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A wooden raft has a mass of 69 kg. When empty it floats in water (density 1000 kg/m3) with 25% of its volume submerged. What mass of sand can be put on the raft without it sinking?
For a science fair competition, a group of high school students build a kicker-machine that can launch a golf ball from the origin with a velocity of 37.5 m/s and initial angle of 38.4° with respect to the horizontal.
A baseball is thrown horizontally at a speed of 43 m/s. When it reaches home plate, what is the horizontal component of its velocity
Three radio-equipped plumbing vans are broadcasting on the samefrequency f0. Van 1 is moving east of van 2 with thespeed v, What is the frequency of each van as received by theothers
5 moles of an ideal gas, initially at P=105 Pa and V=3m3, expand adiabatically until the volume is doubled, How much work was done in the adiabatic step
Find the gage pressure at the center of pipe A in pounds per square inch and in kilopascals.
A woman is riding a Jet Ski at a speed of 24 m/s and notices a seawall straight ahead. what is the minimum distance from the seawall that she can begin making her turn and still avoid a crash
In the figure particles with charges q1 = +5e and q2 = -13e are fixed in place with a separation of d = 21.3 cm, what are the finite positive and negative values of x
What is the difference in blood pressure ({rm mm-Hg}) between the top of the head and bottom of the feet of a 1.80-{rm m}-tall person standing vertically.
A bacterium (mass = 2 × 10-15 kg) in the blood is moving at 0.28 m/s. What is the de Broglie wavelegth of this bacterium
suppose that we could use the energy released when 5 g of antimatter annihilates 5g of matter to lift a mass 3 km from the Earth's surface. how much mass can we lift? answer in unites of kg.
An air parcel moves northwards and becomes entrained in a strong westerly flow, circling the entire globe in the space of a few weeks. State the name given to this high-level flow and define briefly how its structure is related to lateral and vert..
an insulated container is filled with a mix of 400 g of water at 20 C and 60 g of ice at 0 C. assuming negligible heat is exchanged with the container, what is the temperature of the mixture when it reaches thermal equilibrium.
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