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A 20.0-kg crate is moving to the right on the floor with a speed of 25.0m/s. The coefficient of kinetic friction between the crate and the floor is 0.5. What is the speed of the crate after 3.0 seconds? please be specific on each step, I have been stuck on it for a while.
When the wire is removed, the spheres repel each other with an electrostatic force of 0.0394 N. Of the initial charges on the spheres, with a positive net charge, what was (a) the negative charge in coulombs on one of them and (b) the positive cha..
Two automobiles are equipped with the same single-frequency horn. When one is at rest and the other is moving toward the first at 20 m/s, What does the frequency the horns emit
In a lab experiment that uses velcro equipped gliders, GliderA has a mass of 1kg and Glider B has a mass of 0.5kg. what is the final velocity of the joined glider sand
Determine the maximum possible kinetic energy in electron volts of a photoelectron ejected from the metal that absorbs a 190-nm photon
A coil has 2.72 ? resistance and 0.405 H inductance. If the current is 4.92 A and is increasing at a rate of 4.42 A/ s, what is the potential difference across the coil at this moment
(A) Calculate the current in the resistor 9.00µs after the resistor is connected across the terminals of the capacitor. (B) What charge remains across the capacitor after 8 µs (c) What is the maximum current across the resistor?
To fit a contact lens to a patient's eye, a keratometer can be used to measure the curvature of the cornea-the front surface of the eye. Determine the radius of curvature of the cornea
The froghopper, Philaenus spumarius, holds the world record for insect jumps. What horizontal distance did the froghopper cover for this world-record leap
A sample contains radioactive atoms of two types, A and B. Initially there are three times as many A atoms as there are B atoms. Two hours later, the numbers of the two atoms are equal. The half-life of A is 0.72 hours. What is the half-life of B?
A single-turn square loop of side Lis centered on the axis of a long solenoid. In addition, the planeof the square loop is perpendicular to the axis of the solenoid. The solenoid has 1460 turns per meterand a diameter of 4.00 cm, and carries a cur..
A 47.0-kg stunt pilot who has been diving her airplane vertically pulls out of the dive by changing her course to a circle in a vertical plane. what is the minimum radius of the circle for the acceleration at this point not to exceed 4.00g
A toaster rated at 1055 W operates on a120 V household circuit and a 4.00 m length of Nichrome wire as its heating element. The operating temperature of this element is304°C. What is the cross-sectional area of the wire?
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