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An horizontal force of 30 N is being applied to a 5 kg block causing it to accelerate up a frictionless surface which is at an incline of 30 degrees. What is the normal force on the block? What is the magnitude and direction of the acceleration of the block?
a 4 m string is held fixed at both ends. when driven by 108 Hzsource, the string vibrates in 4 distinct segments. What is the natural fundamental frequency of the string
question1a 68.0-kg person throws a 0.0490-kg snowball forward with a ground speed of 32.0 ms. a second person with a
A standing wave on a string fixed at both ends has three antinodes. The string is 85.0 cm long. What is the wavelength of this standing wave
at a concert you sit 12 m directly in front of one of the two speakers on the front of the stage. the other speaker is
A portable electric heater is powered by a 45 V battery. Ithas four identical heating elements inside, wired in series. If acurrent of 14 A runs through them when the heateris turned on, what is the resistance of each heating element?
youve decided to install a pipe organ in your living room. unfortunately your ceiling is only 3.1m high. to reach the
A steel ball with a mass of 32.0g is dropped from a height of 2.10m onto a horizontal steel slab. The ball rebounds to a height of 1.50m. find the average force on the ball during the impact
Estimate the phase difference between the sounds received by your ears when you are facing 90° away from the direction of the source
An 18.00 g rifle bullet travelling 250 m/s buries itself in a 3.6 kg pendulum hanging on a 2.8 m long string, which makes the pendulum swing upward in an arc. Determine the horizontal component of the pendulum's displacement.
A cryogenic storage container holds liquid helium, which boils at 4.2 K. Suppose a student painted the outer shell of the container black, turning it into a pseudo-blackbody, and that the shell has an effective area of 0.40 m2 and is at 3.3 102 K.
Estimate the radiation pressure due to a 100 W bulb at a distance of 8.0 cm from the center of the bulb
Two large, parallel, conducting plates are 17 cm apart and have charges of equal magnitude and opposite sign on their facing surfaces, Find the electric field at the position of the electron
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