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121.7 J of heat energy are transferred to 38.53 g of mercury. By how much does the temperature increase? (in K) How much heat is needed to raise the temperature of 38.53 g of water with the same amount?
In a classical model of the hydrogen atom, the electron orbits a stationary proton in a circular orbit
A projectile is fired with an initial speed of 1000 m/s at anangle of 37o above the horizontal. If air resistance is neglected, the horizontalcomponent of the projectile’s velocity after 20 s is approximately ...?
the froghopper philaenus spumarius is supposedly the best jumper in the animal kingdom. to start a jump this insect can
A railroad car of mass 2.1 104 kg moving at 2.50 m/s collides and couples with two coupled railroad cars, What is the speed of the three coupled cars after the collision
A series LRC circuit consists of a 12.0-mH inductor, a 15.0-µF capacitor, a resistor, and a 110-V (rms) ac voltage source. what is its impedance at a frequency twice the resonance frequency
A 12 g bullet is fired horizontally into a 96 g wooden block initially at rest on a horizontal surface. estimate the speed of the bullet
A worker pushed a 27 kg block9.2m along a level floor at constant speed with a force directed27°below the horizontal. If the coefficient of kinetic friction is 0.20, how much work was done by the worker's force?
Two blocks on a frictionless table, A and B, are connected by a massless string. What is the ratio (ma/mb) of the blocks masses
An object is attached to the lower end of a 100-coil spring that is hanging from the ceiling. The spring stretches by 0.160 m. The spring is then cut into two identical springs of 50 coils each. Each spring is attached between the ceiling and the obj..
If a simple pendulum of mass 1.059kg and length 9.99cm is moving at 101 cm/s as it passes through the low point of its arc, What is the tension in the string of the pendulum
A soccer ball lying on the ground is kicked with an initial velocity of 10.0 m/s at an angle of 37 degrees above the horizontal. How far over does it land on the ground?
A solid block is attached to a spring scale. When the block is suspended in air, the scale reads 21.1 N; when it is completely immersed in water, What is the volume of the block
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