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A 300g ball is tied to a string. It is pulled to an angle of 4.00 degrees and released to swing as a pendulum. A student with a stopwatch finds that 8.0 oscillations take 14.0s. How long is the string? answer in cm.
A tennis player places a 40 kg ball machine on a frictionless surface, as shown below. The machine fires a 0.052 kg tennis ball horizontally with a velocity of 30.6 m/s toward the north. What will be the final velocity of the machine.
A 250, 35-cm-diameter turntable rotates on frictionless bearings at 60. A 25 block sits at the center of the turntable. A compressed spring shoots the block thoroughly outward next to a frictionless groove in the surface of the turntable.
Two positive point charges, each of which has a charge of 4.3E-9 are located at y=+.10m and y+-.10m, What is the direction of this force
The air-conditioning system of a department store is designed to maintain a pressure of 0.22 in. find the net force due to pressure on a rectangular display window
A rocket of total mass 3180 KG is travelling in outer space with a velocity of 115 m/s. To alter its course by 35.0°, how much mass must be expelled
Two circular loops are centered on the x-axis parallel to the yz-plane. The smaller loop is stationary with radius r=0.02m, and resistance R=0.003Ohms. The larger loop has radius, s=0.2m, carries current I=1.5A, and moves towards the smaller loop ..
A 22.5-mW laser beam of diameter 1.98 mm is reflected at normal incidence by a perfectly reflecting mirror. Calculate the radiation pressure on the mirror
Graphically determine the resultant of the following three vector displacements: (a) 34m, 25 degrees north of east ;(b) 48m, 33 degrees east of north; and (c) 22m, 56 degrees west of south.
at its hot reservoir at 135 degrees Celsius and has a thermal efficiency of 22.0%. How much heat does the engine waste per cycle
An isolated conductor of arbitrary shape has a net charge of+1.00×10-5 C. Inside the conductor is acavity within which is a point charge q =+2.50×10-6 C. What is the charge on the cavity wall
7.5 mol of helium are in a 15 L cylinder. The pressure gauge on the cylinder reads 68 psi. estimate the average kinetic energy of a helium atom
he boat continues for an additional 5.90 s with an acceleration of +0.518 m/s2. Following this, the boat accelerates at -1.49 m/s2 for 8.05 s. What is the velocity of the boat at t = 21.35 s? Find out the total displacement of the boat?
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