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a child is swinging on a swing set. if the chains holding the swing are 5m long and the child is pulling back to an angle of 5 degrees from vertical, how fast will the child be moving at the lowest point in the swing?
In a ballistic pendulum experiment a 20 g bullet is shot into a 2.3 kg block of wood suspended by a cord of negligible mass. what is the approximate muzzle speed (in m/s) for the gun that fired the bullet
What is the frequency of light that has the wavelength in water of 788 nm if the refractive index for this light is 1.33.
A vertical spring with a spring constant of 480 N/m is mounted on the floor. From directly above the spring, that is unstrained, a 0.150 kg block is dropped from rest.
For lead 82Pb206 (atomic mass = 205.974440 u) obtain the mass defect in atomic mass units
An electron in an oscilloscope is accelerated as a result of the potential difference between the cathode and anode. The electron has negligible initial speed and a final speed of 2.40 107 m/s. Find the voltage drop from cathode to anode.
consider a crate at rest on a factory floor. As the pair of workers start to lift it, What happens to the support force acting on the workers feet
Positive electric charge is distributed in the shape of an infinitely long insulating cylinder of radius R and volumetric charge density ?=?0(1-r/R), Find an expression for the linear charge density
A stunt driver wants to make his car jump over eight cars parked side by side below a horizontal ramp, what is the new minimum speed
At its highest temperature, a space heater has a resistance of 15.5 ?, What is the average power output of the space heater
The voltage across a membrane forming a cell wall is 74.0 mV and the membrane is 8.80 nm thick. What is the electric field strength
Suppose a 0.250-kg ball is thrown at 15.0 m/s to a motionless person standing on ice who catches it with an outstretched arm, Calculate the final linear velocity of the person
find the coefficient of linear expansion for the material of which the rod is made.
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