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A force of 63.1 N is required to start a 7.0-kg box moving across a horizontal concrete floor. What is the coefficient of static friction between the box and the floor? If the 63.1N force continues, the box accelerates at 0.74m/s^2 . What is the coefficient of kinetic friction?
A car travels at a constant speed around a circular track whose radius is 3.1 km, What is the magnitude of the centripetal acceleration of the car
question 40 g of copper pellets are removed from a 460degc oven and immediately dropped into 100 ml of water at 18degc
A typical home may require a total of 2.00*10^3kWh of energy per month. Suppose you would like to obtain this energy from sunlight, which has an average daylight intensity of 1400 W/m^2.
At the instant the traffic light turns green, an automobile starts with a constant acceleration a of 2.2 m/s2, How fast will the automobile be traveling at that instant
The capacitor in an RC circuit(R = 100 Ω, C = 45 uF) is initially uncharged. Find the charge on the capacitor in the circuit one time constant (r = RC) after the circuit is connected to a9.0-V battery.
An electron orbiting a hydrogen atom has an initial energy of -0.544 eV. The atom emits a photon, then absorbs a photon, What was the wavelength of the emitted photon
Two electrons in the same atom have n=3 and l = 1, How many states wouldbe possible if the exclusion principle did notapply to the atom
The speed of light in a certain substance is 89% of its valuein water. What is the index of refraction of this substance
A beam of electrons is incident on two slits separated by a distance of 2.0×10-6 m. Calculate the kinetic energy of the electrons
A 18.2 omegacap.gif resistor, 8.7 omegacap.gif resistor, and a 4.3 omegacap.gif resistor are connected in parallel to a 12 V battery. Determine the current delivered by the battery
Starting from rest a wheel accelerates at a rate of 9.2 rad/s^2 for 5.61 s. Calculate the number of revolutions it makes in this time
A wheel has a radius of 0.5 m. If the wheel rotates on its axis through an angel of 46 degrees, what distance does a point on the rim of the wheel move
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