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A student drops two metallic objects into a 120 g steel container holding 150 g of water at 25°C. One object is a 230 g cube of copper that is initially at 85°C, and the other is a chunk of aluminium that is initially at 5.0°C. To the surprise of the student, the water reaches a final temperature of 25°C, precisely where it started. What is the mass of the aluminium chunk?
a solenoid is designed to produce a magnetic field of 2.50times10?2 at its center. it has a radius of 1.70 and a length
Indicate the negative x direction by including a negative sign in the answer, but omit a sign for the positive x direction.
A tennis ball on Mars, where the acceleration due to gravity is 0.379 of a g and air resistance is negligible, How high above its original point did the ball go
What differences exist between Bohr model and the modern theory of an atom and what major flaw is built-in to the Bohr model of the atom
A 106 watt motor is used to lift a 114 kg container to a height of 6 m. How much time does it take to lift the container with the motor
A slinky has a mass of 0.28kg and negligible length. When it is stretched 1.6m, it is found that transverse waves travel the length of the slinky in 0.80s. (The slinky stretches like an ideal spring, and propagates transverse waves similar to a rope ..
A golf ball is shot from a tee, elevated 20.0 m above the green, what will be the speed of the golf ball just before it hits the green, 20.0 m below where it started
suppose the gas in a hot air balloon has density 0.800 kgm3. what volume must the balloon exceed in order to lift a
Two dams form artificial lakes of equal depth. But, one lake backs up 15 km behind the dam, and the other backs up 30 km behind. What effect does the dissimilarity in length have on the pressures on the dams?
An elastic conducting material is stretched into a circularloop of 11.0 cm radius. It is placedwith its plane perpendicular to a uniform 0.600 T magnetic field. What emf is induced in theloop at that instant
A projectile is launched from ground level with an initial speed of 52.2 m/s. Find the launch angle (the angle the initial velocity vector is above the horizontal) such that the maximum height of the projectile is equal to its horizontal range. (I..
A pulley, with a rotational inertia of 1.1 x 10-3 kg·m2 about its axle and a radius of 5.8 cm, is acted on by a force applied tangentially at its rim. The force magnitude varies in time as F = 0.16t + 0.43t2, with F in newtons and t in seconds.
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