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Electrons are ejected with a maximum velocity of 5.1 x 105 m/s from a metal when illuminated by photons with a wavelength of 440 nm. Calculate:
a. The energy of the incident photons.
b. The work function of the metal.
c. The longest wavelength of light which will result in electron emission.
Assuming it possible to travel at 0.95 c to a star at a proper distance of 100 light years from earth, calculate the following:
a. how long the trip to the star would take from the perspective of the traveler.
b. the distance between the earth and the star from the perspective of the traveler.
A 2.10 sound wave travels through a pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward sound receiver as the heart beats. The reflected sound is then mixed with the transmitted soun..
A ray of light passes from air through dense flint glass and then back into air. How far is the ray displaced as a result of traveling through the glass
Given a uniform ring of charge, with charge q=+30E-6 C and radius 0.2 m. Find the magnitude of linear charge density for the ring
Three positive charges are fixed in place. Q 1= +4.0 nC and is located at (0,2), Q2= +1.0 nC and is located at (0,-1), What is the electric potential at the origin
David is driving a steady 25 m/s when he passes Tina, who is sitting in her car at rest. Tina begins to accelerate at a steady 2.8 m/s^2 at the instant when David passes.
Two wheels have the same mass and radius of 4.5 kg and 0.39 m, respectively. determine the net external torque that acts on each wheel
A 600 Hz sound wave travels through a gas. If the wavelength of the sound is 0.4 m, what is the speed of sound in the gas
If a spaceship is approaching the earth at 0.24c, what is the speed of the capsule relative to the ship
An 11g bullet is fired into an 11kg wood block that is at rest on the wood table. The block, with the bullet embedded, slides 5.11 across the table. The coefficient of kinetic friction for wood sliding on wood is 0.25.
With what minimum speed must you toss a 100 g ball II str aig ht up to just barely hit the I O-m-high ceiling of the gymnasium, With what speed does the ball hit the floor
A 87 g arrow is fired from a bow whose string exerts an average force of 105 N on the arrow over a distance of 76 cm. Illustrate what is the speed of the arrow as it leaves the bow?
A heat engine extracts 50.0kJ of heat from the hot reservoir each cycle and exhausts 35.0kJ of heat. What is the thermal efficiency
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