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In the figure, a slab of mass m1 = 19kg rests on a frictionless floor, and a block of massm2 = 12 kg rests on top of theslab. Between block and slab, the coefficient of static friction is 0.30, and the coefficient of kinetic friction is 0.20. The block is pulled by a horizontal force of magnitude 62 N. What is the acceleration of theslab?
An insulated Thermos contains 152 cm3 of hot coffee at 90 °C. You put a 12.0 g ice cube at its melting point to cool the coffee. By how many degrees has your coffee cooled once the ice has melted and equilibrium is reached?
A fisherman is fishing from a bridge and is using a "33N testline." In other words, the line will sustain a maximum force of33.0 N without breaking.
Household wiring made of aluminum wire with cross section area 3.1 x10^-6 m2 carries a current of 4.5 A. The bulk resistivity of aluminum is 2.82 x10^-8. What is the power loss over 5.2 m of wire?
a tungsten target is struck by electrons that have been accelerated from rest through a 29.9-kv potential difference.
A resistor and an inductor are connected in series across an AC voltage source oscillating at 60 Hz. What is the rms voltage of the source
A rocket is launched at an angle of 52° above the horizontal with an initial speed of 103 m/s. The rocket moves for 3s along its initial line of motion with an acceleration of 32 m/s2. At this time, its engines fail and the rocket proceeds to move..
Compare teh parameters for H (for magnetostatics) and D (for electrostatics). In your discussion include comments on their origin, physical interpretation, connection to "free" quantities, and their usefulness in real world applications. There should..
assume the earth to be sphere of a uniform densitya what is its rotational energy? take the radius of the earth to be
A lifeguard on a beach observes that waveshave a speed of 2.60 m/s and a distance of 2.50 m between wavecrests. What is the period of the wave motion
The drawing shows Robin Hood (mass = 76.9 kg) about to escape froma dangerous situation. With one hand, he is gripping the rope thatholds up a chandelier (mass = 224 kg). When he cuts the rope whereit is tied to the floor, the chandelier will fall..
A tennis ball of mass 57 g travels with velocity m/s toward a wall. After bouncing off the wall, What is the change in the momentum of the tennis ball
The mean free path of a molecule in a gas is 280 nm. What is the mean free path if the gas temperature is tripled at constant volume?What is the mean free path if the gas temperature is tripled at constant pressure?
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