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34g of copper pellets are removed from a 300 degrees celcius oven and immediately dropped into 70mL of water at 22 degrees celcius in an insulated cup. What will the new water temperature be?
A 50 kg uniform disc with a radius 1.5 is accelerated from rest to angular speed 3.5 rad/s; how much work is required to achieve this
Light of wavelength 659.4 nm is emitted by a star. The wavelength of this light as measured on Earth is 661.4 nm. How fast is the star moving with respect to Earth
A 5?, 10?, and 15? resistor are connected in parallel and the combination connected in parallel to a 15 V battery with negligible resistance. What is the current through the battery
an 15.0-kg box is released on a 35.0 incline and accelerates down the incline at 0.290m/s^2, Find the friction force impeding its motion
What is the gravitational potential energy of an interstellar cloud, with a density of 1000 H2 molecules/cm3, and radius of 10 pc
A 4.22 box sits at rest at the bottom of a ramp that is 7.74 long and that is inclined at 40.0 above the horizontal. The coefficient of kinetic friction is 0.40, and the coefficient of static friction is 0.50.
A mass m = 14 kg is pulled along a horizontal floor, with a coefficient of kinetic friction ?k = 0.09, for a distance d = 7.9 m. What is the work done by tension before the block gets to the incline
After 6 L of solvent have passed through the column, the yellow band still has not traveled down the column appreciably. What should be done to make this experiment work better
Find the focal length of a concave mirror if an object 12cm from the mirror has a virtual image 2.1 times the object's actual size
A person pushes a 16.0 kg shopping cart at a constant velocity for a distance of 18.0 m. She pushes in a direction 23.0° below the horizontal. evaluate the work done by the pushing force
Two 10 cm-diameter charged thin rings face each other, 20 cm apart. The left ring is charged to 20 nC and the right ring is charged to +20 nC. What is the electric field.
At its highest temperature, a space heater has a resistance of 15.5 ?, What is the average power output of the space heater
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