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A solution is made by dissolving 3.14 g of NaCl in 79.9mL of water. what is the concentration of sodium chloride in units of weight/volume percent?
A 7.0-kg rock is subject to a variable force given by the equation
What friction force must act on the bottom of the ladder to keep it from slipping? Neglect the small force of friction between the smooth wall and the ladder.
a saline soluton used in intravenous drips for patients who cannot take oral fluids contains 0.92% (W/V) NaCl in water . How many grams of NaCl are contained in 729ml of this soution.
A container with 644 mL of oxygen gas is at a pressure of 11.6 kPa. What pressure would be required to decrease the volume of the gas to 439 mL, assuming no temperature change?
The potential energy of a particle moving along the x axis is given by U(x) = 8x2 + 2x4, where U is in joules and x is in meters. If the total mechanical energy is 9.0 J, the limits of motion are:
Consider a simple transformer that has 100-turn primary coil and a 1000-turn secondary coil. What will be the voltage output of the secondary?
what is the concentration(M) of CH3OH in a solution prepared by dissolving 16.8 g of CH3OH in sufficient water to give exactly 230 mL of solution.
A 180 g block on a 40 cm-long string swings in a circle on a horizontal, frictionless table at 76 rpm. What is the speed of the block? what is the tension in the string?
If the animals can manage to hold on, what are their speeds as the rod swings through a vertical position?
What is the minimum coefficient of friction between tires and road that will allow cars to negotiate the turn without sliding off the road?
The three ropes shown are tied to a small, very light ring that is stationary. Two of these ropes are anchored to walls at right angles with the tensions shown in the figure. What is the magnitude
Assume that 3.0 mol oxygen (O2) is heated at constant pressure starting at 27°C. How much energy must be added to the gas as heat to double its volume?
A shopper in a supermarket pushes a loaded 31 kg cart with a horizontal force of 12 N. The acceleration of gravity is 9.81 m/s2 . a) Disregarding friction, how far will the cart move in 4.2 s, start
The compound As2I4 is synthesized by reaction of arsenic metal with arsenic triiodide. If a solid cubic block of arsenic (d 5.72 g/cm3) that is 3.00 cm on edge is allowed to react with 1.01 1024
A stone is dropped into a deep canyon and is heard to strike the bottom 4.48 s after release. How deep is the canyon? The speed of sound waves in air is 343 m/s and the acceleration of gravity is 9.8
How long, in seconds, does it take an automobile traveling 55.0 km/h to become even with a car that is traveling in another lane at 40.0 km/h if the cars' front bumpers are initially 130 m apart?
what is the pressure in torr that a 44.0g sample of carbon dioxide gas will excert at a temperature of 46.2 degrees celsuis when it occupies a volume of 5 L.
If the mass of the block is too large and the block is too close to the left end of the bar. What is the smallest possible value of x such that the bar remains stable (call it x_critical)?
Every 100.00 g of the compound SiH4 contains 87.45 g of Si and 12.55 g of H. Find the ratio of the atomic mass of S to the atomic mass of H.
A rifle bullet with a mass of 12.5 g traveling toward the right at 222 m/s strikes a large bag of sand and penetrates it to a depth of 21.3 cm. Determine the magnitude and direction of the friction
A good baseball pitcher can throw a baseball toward home plate at 85 miles per hour with a spin of 1800 revolutions per minute. How many rotations does it make on a path of 60 feet?
The block is spun at 50.0 rpm, then the temperature of the rod is slowly increased. When the wax melts, the block slides out to the end of the rod. What is the final angular velocity? Give your answ
A 1900 kg car starts from rest and drives around a flat 59 meter diameter circular track. The forward force provided by the car's drive wheels is a constant 1300 N.
(a) What are the forces acting on the top and on the bottom of the block? (Take P0 = 1.013 0 X 105 N/m2.) (b) What is the reading of the spring scale? (c) Show that the buoyant force equals the diff