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Two identical waves each having an amplitude 0.02 m has a phase difference of ?/8 when they meet at a point. What is the amplitude of the resultant wave at this point? A string whose length is 1.0 m is fixed at both ends and vibrates according to the equation: y(x,t)=0.04sin(?x)cos(2?t) What is the speed of this wave?
A 226.0 kg block of ice at 0o C is placed in a large lake. The temperature of the lake is just slightly higher than 0o C, What is the entropy change of the ice
A solar cell generates a potential difference of 0.0866 V when a 500 ? resistor is connected across it, and a potential difference of 0.1333 V when a 1000 ? resistor is substituted. What is the internal resistance of the solar cell? What is the emf o..
A 80 kg football player stand at the end of a uniform 8m, 50kg diving board supported as shown. Determine the forces exerted by the two supports.
A charge of 3.0 x 10^8 C exerts a force of 0.045 N on a charge of 5.0 x 10^-7 C. How far apart are the charges
Gold, which has a mass of 19.32 g for each cubic centimeter of volume, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. what is the area of the leaf in square meters
A mass-spring system oscillates with an amplitude of 5.00 cm. If the spring constant is 266 N/m and the mass is 457 g, determine the mechanical energy of the system
A 2 kg gun imparts a speed of 500 m/s to a 25 g bullet. what average force is exerted on the shooter's shoulder
When light of wavelength 350 nm falls on a potassium surface, electrons having a maximum kinetic energy of 1.31 eV are emitted. Find values for the following. the work function of potassium
The highest recorded waterfall in the world is found at Angel Falls in Venezuela. Its longest single waterfall has a height of 807 m. what is the maximum temperature of the water at the bottom of the falls
A uniformly accelerated car passes three equally spaced traffic signs. The signs are separated by a distance d = 20 m. What is the magnitude of the acceleration of the car
Find the magnetic field at P and P' on the axis of a circular coil of radius a = 20.7 cm (see figure below). The coil consists of 10 turns of wire carrying a current of 4.07 A in the direction indicated. (Hint: the magnetic field on the axis of a ..
A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. What is the moment of inertia of the wheel
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