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A 20.0 kg floodlight in a park is supported at the end of a horizontal beam of mass 20.0 kg and length L that is hinged to a pole (beam and pole are perpendicular). A cable at an angle of 30.0 degrees with the beam helps to support the light.
a) Find the tension in the cable.
b) Find the horizontal and vertical forces exerted by the beam on the pole.
You are running an experiment that uses an accelerator that produces a 3.50-µA proton beam. Find the amount of energy delivered to the target each second
Is it possible for an electric field to exist at some point in space at which there is no charge? Please explain specifically.
Mars is 2.28 x 1011 m from the sun (on average). At what minimum speed would it escape from the sun completely
A 1350 kg car accelerates uniformly from 35.5 km/h to 75.5 km/h over 250 m. Determine the time taken for the car to accelerate
A typical red blood cell subtends an angle of only 1.7×10?5rad when viewed at a person's near-point distance of 25 cm. find the magnitude of the angle subtended by the red blood cell
Three polarizing plates whose planes are parallel are centered on a common axis. The directions of the transmission axes relative to common vertical direction.
A particular ion of carbon is composed of 6 protons, 7 neutrons, and 4 electrons in terms of elementary charge e. What is the total charge of this ion
A typical helium-neon laser found in supermarket checkout scanners emits 633-nm-wavelength light in a 1.1mm diameter beam with a power of 1.4mW. What is the amplitude of the oscillating electric field in the laser beam
two identical 21.6-kg spheres of radius 14 cm are 29.8 cm apart center-to-center distance.a if they are released from
The Lyman series results from transitions of the electron in hydrogen in which the electron ends at the n=1 energy level. calculate the wavelengths of the photons emitted in the transitions from the energy states
A chain of length L and total mass M is released from restwith its lower end just touching the top of a table. Find the force exerted by the table on the chain
A car uniformly decelerates at a rate of -5.00 m/s^2. How far does the car travel after 1.5 seconds if it initially was moving at a speed of 25 m/s
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