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A pendulum consists of a mass hanging from a string of length 1.0 mattached to the ceiling. Suppose that this pendulum isinitially held at an angle of 30o with the vertical (seeFigure) and then released. What is the speed with which the mass swings through its lowest point? At what angle will the mass have one-half of this speed?
A ray of light is incident on a flat mirror at an angle?. If we then rotate the mirror by 10° while keeping the incident ray fixed, by what angle will we rotate the reflected ray
A virtual object is located to the right of a diverging lens whose focal length is -f cm. Find the distance of the image of the virtual object measured with respect to the the lens
During a particular car crash, it takes just 0.18s for the car to come to a complete stop from 50 km h -1. At what rate is the car accelerating during the crash
A small button placed on a horizontal rotating platform with diameter 0.324m will revolve with the platform when it is brought up to a rotational speed of 42.0rev/min , provided the button is a distance no more than 0.142m from the axis. Part A Wh..
As observed from Earth, the wavelength of Hβ in the spectrum of the star Megrez in the Big Dipper is 486.112 nm. Laboratory measurements demonstrate that the normal wavelength of this spectral line is 486.133 nm. Is the star coming toward us or mo..
q1. fuel aboard a rocket has a density of 2770 kgm3 and is ejected with a speed of 3270 ms. if the engine is to provide
Two resistors (connected in series with each other) and a 18 Vbattery are connected in a loop. The voltage drop across the firstresistor is 7 V. What is the voltage drop across the secondresistor?
A light ray enters a rectangular glass slab (n = 1.5) at point A at an incident angle theta, what is the index of refraction of the unknown liquid
A rope 2.0-m-long has a mass of 0.100 kg. The tension is 65 N. calculate the frequency of the oscillator
During a lunar eclipse, the moon, earth, and sun all lie on the same line, with the Earth between the Moon and the sun. Calculate the force exerted on the Earth by the moon
Two hockey players strike a puck of mass 0.169 kg with their sticks simultaneously, exerting forces of 1.25 103 N, Find the instantaneous acceleration of the puck
A 42.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 1.28*10^2 m/s from the top of a cliff 140 m above level ground, What is the initial total mechanical energy of the projectile
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