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Calculate the heat needed at 0 degrees celcius to make the following change of state: kilocalories to melt 140 g of water. (hint) the answer will have 2 SF and if it has trailing zeros write in scientific notation
How much energy is stored by the electric field between two square plates, 6.0cm on a side, separated by a 1.0mm air gap
A 65kg person throws a 0.0410 kg snowball forward with a ground speed of 28.0 m/s. A second person, with a mass of 60kg, catches the snowball. Both people are on skates.
A small-scale steame engine operates between the temperatures 20oC and and 300oC, Calculate the efficiency of the Rankine cycle
A sample of an ideal gas is at a temperature of 320 K. The rmsmolecular speed at this temperature is measured as 1631 m/s. Calculate the mass of a molecule of this gas.
The temperature of a silver bar rises by 10.0°C when it absorbs 1.23 kJ of energy by heat is 525 grams. determine the specific heat of silver
An occupant of a car has a chance of surviving a crash if the deceleration all through the crash is not more than 30.00 g. Approximation the force on a 72 kg person decelerating at this rate.
In the days before compact discs and MP3 players (ancient history!), music was recorded in scratches in the surface of vinyl-coated disks called records. Find the centripetal acceleration of a point on the edge of the record
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
In the figure below, a nonconducting rod of length L = 8.50 cm has charge -q = -4.32 fC uniformly distributed along its length. What is the linear charge density of the rod?
q1. a .800 kg block is attached to a spring with spring constant 16.0 nm. while the block is sitting at rest a student
A rollercoaster car has a mass of 600 kg when fully loaded with passengers. what is the force of the track on the car at the top of the hill
Consider a thin, uniform rod of mass m and length L (and negligible other dimensions) lying on the x axis (from x=-L to 0). Derive a formula for the gravitational ?eld “g” at any arbitrary point x to the right of the origin (but still on the x-axi..
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