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A uniform beam of negligible weight is supported by a cable. The beam is pivoted at the bottom and a 2000-N object hangs from its top. Find the magnitude of the tension T in the cable.
If I have light of three different frequencies, 9.2x10^14 Hz; 6.7x10^14 Hz; 4.7x10^14 Hz that is shined on a metal surface with the observations for each frequency labled A,B, and C as follows:
In special conditions, it is possible to measure the energy of a gamma-ray photon to 1 part in 10^15. For a photon energy of of 50 keV, estimate the maximum lifetime that could be determined by a direct measurement of the spread of the photon energy.
An electron is confined to a region of space of the size of an atom (0.1 nm). What is the uncertainty in the momentum of the electron? What is the kinetic energy of an electron with a momentum equal to deltaP ?
Gamma rays can be produced through electrons oscillating in wires of electric circuits. The Earth's atmosphere is quite transparent to infrared radiation. A vertical automobile antenna is sensitive to electric fields polarized horizontally. Visible l..
The corporation reports net income of $6,000 for the year, excluding any effect of the distributions. Determine the basis in A and B's shares and the balance in the corporation's AAA at the end of the year.
An astronaut is being tested in a centrifuge. The centrifuge has a radius of 7 m and, in starting, rotates according to ? = 0.30t2, When t = 5.0 s, what is the magnitude of the astronaut's linear speed
The index of refraction for red light in water is 1.331 and that for blue light is 1.340. A ray of white light enters the water at an angle of incidence of 80.4°. What is the underwater angle of refraction for the red component of the light?
A baseball (mass = 140 g) is pitched so that it crosses home plate with a speed of 92.0 mph at an angle of 18.4degree below the horizontal. find the impulse delivered to the ball by the bat
Agriculture and forestry for food and fuels, space heating of large and small buildings, water heating, and heating for drying and many other processes are current and potential applications of solar energy.
An asteroid is in a nearly circular orbit of radius 5.219 AU about the Sun. Determine the period of this asteroid
A railroad car of mass 2.00 x 10^4 kg moving at 3.00 m/s collides and couples with two coupled railroad cars, What is the speed of the three coupled cars after the collision
A capacitor has a very large capacitance of 10 F. The capacitor is charged by placing a potential difference of 2V between its plates. How much energy is stored in the capacitor
A certain light source is found to emit radiation whose peak value has a frequency of 8.28 Ã- 1014 Hz. Find the temperature of the source
If the projectile rises to a maximum height of only 10.2 m, identify the magnitude of the average force due to air resistance.
If air drag is negligibly small, how fast is sequoia cone moving while it reaches the ground if it dropped from the top of a 114 tree.
The angular momentum of a spinning wheel is 230 kg · m2/s. After application of a constant braking torque for 2.2 s, What is the torque applied
A vibration platform oscillates up and down with an amplitude of 9.2 cm at a controlled variable frequency. At what frequency will the rock just begin to leave the surface
An appliance mover is pulling a 300 lb stove across the floor by placing it on a piece of carpet and pulling at a 45 degree angle. how much force is necessary to get it moving
A 47 kg person, standing 0.980 m from the axis, begins to run on the disk in a circular path and has a tangential speed of 3.10 m/s relative to the ground. Find resulting angular speed (in rad/s) of the disk.
An infinitely long line of charge has a linear charge density of 5.00×10^?12 C/m. A proton is at distance 12.0 cm from the line and is moving directly toward the line with speed 1500 m/s. How close does the proton get to the line of charge?
Determine the vertical component. when would a microphone at the other end first detect a disturbance.
One solenoid is centered inside another. The outer one has a length of 46.0cm and contains 6600 coils, Find the emf induced in the inner solenoid
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