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A 10 cm x 10 cm x 10 cm block of steel (density of steel =7900 kg/m3) is suspended from a spring scale. The scaleis in newtons.
a. What is the scale reading if the block is in air?
b. What is the scale reading after theblock has been lowered into a beaker of oil and is completely submerged?
A diverging lens (f = -10.0 cm)is located 21.0 cm to the left of aconverging lens (f = 30.0 cm). What is the height of the final image
Two pendulums are allowed to rotate frictionlessly and without air resistance around the same point of rotation, Where do the masses collide
For the third circuit, consisting of a single battery and two light bulbs in parallel, how does the brightness of the bulbs compare to the first circuit, What is the current through each bulb
Two skaters are studying collisions on an ice-covered(friction-less) lake. Skater 1, (m1=85 kg) is initiallytraveling with a speed of 5.0 m/s, and skater 2 (m2=120kg) is intially at rest. Skater 1 then "collides" with skater 2 and they lock arms an..
A playground merry-go-round of radius R = 1.80 m has a moment of inertia I = 255 kg · m2 and is rotating at 9.0 rev/min about a frictionless vertical axle. What is the new angular speed of the merry-go-round
A rod is 2.40 m long and has a diameter of 2.50 mm. A force of 2000 N is applied to the end to stretch the rod by 1.40 mm. What is the Young's modulus for this rod
A plane flying horizontally at a speed of 50.0 m/s and at an elevation of 160 m drops a package. How far apart will the two packages land on the ground (ignore air resistance)
A nonconducting solid sphere of radius R has a volume charge density that is proportional to the distance from the center. That is, ? = Ar for r R, Find the expressions for the electric field inside the sphere
A car wheel with a moment of inertia of 7.85 kg.m^2 is accelerating from 2160 rpm to 5040 rpm in a time of 10.0s. calculate The work done in raising the rotation frequency
Four identical springs are used as part of a car's system, one on each wheel. what is the spring constant of each of these springs
an electric dipole consists of q330nc separated by a distance of 1200nm. the dipole is initially oriented in -i
A 0.55 kg projectile is launched from the edge of a cliff with an initial kinetic energy of 1550 J and at its highest point is135m above the launch point. What was the vertical component of its velocity just after launch
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