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The fundamental frequencies from a guitar string and a 440-Hz tuning forkinitially give 3 beats per second. However, when the string isloosened slightly, both its fundamental frequency and the beatfrequency decrease. Find the initial fundamental frequency of the guitar string.
An automobile has a mass of 1710 kg and a velocity of 17.2 m/s. It makes a rear-end collision with a stationary car whose mass is 2220 kg. What is the velocity of the two cars just after the collision
assume a block of mass 25.0 kg rests on a horizontal plane, and the coefficient of static friction between the surfaces is 0.220. what is the actual static frictional force that acts on the block if an external force of 25.0 N acts horizontally on..
Suppose you take a 2.0×102? resistor and a 0.40H inductor and make a series circuit with a voltage source that has voltage amplitude 30V, What is the current amplitude
A person of mass 75 kg stands at the center of a rotatingmerry-go-round platform of radius 2.6 m and moment of inertia 1500 kg·m2. The platformrotates without friction with angular velocity 2.0 rad/s. The person walks radially to the edge of the p..
A radio antenna broadcasts a 1.0 MHz radio wave with 29 kWof power. Assume that the radiation is emitted uniformly in all directions. (a) What is the wave's intensity 35 km from the antenna? I=___?___W/m^2 (b) What is the electric field amplitude at ..
A crate of mass 9.0 kg is pulled up a rough incline with an initial speed of 1.42 m/s. What is the change in kinetic energy of the crate
A telescope was used as a testbed for evaluating adaptive optics systems. This telescope has a 3.58 meter primary mirror with a focal ration of f/2.2. What is the plate scale of this telescope
Oxygen gas having a volume of 1.00 liter at 40.0 celsius and a pressure of 1.00 atmosphere expands until its volume its 1.50 liters, FInd the number of moles of oxygen
A projectile is fired in such a way that its horizontal range is equal to12.5times its maximum height. What is the angle of projection
an experiment that can be used to measure velocity of a bullet is to have two cardboard disks attached to a rotating
find the magnitude and direction of the impulse delivered to the ball by the floor.
You discover a new extra-solar planet orbiting a 1 solar mass star using high spatial resolution imaging and adaptive optics in the infrared part of the spectrum. What is the planet-star separation if you measure an angular separation of 0.6"
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