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A certain black body radiates 1200 W at a temperature of 2000 K. how much power does this body radiate at 3000 K
The function y(x,t) = (27.0cm)cos(pix-22pit) with x in meters and t in seconds, What is the transverse speed for a point on the string at an instant when that point has the displacement y = +24.0 cm
A particle has a charge of +3.1 ?C and moves from point A to point B, a distance of 0.28 m. Find the magnitude of the electric force that acts on the particle
A capacitor with an initial potential difference of 100 V is discharged through a resistor when a switch between them is closed at t = 0. At t = 10.0 s, What is the time constant of the circuit
The energy density of radiation is 5.75E-14 j/m^3. The speed of light is 2.99E8 m/s, Determine the the corresponding electric field amplitude
The amplitude of an electric field is 0.4 v/m 23 km from a radio transmitter. What is the total power emitted by the transmitter
A crane drops a 1.0 kg steel ball onto a steel plate. The balls speed just before impact is 2.0m/s. what is the bounce back speed right after the impact
A 49g marble moving at 1.9m/s strikes a 24g marble at rest. What is the speed of the first marble immediately after the collision
Two adjacent resonant frequencies of an organ pipe are found to be 500 Hz and 600 Hz. What is the length of the pipe
A steel wire on a guitar has a length of 0.500 m and a mass of 3.50 x 10^-3 kg. To what tension must the wire be tightened
The howler monkey is the loudest land animal and can be heard upto a distance of 2.5 km. The acoustic power emitted by the howler, in mW is
A police car is moving towards you at a speed of 36.0 m/s. Its siren produces a frequency of 850 Hz. What frequency do you hear after it passes by you
Thunder is heard 4.0 sec after the flash of lightning is observed. If the outside temperature is 15 degrees celsius, how far away was the lightning bolt
the top of a pool table is 0.770 m from the floor. the placement of the tape is such that 0 m aligns to the edge of the table. calculate his break shot speed
A wire is 1.50 m long and has a diameter of 1.50 mm. The tensile modulus of the wire is 6.20 x 1010 N/m2. what is the increase in length of the wire
Two balls of identical mass of 0.151 kg and with identical charges placed on them hang from the ceiling on identical strings of lengths 1.510 m, what is the charge on each ball
A hydraulic lift is used to jack a 970 kg car 12 cm off the floor. The diameter of the output piston is 18 cm, and the input force is 250 N. What is the area of the input piston
A scuba diver and her gear displace a volume of 65 L and have a total mass of 68 kg. Will the diver sink or float
What is the total force and the absolute pressure on the bottom of a swimming pool 22m by 8.5 m whose uniform depth is 2 m
A potter is shaping a bowl on a potter's wheel rotating at constant angular speed. The friction force between her hands and the clay is 1.5 N total. How large is her torque on the wheel
A person of mass 75 kg stands at the center of a rotating merry-go-round platform of radius 3 m, Calculate the rotational kinetic energy of the system of platform plus person before and after the pers
A 70 cm diameter wheel accelerates uniformly about its center from 130 rpm to 280 rpm in 4 s. Determine its angular acceleration
What is the linear speed of a point on the equator, and on the Arctic Circle (latitude 66.5 degrees) and (c) at latitude of 45 N, due to the earth's rotation
A balloon is rubbed with a wool glove. The two items attract one another with a force of strength 0.6 N, How many electrons were transferred
In order to determine the mass of a molecule, first an electron is removed from the molecule. The resulting ion is accelerated from rest by an electric potential difference 2.7 104 V, Find the mass