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At a certain location, the horizontal component of the earth's magnetic field is 2.2 x 10-5 T, due north. A proton moves eastward with just the right speed, so the magnetic force on it balances its weight. Find the speed of the proton.
A 5 cm tall object is placed 20 cm to the left of a converging lens with focal length of 10 cm. What is the magnification of the image
A cannon fires up at an angle 60 degrees above horizontal with a muzzle velocity of 60 m/s. What is the speed at the top of the cannonballs trajectory?
A toaster rated at 1055 W operates on a120 V household circuit and a 4.00 m length of Nichrome wire as itsheating element. The operating temperature of this element is304°C. What is the cross-sectionalarea of the wire?
On a workday the average decibel level of a busy street is 72.0 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 50 every minute on a weekend, what is the decibel level of street.
A concave shaving mirror has a radius of curvature of27.0 cm. It is positioned so that the(upright) image of a man's face is 3.50 times the size of the face. How far is the mirror from the face
Starting from rest, a basketball rolls from the top of a hill to the bottom, reaching a translational speed of 2.36 m/s. What is the height of the hill
In recent years, a number of nearby stars have been found to possess planets. Find the mass of the star
a certain part of the electromagnetic spectrum ranges from 200 nm to 400 nm. what is the highest frequency associated
A stick of uniform density with mass M = 8 kg and lengthL = 0.7 m is pivoted about an axle which is perpendicularto its length and located 0.15 m from one end. Ignore any friction between the stick and the axle.
A source delivers an AC voltage of the form ?v = 96.2 sin (66?t), obtain the frequency of the source
At a certain location, the Earth's magnetic field has a magnitude of 5.8×10?5T, Find the magnitude of the magnetic flux through the top of a desk at this location that measures 140cm by 90
Using Newtons law of gravitational force Find the magnitude of the gravitational exerted by one mass on the other
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