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To move a large crate across a rough floor, you push on it with a force F at an angle of 21°, below the horizontal. Find the acceleration of the crate, given that the mass of the crate is m = 31
Water flows through a horizontal pipe of cross-sectional area 10 sq. cm. At one section the cross-sectional area is reduced to 5 sq. cm. The pressure difference between the two sections is 300 Pa. H
Push a heavy piece of furniture. Experiment to find the most efficient method. a. At what part of the object did you apply the force? Explain the underlying principles.
How many hydrogen bonds can each water molecule participate in?Illustrate your answer by drawing as many water molecules as isnescessary to support your answer and use dashed lines (----) toindicat
a) A 2kg block rests on a 30 degree incline; determine the coefficient of static friction required to keep the block still.
A gas at 350K and 12 atm has a molar volume 12% larger than that calculated from the perfect gas law. Calculate (a) the compression factor under these conditions and (b) the molar volume of the gas.
A pilot wants to fly due north a distance of 125km. the wind is blowing out of the west as a constant 35km/h. If the plane can travel at 175km/h, how long will the trip take?
Neglecting air resistance, use Newton's second law to find the rock's position as a function of time in the horizontal and vertical Cartesian coordinates.
How do you use formula 4-2 d=C/n(L)M where C is a constant that experimentally has a value of 1.5, M is the correction for magnification, and n(L) is the number of grain boundaries crossed to estim
The initial acceleration of the first particle is observed to be 5.7 m/s2 and that of the second to be 12 m/s2. If the mass of the first particle is 8.5 x 10-7 kg, what are (a) the mass of the second
In the laboratory a student named Georgia weighed 4.75 g ofan unknown solid mixture containing benzoic acid, copper (II)sulfate, and sand. She added 15 mL of acetone to her sample and dissolved one
Hexane has a normal boiling point of 68.7 C. What is the mole fraction of a nonvolatile solute in a hexane solution which has avapor pressure of 600 torr at 68.7C?
In the rocket frame in which the meter stick is at rest, the meter stick is not contracted, while in this frame the hole in the plate IS contracted. Therefore, there must be a collision between the
The initial temperature of the water and calorimeter is 16°C, and the final temperature after equilibrium is established is 38° C.
When thermal equilibrium is attained, the temperature of the water is 54°C. Determine the specific heat of the block.
A fixed amount of gas at 20 degrees Celsius occupies a volume of12.0L under pressure of 650 torr. Calculate its volume at the same pressure when the temperature is increased to 280 degrees Celsius.
When the ball hits the wall, the horizontal component of its velocity is reversed; the vertical component remains unchanged. (Ignore any effects due to air resistance.)
A rescue boat with speed 21.0 km/hr (with respect to the water) sets off from the dock at the optimum angle to reach the child as fast as possible. How far from the dock does the boat reach the chil
An unseeded BOD test is conducted on a polluted surface water sample by adding 100 mL of the sample to a 300-mL BOD bottle and filling with dilution water.
100 g of ice at 0 degrees C and 100 g of steam at 100 degrees C interact thermally in a well-insulated container. What is the final state of the system?
The momentum of a particle is given by m*v where m is the mass ofthe particle and v its velocity. The kinetic energy is givenby 1/2 m*v^2. Two particles have the same de-Broglie wave length, however
27 g of copper pellets are removed from a 300 degrees C oven and immediately dropped into 90 mL of water at 22 degrees C in an insulated cup. What will the new water temperature be?
An element crystalizes in a body centered cubic lattice. theedge of the unit cell is 3.36 angstroms, and the density of thecrystal is 7.97g/ cm3. what is the atomic weight of the element in grams pe
a) If a mass of 2kg is attached to a string of length 1m and pulled back to the angle shown (30 degrees from straight down), what velocity will the mass have at the "bottom" of its swing?
Demonstrate proper notation and use of units by converting the pressure rating written on a tire of 35 lb/in^2 to kilopascalas. Use the following 1N=.2248 lb; in=2.54cm.