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A wooden block floating in seawater has half of its volume submerged. When the block is placed in mineral oil, 93% of its volume is submerged.
a) Find the density of the wooden block. (The density of seawater is 1.024 g/cm3.)b) Find the density of the mineral oil.
A helium-neon laser (? = 632.8 nm) is used to calibrate a diffraction grating. what is the spacing between adjacent grooves in the grating
A screen is placed 50cm from a single slit. A laser of wavelength 635nm is shown on the slit resulting in a single slit diffraction pattern, What is the width of the central maximum
A football is kicked from the ground towards the end zone, which is 60.0 m away. If the football's initial velocity is 25m/s, directed 41 degrees of the horizontal, will it land in the end zone or fall short? Assume air resistance is negligible. Show..
Astronomers discover an exoplanet (a planet of a star other than the Sun) that has an orbital period of 3.35 Earth years in its circular orbit around its sun, Find the radius of the exoplanet\'s orbit
A 53.0-kg person jumps from rest from the top of a 10.0-m-high tower straight down into the water. Determine the magnitude of the average force that the water exerts on the diver
Illustrate what is the maximum load that can be hung from a copper wire of diameter of 0.47 mm before it breaks?
A 245 ball is tied to a string. It is pulled to an angle of 5.20 and released to swing as a pendulum. A student with a stopwatch finds that 10 oscillations take 10.5.
how does the count rate vary with distance from a point source? if the counter is moved twice the distance from the source, how is the count rate affected
A heat engine operates in a Carnot cycle between 76.0°C and 355°C. It absorbs 21000 J of heat per cycle from the hot reservoir. The duration of each cycle is 3.00 s
A magnetic field points perpendicular into a 5x12 cm rectangular coil of 44 turns and resistance .25 omega. wa a certain instant, at what rate is the magnetic field changing in telsa per second
A dipole is centered at the origin and has charges q and -q located at z=l/2 and z=-l/2, respectively. Find the electric field at position r along the z axis and also at position r along the x-axis
In recent years, a number of nearby stars have been found to possess planets. Suppose, the orbital radius of such a planet is found to be 3.1 1011 m, with a period of 1140 days
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