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A rock is thrown directly upward 56.3 meters off a roof and misses the roof on the way back. It strikes the ground 4 seconds later. Neglecting air resistance, what was the speed of the rock?
Heat engines take input energy in the form of heat, use some of that energy to do work, What is the magnitude of the internal energy that the athlete uses in order to do 9.7x104 J of work
Light of wavelength 589 nm is incident on a single slit that is 0.720mm wide, and the resulting diffraction pattern is observed on a screen 2.00m away. What is the distance between the two dark fringes on either side of the central bright fringe
A rectangular block of wood, 10 cm*15 cm*40 cm, has a specific gravity of 0.6. What fraction of the block is submerged
a capacitor with a capacitive reactance of is connected in series with a 100 resistor across in ac source of frequency 60.0hz. what is the phase angle
A star is about 6.00 light years from Earth. How long would the trip take according to an Earth based observer
q1. a school bus takes 0.89 h to reach the school from your house. if an average velocity of the bus is 21.1 kmh to the
A wheel of radius 1.5m rotates at a constant angular velocity. A point at the edge of the wheel experiences centripetal acceleration of 1.2m/s^2. What is the linear speed of that point
Perhaps to confuse a predator, some tropical beetles are colored byoptical interference that is due to scales whose alignment forms adiffraction grating, What is the grating spacing of the beetle
An object, 0.75 cm tall, is placed 12.0 cm to the left of a diverging lens (f = -8.00 cm). determine the focal length of the converging lens
A 5.1 g marble is fired vertically upwardusing a spring gun. The spring must be compressed 8.0 cm if themarble is to just reach a target 13 mabove the marble's position on the compressed spring.
Consider a uniformly solid hemisphere of radius R and mass M. Determine the center of mass. Determine the principal axes and principal moments of inertia.
A log of mass 40 kg is dropped into river at 0°C. If the relative density of the log is 0.8, what will be the volume of the log above the surface
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