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A 3.0 kg block is dragged acrossa rough horizontal surface by a constant force of 16 N acting at anangle of 37° above the horizontal as shown below. The speed ofthe block increases from 4.0 m/s to 6.0 m/s in a displacement of5.0 m. What is the work done by the frictional force during this displacement?
A football is kicked from the ground with a velocity of 38 m/s at an angle of 40 degrees and eventually lands at the same height. How far away does the ball land
Light beams A and B are depositing the same amount of energy per square meter on a surface, but the wavelength associated with beam A is longer than that associated with beam B. The photon flux (number crossing a unit area per unit time) is:
In the Bohr model, as it is known today, the electron is imagined to move in a circular orbit about a stationary proton. what would be the corresponding orbital radius
Find out the shear strain that results if a force of magnitude 5.00×105 is applied to the top square face of the plate, parallel to the side, and a force of equal magnitude is applied in the opposite direction to the bottom face of the plate as s..
The particles are as follows: 10 uC at x = 0, y = 0; -5 uC at x = 20, y = 0; -15 uC at x = 20, y = 20; What is the electric field at the center of the square
Short pulses of laser light traveling in the x-direction with a diameter of 1 mm are incident on a perfect mirror. The pulses are 10^-13 seconds long and have a repetition rate of 10 Hz, each with an energy of 1 mJ.
A 100 kg box is pulled by a rope in the direction 20 degreesabove the horizontal. The box is moving in horizontal directionwith an acceleration of 0.5m/s^2 and the coefficient of kineticfriction between the box and the horizontal surface is 0.25. Fin..
Amber (n = 1.546) is a transparent brown-yellow fossil resin. An insect, trapped and preserved within the amber, How far below the surface is the insect actually located
A Styrofoam box has a surface area of 0.74 m2 and a wall thickness of 2.0 cm. The temperature of the inner surface is 5.0°C, determine the thermal conductivity of the Styrofoam
A cooling fan is turned off when it is running at 175rpm. What was the fan's angular acceleration, assumed constant
A flat copper sheet has a hole with area 0.265 m^2 at room temperature (25 degree C). If it's heated to 510 degree C, what's the hole's new area
Suppose the ruler in procedure 3 is asymmetrical, balancing at the58.2cm mark. The ruler is now supported at the44.3cm mark, Find the mass of the ruler
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