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32 violins playing simultaneously with the same intensity combine to give an intensity level of 82 dB. a) What is the intensity level of each violin? (b) If the number of violins is increased to 64, will the combined intensity level be more than, less than, or equal to 164 dB?
A 1200kg car (A) traveling due north at 25m/s collides with a 2000kg truck traveling due west at 18m/s. What is the velocity of the wreckage just after the collison
A 3.5 m string is stretched between a pulley and a wave generator consisting of a plate oscillating up and down with small amplitude and frequency 150 Hz. What is the linear mass density of the string
A softball having a mass of 0.255 kg is pitched at 92.3 km/hr. By the time it reaches the plate, estimate the average force of air resistance during a pitch
Two firecrackers explode at the same place in a laboratory and are separated by a time of 3 years as measured on the laboratory clock. What is the spatial distance between these two events in a rocket frame in which the events are separated in time..
A battery has an emf of 15.0 V. The terminal voltage of the battery is 10.2 V when it is delivering 24.0 W of power to an external load resistor R. What is the internal resistance of the battery
The wire is cut at point P. Will the potential difference between points A and B increase, decrease, or remain the same? Give reason for.
How far above the base of the cliff does this happen. What is an acceleration at the point where the block begins to slip.
A solenoid with 375 turns per meter and a diameter of 13.7 cm has a magnetic flux through its core of magnitude 1.5 10-4 T · m2. Find the current in this solenoid
A 20 g bullet inelastically collides with a 3 kg wooden block at rest. find How much energy is lost in the collision
A heating element in a stove is designed to dissipate 3200 W of heat when it is connected to 245 V. Assuming that the resistance is constant, calculate the current in this element if it is connected to 115 V.
An aluminum rod is 23.0 cm long at 20°C and has a mass of 350 g. If 15000 J of energy is added to the rod by heat, what is the change in length of the rod
A boat crosses a 500 m river. The water run at 5.9527 m/s due east. The boat is able to travel at 5 m/s relative to the water. what is the net displacement along the river bank
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