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Q1. What is the frequency of ultrasound in a medium if he wave length is 3.0 x 10^-3 m and velocity is 1300 mm/ms?
Q2. An object of mass m is sliding with speed v0 at some instant across a level tabletop, with which its coefficient of kinetic friction is. It afterwards moves through a distance d and comes to rest. Which equations for the speed v0 is reasonable (choose one)? And Why?
Establish the temperature at the interface
A 56.0 resistor is connected in parallel with a 117.0 resistor. This parallel group is connected in series with the 27.0 resistor. The total combination is connected across a 15.0 V battery. What is the current of the 117 resistor? What is the power ..
A 9.05 kg projectile is fired vertically upward. Air drag decreases the mechanical energy of the projectile-Earth system by 77.5 kJ throughout the projectile's ascent. How much higher would the projectile have gone were air drag negligible.
What is torque exerted by the fish about an axis
Find the lowest energy of the system (in electron volts) and list the quantum numbers of all occupied states. Find when the current in the solenoid increases to 5.0 A in a period of 0.90 s.
The lens has a refractive index of 1.30. Find out the difference Δx in the positions where each crosses the principal axis.
A 100 arrow is shot perpendicularly from a bow whose effective spring constant is 500. If the bow is drawn 75 before shooting the arrow, to what height does arrow rise.
What is final total energy of the system
A 12 kg mass starts from rest and slides down an inclined plane 8.0 10-1 m long in 0.9 s. What net force is acting on the mass along the incline?
Illustrates the difference between acceleration and velocity
A uniform density cube of mass m, side 2b, and center at C is placed on a fixed horizontal cylinder of radius r and center O in Earth's gravitational field.
What is the magnitude of the runner's total displacement . What is the phase difference between the two waves next they reach the observer.
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