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two forces act at an angle of 120°.the bigger force is of 40N and the resultant is perpendicular to the smaller one find the smallerforce?
An electron is accelerated to a speed where its total energy is 187 times larger than its rest energy. What is the speed of the electron in terms of the speed of light
A 5.0 megawatt windmill has three 45 m-long blades that can be approximately viewed as straight rods. If the rotational speed of the rods is 6 rpm, what is the mass of each rod
Determine the tangetial and centripetal components of the netforce exerted on the car when its speed is 15 m/s. The car's massis 1100 kg
The right-side rearview mirror of Mike's car says that objects in the mirror are closer than they appear. What is the focal length of the rearview mirror
A golf ball of mass 0.045 kg is hit off the tee at a speed of 36m/s . The golf club was in contact with the ball for 3.90×10?3s. Find the average force exerted on the ball by the golf club
What is the minimum photon energy needed to create an electron - positron pair when a photon collides (a) with a free electron at rest and (b) with a free proton at rest?
the electric field just above the surface of the charged drum of a photocopying machine has a magnitude e of 2.3 times
A mass of 0.62 kg, attached to a spring with a spring constant of 55 N/m, is set into simple harmonic motion. What is the magnitude of the acceleration of the mass
A tuning fork of unknown frequency makes 4 beats per second with a standard fork of frequency 448 Hz. What is the frequency of this fork
A bullet of mass 0.0025 kg moving at 581 m/s impacts a large fixed block of wood and travels 5.40 cm before coming to rest.
An electromagnetic wave of intensity 210 W/m2 is incident normally on a rectangular black card with sides of 25 cm and 39 cm that absorbs all the radiation. Discover the force exerted on the card by the radiation. Discover the force exerted by the sa..
A 6-m-long pole AB is placed in a hole and is guyed by three cables. Knowing that the tensions in cables BD and BE are 442 N and 322 N, respectively, determine
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