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Q. A toy train with 1.2kg mass is moving at a stright line platform with a velocity 12m/s. It collides another toy train of 0.9kg mass with velocity of 7m/s. If e = 0.8, what is the velocity of each train after the collision.
Q. You want to take a bath with the water temperature at 35.0°C. The water temperature is 38.0°C from the hot water tap and 11.0°C from the cold water tap. You fill the tub with a total of 185 kg of water. How many kilograms of water from the hot water tap do you use?
Two ocean liners, each with a mass of 40,000 metric tons, are moving on parallel courses, 92 m apart. What is the magnitude of the acceleration of one of the liners toward the other due to their mutual gravitational attraction? Care for the ships as ..
A Toyota Prius driving north at 61.0 {rm mph} and VW Passat driving south at 41.0 {rm mph} are on the same road heading along each other (but in different lanes). (We take the positive direction to be north.)
An insulated Thermos contains 210 cm3 of hot coffee at 88 °C. You put a 19.00 g ice cube at its melting point to cool the coffee. By how many degrees has the coffee cooled once the ice has melted and equilibrium is reached? Treat the coffee as though..
If the spring is stretched by 1.4 times the value in part A, and then released from rest, and the coefficient of kinetic friction between the box and the plank is 0.34, what is the magnitude of the initial acceleration of block as it starts moving..
A tube is open only at one end. A certain harmonic generted by the tube has a frequency of 470Hz. The next higher harmonic has a frequency of 555Hz. The speed of sound in air is 343m/s.
The distance to the Andromeda Galaxy is estimated at about 2 ´ 106 light years. A light year is distance travelled by light in one year; if the speed of light is 3 ´ 108 m/s, about how far is it from our galaxy to Andromeda? (1 year = 3.15 ´ 107 s..
The inside of the cylindrical can shown above has cross-sectional area 0.005 m^2 and length 0.15 m. The can is filled with an ideal gas and covered with the loose cap. The gas is heated to 363K and some is allowed to escape from the can so that re..
In the lungs there are tiny sacs of air that are called alveoli. An oxygen molecule (mass = 5.30 x 10-26 kg) is trapped within a sac, and the uncertainty in its position is 0.140mm. What is the minimum improbability in the velocity of this oxygen ..
Light is emitted by a sodium sample that is moving toward Earth with speed v. The wavelength of the light is 589 nm in the rest frame of sample. The wavelength measured in the frame of Earth is 537 nm. Find v.
Light of wavelength 540 nm is diffracted by a grating ruled with 1000 lines/cm. There are a total of 2000 lines in the grating. Find the angular deviation of the third order image.
The acceleration of gravity is 10 m/s2. What is the acceleration of a 39 kg pail of cement that is pulled upward (not sideways) with a force of 421 N? Answer in units of m/s2.
What magnitude of charge must be given to the drop
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