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A 500-g aluminum container holds 300 g of water. The water and aluminum are initially at 40°C. A 200-g iron block at 0°C is added to the water. Assume the specific heat of iron is 450 J/kg⋅°C, the specific heat of water 4180 J/kg⋅°C and the specific heat of aluminum is 900 J/kg⋅°C.
Determine the change in thermal energy of the water.
Express your answer to two significant figures and include the appropriate units.
An airplane is flying with a velocity of 90 at an angle of 22 above the horizontal. When the plane is a distance 122 directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
At the right you see that a string (mass negligible) passes over a pulley. calculate the normal force of the floor on the bottom of the 5 kg mass
A 71kg pole-vaulter falls from rest from a height of 4.6m onto a foam-rubber pad. The pole-vaulter comes to rest 0.4s after landing on the pad.
A potato gun is capable of launching a spud farther than a TigerWood's drive. If the muzzle speed is 53 m/s, and it is launched atan angle θ = 46°, what is its speed at the time it hits the ground (in m/s)?
You have an inertia of 52 kg and are standing at rest on an iced-over pond in your skates. Suddenly, your 60-kg brother skates in from the right with x component of velocity -4.8 m/s and collides elastically with you. What is the siblings' relative ..
A diving bell in the shape of a cylinder with a height of2.80 m is closed at the upper end andopen at the lower end. How high does sea water rise in the bell
two charges -17 c and 5.5 c are fixed in place and separated by 2.3 m. a at what spot along a line through the charges
A rectangular loop of wire lies in the plane formed by the line y=x and the z-axis. The square has area of 280cm^2 so that A= (39.6i - 39.6j) x 10^-3. A magnetic field B= 0.32T points in the negative x direction.
A bead with a mass of 0.083 g and a charge of 15 nC is free to slide on a vertical rod. At the base of the rod is a fixed 10nC charge. In stability, at what height above the fixed charge does the bead rest.
A person wants to push an 80-kg box across the floor. The coefficient of friction between the box and the floor is 0.5. What is the normal force experienced by the box as it sits on the floor
The shells fired from an artillery piece have a muzzle speed of 180 m/s, and the target is at a horizontal distance of 1.60 km. Find the smallest angle relative to the horizontal at which the gun should be aimed
What is the magnitude of the contact force on the student by the backpack.
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