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A solid block of wood is a cube whose volume is 1x10^-3m^3. When dropped into a swimming pool, it floats such that 20% of it is above water. How much does the block of wood weigh? (Use 10^3 kg/m^3 for the density of water.) PLEASE EXPLAIN. The answer is 7.8 im just trying to understand the problem so if u could show the steps with numbers i'd appreicate it.
Two boats start together and race across a 62-km-wide lake and back. Boat A goes across at 62 km/h and returns at 62 km/h. Boat B goes across at 31 km/h, and its crew, realizing how far behind it is getting, returns at 93 km/h.
What is the weight of the staging. A highway curve with radius 800 is to be banked so that a car traveling 56.0 will not skid sideways even in the absence of friction. At what angle must the curve be banked.
A Simple Harmonic Oscillator consisting of a 305 g mass and a spring is set oscillating on a smooth flat surface. If the greatest speed of the mass is 1.50 m/s and the spring constant of the spring is 2.00 N/m.
A toy car runs off the edge of the table that is 1.6405 m high. The car lands 0.3311 m from the base of the table how long does it take for the car to fall? The acceleration by reason of gravity is 9.80 m/s2.
A circular saw blade completes 1200 revolutions in 40 rm s while coasting to a stop after being turned off. Assuming steady deceleration, what are (a) angular deceleration and (b) initial angular speed.
What is its angular displacement in this time.
A speedboat starts from rest and accelerates at +2.01 m/s2 for 6.95 s. At the end of this time, the boat continues for the additional 5.70 s with an acceleration of +0.518 m/s2. Following this, the boat accelerates at -1.49 m/s2 for 8.20 s.
A railroad car of mass 3.3 104 kg moving at 3.50 m/s collides and couples with two coupled railroad cars, How much kinetic energy is lost in the collision
A hotel elevator ascends 160m with a maximum speed of 4.20 m/s. Its acceleration and deceleration both have a magnitude of 1.0 m/s2. How long does it take to make the complete trip from bottom to top.
A 40-g bullet leaves the muzzle of a gun at a speed of 300 m/s. If the barrel of the gun is 12 cm long, what is the force acting on the bullet while it is in the barrel.
A beam of neutrons with a de Broglie wavelength of 0.260nm diffracts from a crystal of table salt, which has an interionic spacing of 0.280nm, What is the speed of the neutrons
In an interstellar gas cloud at 48.2 K, the pressure is 1.16 x 10-8 Pa. what is their mean free path
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