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A 40kg child standing on a frozen pond throws a 0.5kg stone to theeast with a speed of 5m/s. Neglecting friction between the childand the ice, what is the recoil velocity of the child?
a body of 2kg is suspended from the ceiling of an elecator moving up with an accelration g. find the apparant weight of
A pulsed carbon dioxide laser has an energy output of 1.00 J. This energy is released in the form of a 10^9 W pulse of infrared radiation lasting 10^-9 s, Find the equivalent capacitance of the network
Two identical conducting spheres are separated by a fixed center to center distance of 45 cm and have different charges, Find the inital charge on the spheres
An electromagnetic wave in a vacuum has a magnetic field with a magnitude of 1.29 × 10-6 T. What is the intensity S of the wave
An sub with a mass of 1800 kg is traveling eastbound at 17 m/swhile a compact car with mass of 900 kg is traveling westbound witha speed of 15 m/s the cars collide head-on becoming entangled.
A 5.00-g bullet, traveling horizontally with a velocity of magnitude 360 m/s, is fired into a wooden block with mass 0.800 kg, initially at rest on a level surface. What is the decrease in kinetic energy of the bullet
A shopper in a supermarket pushes a cart with a force of 33 N directed at an angle of 25° below the horizontal. Find the work done by the shopper as she moves down a 44 m length aisle
the pressure p in kilopascals volume v in liters and temperature in kelvins of a mole of an ideal gas are related by
Based on EPA estimated carbon credits value of $70 per metric ton of carbon in 2050, estimate the financial value of the carbon market for the coal-fired electricity system in the US. Briefly put that dollar value in perspective.
A transverse wave of wavelenght 0.50m travels along a rope. If the frequency of the wave is 40.0Hz, what is the speed of propagation of the wave
The blades in a blender rotate at a rate of 6900rpm. What is the angular acceleration as the blades slow down
In fair weather, over flat ground, there may be a downward electric field of 155 N/C. Calculate the charge density of the air
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