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As an eager scientist on a hot summer day you wish to determine how much ice to buy to add to your cooler which is filled with 36 cans of soda which are warm at 81.7°F. Each can has a mass of 396 g and ideally you want the temperature of the drinks to be 38.7°F. If there is no heat lost by the cooler and ignoring any heat lost to the soda containers, how much ice needs to be added to your cooler? (Assume the temperature of the ice is 32.0°F.)
An ice cube of volume 10.6 cm3 is at first at a temperature of -9.3°C. How much heat is necessary to convert this ice cube into steam.
A 3.57 kg block is drawn at constant speed 4.06 m along a horizontal floor by a rope exerting a 7.68 N force at angle of 15 degree above the horizontal. Work out the coefficient of kinetic friction between block and floor.
A 1700kg car travelling at a speed of 40m/s skids to the halt on wet concrete where f_k = 0.3. How long are the skid marks.
Describe what are the (a) magnitude and (b) direction of the boat's velocity relative to the ground? (c) How long does the boat take to cross the river?
Your roommate is working on his bicycle and has the bike upside down. He spins the 66.0cm -diameter wheel, Find the pebbles speed and acceleration
An electron with an initial speed of 4.00×105m/sis brought to rest by an electric field, What was the initial kinetic energy of the electron, in electron volts
An electron in an oscilloscope is accelerated as a result of the potential difference between the cathode and anode. The electron has negligible initial speed and a final speed of 2.40 107 m/s. Find the voltage drop from cathode to anode.
On an airplane's takeoff, the combined action of the air around the engines and wings of an airplane exerts an 8020-N force on the plane, focussed upward at the angle of 55.0° above the horizontal. The plane rises with constant velocity in the vertic..
The wind blows with a force of 425N north on a sail boat, while the water exerts a force of 325N west on the sailboat. Find out the magnitude and direction of the net external force on the sailboat.
Include in your answer why notification is required and identify the relevant legislation and documentation governing the requirement. who should the notification be reported to and explain the consiquences of not reporting in each circumstances.
Find out the friction force on the box
A golf ball of mass 0.045 kg is hit off the tee at a speed of 35m/s . The golf club was in contact with the ball for 3.90×10?3s. Find the impulse imparted to the golf ball
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