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The positioin of a particle moving along the x-axis is given by x =( 21+22t-6t^2)m, where t is in s. What is the average velocity during the time interval t= 1.0 s to t = 3.0s?
A 28.4kg beam is attached to a wall with a hinge and its far end is supported by a cable. what is the horizontal component of the force exerted by the hinge on the beam
The bullet lodges in the forehead of the victim and comes to a rest. If the victim's head has a mass of 5 kg and was at rest before impact, what is the stress on the cervical vertebra
In a proton accelerator, the energy of proton is 20MeV, the diameter of the beam is 2.0mm, Find the current density and the particle density in the beam
a string stretched between two fixed ends vibrates in its second harmonic with a frequency f=2 Hz. if the velocity that links the frequency and wavelength is equal to 40 m/s, find the wavelength of the stationary wave
An object-spring system oscillates with an amplitude of 3.4 cm. If the spring constant is 210 N/m and object has a mass of 0.50 kg, obtain the maximum acceleration of the object
An automobile starter motor has an equivalent resistance of 0.0470 and is supplied by a 12.0 V battery with a 0.0120 internal resistance. What is the current to the motor
A 20 000 N truck is acted upon by the force that decreases its speed from 10.00 m/s to 5.0 m/s in 5.0 sec. What is the magnitude of force.
If the gas pressure and volume both double, what's the change in internal energy, find the internal energy of 1mol of oxygen at 291K and 1.0 atm
As light with a frequency of 4.286 x 10^14 Hz passes from air into a diamond, its speed v is 0.413 time in air is the same as the speed in vacuum which c= 3.0 x10^8, Calculate the value of wavelenghth of the light in air
A magnetic field and an electric field, in separate regions of space, have strengths of 1.25 T and 1.25 N/C, respectively. What is the energy density of the magnetic field
Ricardo and Jane are standing under a tree in the middle of a pasture. An argument ensues, and they walk away in different directions. Ricardo walks 24.0 in a direction 60.0 west of north. Jane walks 12.0 in a direction 20.0 south of west. They then ..
The astronaut throws a rock straight up with a velocity of + 16.9 m/s, What is the acceleration (magnitude and direction) due to gravity on this planet
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