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The work function for copper is 4.70 eV.
(a) Find the cutoff wavelength for copper.
nm
(b) What is the lowest frequency of light incident on copper that releases photoelectrons from its surface?
Hz
(c) If photons of energy 5.73 eV are incident on copper, what is the maximum kinetic energy of the ejected photoelectrons?
eV
When the front of the train passes the worker. A 1500 kg car moving north at 27.0 m/s is struck by a 2165-kg car moving east at 18.0 m/s. The cars are stuck together. How fast and in what direction do they move immediately after the collision.
The sound intensity level of a jet plane going down the runway as observed from a certain location is 105 dB
an equeous solution contaning 0.003 M NaCl and 0.005 M CaCl2 is mixed with the polysacharide alingate to creat aahigh- viscosity liquid, calculate the activity coefficient of all ionic species at 25 C
A steam catapult launches a jet aircraft from the aircraft carrier John C. Stennis, giving it a speed of 210 mi/h in 3.00 s. Find the average acceleration of the plane
Radioactive decay of granite and other rocks in the Earth's interior provides sufficient energy to keep the interior molten, heat lava, and supply warmth to natural hot springs.
Suppose the solenoid filled with a paramagnetic substance such as liquid oxygen. Qualitatively,how will this change your your answer to Part (b)? Will your reply increase, decrease,or remain the same.
If a disco disk is rotating with a person on it on the outer side, then if he moves inside (towards the center), the angular velocity will change-How will the energy be conserved.
Cheetahs, fastest of the great cats, can reach 45 in 2 starting from rest. Assume that they have constant acceleration throughout that time, find their acceleration (in (a) and (b) ) and the distance (in (c) and (d) ) Q2. They travel during that t..
how much work is required to accelerate a proton from rest up to a speed of 0.957c, what would be the momentum of this proton
Find the resistance between points A and B. A car starts from rest on a curve with a radius of 130 m and accelerates at 0.500 m/s^2. How many revolutions will the car have gone through as the magnitude of its total acceleration is 2.50 m/s^2.
A ship sets out to sail to a point 197 km due north. An unexpected storm blows the ship to a point 107 km due east of its starting point. In what direction must it now sail to reach its original destination.
A 2000kg vehicle is travelling down the road at 20m/s (45 mph) when it reaches an intersection. Between rubber and dry asphalt, the coefficient of friction is 0.80. What is the minimum distance necessary for the car to stop.
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