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Two horizontal forces are acting on a box with mass of 3.0 kg, Only force 1 is drawn on the diagram and the is equal to +9.0 N. Find magnitude and direction when acceleration is +5m/s^2, -5m/s^2, and 0m/s^2.
A tradesman sharpens a knife by pushing it against the rim of a grindstone. The 35 cm diameter stone is spinning at 200 rpm and has a mass of 18 kg. The coefficient of kinetic friction between the knife and the stone is 0.20. If the stone loses 10% o..
A Young's double-slit experiment is performed using light that has a wavelength of 623 nm. Calculate the angle that locates the first-order bright fringes
The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm(red) and 486 nm (blue). What is the distance between the first-order red and blue fringes? (d=)
A baton twirler is twirling her baton in a horizontal circle at a rate of 3.35 revolutions per second. Calculate the induced EMF between the center and one end of the baton
an astronomical unit au is the average distance of earth from the sun approximately 1.50 times 108 km. the speed of
A 80 pF capacitor is charged to a potential difference of 140 V, and the charging battery is disconnected. what is the capacitance of this second capacitor
a given star is a sphere with a radius of 5.81x108 m and an average surface temperature of 6970 k. determine the amount
An electrical heating coil is immersed in 4.0kg of water at 21 degrees C. What is the potential difference at which the coil operates
Three charges are in a line on the x-axis. +Q is at the origin. -4Q is at x=1. At what point on the x-axis could a charge be placed such that it feels no force at all
The right-side rearview mirror of Mike's car says that objects in the mirror are closer than they appear. Mike decides to do an experiment to determine the focal length of this mirror. He holds a plane mirror next to the rearview mirror and views ..
Here on Earth you hang a mass from a vertical spring and start it oscillating with amplitude 1.9 cm. How long does it take for the mass to make one round trip
The temperature of human is normally 37.0 degree Celsius. (a) at what wavelength will a human radiate the maximum radiation? (b) estimate the total power radiated by a person of medium build(assume a cylindrical human of height 1.80 meters and rad..
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