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A block of mass 2.0kg starts to slide from rest down a frictionless quarter circle track of radius 5.00m. At the base of the track there is a 10.0- meter rough patch with coefficient of kinetic friction of 0.24 and length of 7.50 meters. Following the rough patch, the block slides on a frictionless surface until it compresses a spring coming to rest as the spring is fully compressed a distance of 0.2m.
a. Find the speed of the block at the base of the circular ramp.
b. Find the work done by friction.
c. Find the spring constant k for the spring.
Xu is a new material discovered by a TA. The specific heat C and latent heat L of Xu are measured by heating up a piece of Xu sample. The temperature T (in K) of Xu sample varying as a function of heat Q (in 103 J) transferred to it.
A beam contains 3.6 x 105 doubly charged positive ions per cubic centimeter, all of which are moving north with a speed of 5.3 x 105 m/s. Find what is the magnitude of the current density
A sound source radiates sounds uniformly in all directions. the intensity of the sound at a distance of 100 m is 1.00 x 10^-4 W/m^2. What is the power of the sound source
A resistor (R = 900 ?), a capacitor (C = 0.25 µF), and an inductor (L = 2.0 H) are connected in series across a 240 Hz AC source for which ?Vmax = 125 V. compute the phase angle between the current and voltage
Find an expression for the change in the system's potential energy in terms of the parameters shown in the figure. (Use any variable or symbol stated above along with the following as necessary: g. Do not substitute numerical values; use variables..
The launching speed of a certain projectile is five times the speed it has at its maximum height. Calculate the elevation angle at lauching
A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. How many revolutions per minute is the sample making
A 73.6 kg weight-watcher wishes to climb a mountain to work off the equivalent of a large piece of chocolate cake rated at 514 (food) Calories. How high must the person climb
Multiple-Concept Example 9 reviews the concepts that are important in this problem. An electron, traveling at a speed of 5.39 x 107 m/s, What is the wavelength of the X-ray photon
a double inclined plane supports two blocks a and b. a and b both weigh 10lb. if block a is on an incline of 60 degrees
A pitcher claims he can throw a 0.145-kg baseball with as muchmomentum as a 3.00-g bullet moving with a speed of 1.50 x 103m/s. What must the baseball's speed be if the pitcher's claim is valid
A thin uniform rod has a length of 0.550 meter and is rotating in a circle on a frictionless table. The axis of rotation is perpendicular to the length of the rod at one end and is stationary. Estimate what is the mass of the bug
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