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A solid block is suspended from a spring scale. The reading on the scale when the block is completely immersed in water is 25.8 N, and the reading when it is completely immersed in a liquid of density 869 kg/m3 is 26.7 N.
(a) What is the block's volume?(b) What is the block's density?
A small airplane has a mass of 2500 kg and is flying at a speed of 100. m/s at a height of 340 m above the ground. Determine the kinematic energy of the airplane while it is flying
If the microphone in problem 3 has an area of 0.750 cm2. What is the power intercepted by the microphone
question1a piece of wire with mass per unit length 78 runs horizontally at right angles to a horizontal magnetic field.
A 7.05-kg ball of clay is thrown downward from a height of 4.08m/s onto a spring with k=1600 N/m. Find the total work done on the clay during the spring's compression
A spring with constant k=30N/m is used to shoot a block (mass 1kg) across a frictional horizontal surface. what is the force of friction acting on the block
A pendulum clock keeps time by the swinging of an attached mass at the end of a massless string of length L, What is the angular position of the mass at t = 0.246s
Time standards are now based on atomic clocks. A promising second standard is based on pulsars, which are rotating neutron stars (highly compact stars consisting only of neutrons). what is the associated uncertainty
A circuit has a resistance of 1 ?; a reactance, due to the capacitance, of 27 ?; Find the impedance of the circuit
A 2.00 g plastic bead charged to -4.00 nC and a 4.00 g glass bead charged to +8.00 nC are 2.00 cm apart, find the initial accelerations of the plastic bead
A 10cm x 10cm x 10cm box contains 0.010 mol of nitrogen at 20 degrees Celsius. What is the rate of collisions (collisions/s) on one wall of the box
You must determine the acceleration of a rocket so that its equipment can be deisgned to survive. The rocket will have a burn time of t = 30secs, What is the maximum altitude of the rocket
An 8m, 290 N uniform ladders rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.75, and the ladder makes a 50° angle with the ground. How far up the ladder can a 720 N person climb before the lad..
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