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A small block with mass .250kg is attacked to a string passing through a hole in a frictionless, horizontal surface. The block is originally revolving in a circle with a radius of .800m about the hole with a tangential speed of 4.00m/s. The string is then pulled slowly from below , shortening the radius of the circle in which the block revolves. The breaking strength of the string is 3.00 N. What is the radius of the circle when the string breaks?
two long parallel wires separated by a distance d each carry a constant electric current i. find an expression for the
Two people are pulling a mule, assume the F1 is 110 N and F2 is80 N. I found the single force that is equivalent to the two forcesfor magnitude and direction but I need to find out the force that a third person would have to exert on the mule to make..
A speeding motorist traveling 100km/h passes a stationary police officer. The officer immediately begins pursuit at a constant acceleration of 12km/h/s (note the mixed units).
two resistors connected in series with each other and a 17 v battery are connected in a loop. the voltage drop across
If the electrons gain this energy by collision between hydrogen atoms in a high temperature gas, calculate the minimum temperature of the heated hydrogen gas
A father (m = 90 kg) and son (m = 45 kg) are standing facing each other on a frozen pond. The son pushes on the father and finds himself moving backward at 3 m/s after they have separated. How fast is the father moving.
A thin cable 2m long with a mass of 100g is fixed at both ends. Its tension is 20N. What is the frequency of this mode of vibration
One of the 57.5cm -long strings of an ordinary guitar is tuned to produce the note B3(frequency 245 Hz) when vibrating in its fundamental mode. Find the speed of transverse waves on this string
What focal length objective lens is required for a 3 meter length telescope which uses a 4 Power eyepiece? Is the final image real
A converging lens of focal length 0.25 m forms a virtual image of an object, What is the distance between the object and the lens
a proton is placed at rest near the positive side of two oppositely charged parallel plates. there is a potential
Two 4.0-g spheres are suspended by 8.0-cm-long light strings (see the figure). A uniform electric field is applied in the x-direction. determine the electric field intensity
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