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Light with a wavelength of 435 nmilluminates a metal cathode. The maximum kinetic energy of the emitted electrons is 0. 71 eV. What is the longest wavelength of light that will cause electrons to be emitted from this cathode? (please show all work)
A certain type of laser emits light that has a frequency of 7.4x 1014 Hz. The light, however, occurs as a series ofshort pulses, each lasting for a time of 4.4 x 10-11 s.(a) How many wavelengths are there in one pulse?
A 0.30 kilogram toy is attached to the end of a horizontal string and rotated in a circle of radius 1.3 meter on a frictionless horizontal surface. calculate the maximum speed the toy can have
A person walks into a room and switches on the ceiling fan. The fan accelerates with constant angular acceleration for 15 s until it reaches its operating angular speed of 1.0 rotations/s after that its speed remains constant as long as the switch..
A cosmic-ray proton is moving at such a speed that it can travel from the Moon to Earth in 1.5s. At what fraction of the speed of light is the proton moving
A boat clashed on something and fell to the ocean floor, a few years later a few researchers sent a robot and found out that the pressure at the same level as the boat was 413 atm. The density of the seawater was 1025 kg/m cubed. what is the depht of..
A 3.0 µF capacitor has acapacitive reactance of 1.0 k. What is the frequency of the applied voltage?
In a dentist's office, an X-ray of a tooth is taken using X-rays that have a frequency of 8.07 multiply.gif 1018 Hz
the block diagram of the control of an electric heating system. the heater is driven from a voltage-controlled power
The altitude of a hang glider is increasing at a rate of 6.61 m/s. At the same time, the shadow of the glider moves along the ground at a speed of 16.2 m/s when the sun is directly overhead. Compute the magnitude of the glider's velocity.
A concave mirror (R = 56.0 cm) is used to project atransparent slide onto a wall. The slide is located at a distanceof 40.0 cm from the mirror, and a smallflashlight shines light through the slide and onto the mirror. Thesetup is similar to that i..
a football is kicked at ground level with a speed of 16.6ms at an angle of 42.9 to the horizontal. how much later does
Two capacitors, C1 = 4.00 µF and C2 = 13.0 µF, are connected in parallel, and the resulting combination is connected to a 9.00-V battery. Find the equivalent capacitance of the combination
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