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Q. If 20 grams of hot water at 80 C is poured into a cavity in a very large block of ice at 0 C, what will be the final temperature of the water in the cavity? How much ice must melt in order to cool the hot water down to this temperature?
Q. A planet's moon travels in an approximately circular orbit of radius 9.0 107 m with a period of 6 h 44 min. Calculate the mass of the planet from this information.
The concepts for finding the change in length of a rod.
A chair of weight 130 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 43.00 N directed at the angle of 35.0 degrees below the horizontal and the chair slides along the floor. Using Newton's law..
An m=8.25 Kg mass is suspended on a string that is pulled upward by the force of F=83.3 N. If the upward velocity of the mass is 3.25 m/s right now, what is the velocity 5.50 s later.
A 0.410kg block is attached to a horizontal spring that is at its equilibrium length, and whose force constant is 22.0N/m . The block rests on a frictionless surface. A 6.00×10^2kg wad of putty is thrown horizontally at block, hitting it with a s..
According to the Guinness Book of World Records (1990 edition, p. 169), the highest rotary speed ever attained was 2010 m/s (4500 mph). The rotating rod was 15 cm (5.9 in) long. Imagine the speed quoted is that of the end of the rod.
Boxes are transported from one location to another in the ware-house by means of a conveyor belt that moves with a constant speed of 0.50m/s. At a certain location the conveyor belt moves for 2.00 m up an incline that makes an angle of 10° with the h..
But rather caused by a star collapsing upon itself causing not a huge bang as once thought, other than rather a wimper, later emitting Hawking Radiation.
A uniform solid flywheel of radius 1.4m and mass 15kg rotates at 2.4 rad/s. What is the magnitude of flywheel's angular momentum in kg.m^2/s.
A sound source emits sounds of frequency 210Hz that travel by still air at 340m/s. The listener moves at 75 m/s relative to still air toward the stationary source. What is wavelength of the sound between the source and the listener.
An empty sled of mass 25kg slides down a muddy hill with the constant of 2.40m/s. The slope of the hill is inclined at the angle of 15 degrees with the horizontal.
illustrate a diagram to show the forces acting on the aircraft while it is flying in a horizontal circle with its wing banked at an angle to horizontal.
A wooden raft has a mass of 67 kg. When empty it floats in water (density 1000 kg/m3) with 51 percent of its volume submerged. What mass of sand can be put on the raft without it sinking.
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