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"Romeo tosses a pebble at Juliet's window to wake her. Unfortunately, he throws too large a pebble too fast. Justbefore crashing through the glass, the pebble is movinghorizontally, having traveled a horizontal distance x and avertical distance y as a projectile. Find the magnitude and direction of the pebble's velocity as it leaves Romeo'shand."
two charged particles, Q1=+4.60 nC and Q2=-2.50 nC, are separated by 32.0 cm. What is the eletrical potential energy of the pair
The two blocks shown above are sliding across a table pushed by a force F from the left equal to 24 N. What is the magnitude of the acceleration of the entire system
A rocket rises vertically, from rest, with an acceleration of 4.0m/s2 until it runs out of fuel at an altitude of 1400m. After this point, What maximum altitude does the rocket reach
A Carnot engine uses a hot reservoir consisting of a large amount of boiling water and a cold reservoir consisting of a large tub of ice and water. how many kilograms of ice in the tub
A coffee cup heater and a lamp are connected in parallel to the same 120-V outlet. Find the resistance of the lamp
A violin string that is 57.8 cm long has a fundamental frequency of 350 Hz. What is the speed of the waves on this string
A small bridge is constructed of a single concrete slab which has a length of 14.5 m at 21.7 °C. Calculate the change in the length of the bridge if the temperature changes to 28.7 °C
A laser beam passes through a single slit. We observe an interference pattern on a screen 9.03 m away. Find the width of the slit
Electrons are accelerated so that their de Broglie wavelength is .083nm. What is the kinetic energy of the electrons so that they have this de Broglie wavelength
A mass m hangs from a cable tied to two other cables connected to a support. find the sum of the horizontal components of the tensions
A space probe is launched from Earth, headed for deep space. At a distance of 15,000 miles from the Earth's center, What is the size of the force when it is at 30,000 miles from the Earth's center
A stone of weight W has specific gravity 1.68. When the stone is suspended from a scale and submerged in water, what is the scale reading in terms of its weight in air
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