310K )? What is the EM wave of this?
A ray of yellow light crosses the boundary between glass and air, going from the glass into air. If the angle of incidence is 20 degrees, what is the angle of refraction?
When viewed through a magnifying glass, a stamp that is 2 cm wide appears upright and 6 cm wide. What is the magnification?
find the force necessary to start the crate moving given that the mass of the crate is 32 and the coefficient of static
A 2.4-kg block is dropped from a height of 5.0 m onto a spring of spring constant 3955 N/m. When the block is momentarily at rest, the spring has compressed by 25 cm.
The active element of a certain laser is an ordinary glass rod 19.5 cm long and 1.37 cm in diameter. Calculate its increase in volume
A small piece of dust ofmass m = 2.3 µg travels through an electric aircleaner in which the electric field is 567 N/C. The electric force on the dust particle is equal to the weight of the particle.
Write paper on The Effect Sunspots and Solar storms
A gymnast of mass 55.0 hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value for the acceleration of gravity.
An 855 kilogram sports car can drive around an unbanked turn at a maximum speed of 60 m/s without slipping. Find the maximum speed if no down force acted on the car
A 51-g handball moving with a speed of5 m/s strikes the wall at an angle of37° with the normal, and then bounces off with the same speed at the similar angle by the normal. It is in contact by the wall for 2.0 ms. what is the average force exerted by..
Global Positioning System satellites are at altitudes of about 20000 kilometer, where the acceleration of gravity is only 5.8 percent of its surface value. calculate the orbital period of the GPS satellites
The average speed of blood in the aorta is 0.294 m/s and the radius of the aorta is 1.04 cm. There are about 1.97 × 109 capillaries with an average radius of 6.09 ?m. What is the approximate average speed of the blood flow in the capillaries?
The human eye can barely detect a star whose intensity at the earth's surface is 1.6E-11W/m2. how many photons per second enter the eye from the star
A 8.85 ?C point charge is glued down on a horizontal frictionless table on the right. If is tied to a -6.65, Find the tension in the wire, What would the tension by if both charges were negative
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