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A worker on the roof of a house deops his 0.26 kg hammer, which slides down the roof at constant speed of 7.46 m/s. The roof makes an angle of 19 dergee with the horizontal, and its lowest point is 23.2 m from the ground. What is the horizontal distance traveled by the hammer from the time it leaves the roof to the time it hits the ground? The acceleration of gavety is 9.8m/s square.
The howler monkey is the loudest land animal and, under some circumstances, can be heard up to a distance of 8.9 km, What is the ratio of the acoustic intensity produced by the juvenile howler to the reference intensity
q1. light passes through a 230 linesmm grating and is observed on a 1.0m wide screen located 1.3m behind the grating.
question1consider an array of parallel wires with uniform spacing of 1.30 cm between centers. in air at 20.0degc
A spherical ball of charge has radius R and total charge Q. The electric field strength inside the ball(r?R) is E(r)=Emax(r4/R4). Find an expression for the volume charge density ?(r) inside the ball as a function of r
A 2.9-kg toy locomotive is pulling a 1.7-kg caboose. The frictional force of the track on the caboose is 0.54 N backward along the track. If the train is accelerating forward is 2.6 m/s2, what is the magnitude of the force exerted by the locomotive o..
q1. two 18 cm diameter charged disks face each other 25 cm apart. both disks are charged to - 30 nc. what is the
A raft has a surface area of 100m^2 and a height of 10.0cm. If it is constructed of yellow pine and floating in a lake, calculate how much of the raft will be above the waterline
Consider the following situation: you fire a tennis ball off theroof of a building of height h, with initial velocity magnitudev0 and angle θ. Show that the final velocitymagnitude with which the ball hits the ground is independent ofθ.
Near the South Pole, a supply plane going at 120 mph drops a 60 kg supply package into a sled that was initially at rest. Estimate the mass of the sled
A conveyor belt is moving horizontally with a constant speed of 7 m/s (wrt earth). What is displacement of the bag (wrt earth) by the time it reaches the speed of the belt
A three level laser has energy levels E 1=1.50 eV, E 2=3.50 eV, and E 3=5.50 eV. Level E 2 is the metastable state. What is the lasing wavelength
An uncharged 4.70*10^-6 F capacitor and an 8.00 *10^5 Omega resistor are placed in series with a 12.0 V battery. find the Maximum Current through the curcuit after the switch is closed
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