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An iron nail with a mass of 12g absorbs 15J of heat. If the nail was initially at 28oC, what is its final temperature?
A 180 g, 37.0-cm-diameter turntable rotates on frictionless bearings at 65.0 rpm. A 24.0 g block sits at the center of the turntable. A compressed spring shoots the block radically outward along a
A race car starting from rest accelerates uniformly at a rate of 4.90 meters per second2. What is the car's speed after it has traveled 200.0 meters?
If a 1.00 kg sample of sand containing some gold has a density of 3.10 g/mL (without air spaces), what is the percentage of gold in the sample?
Find the magnitude and direction of the velocity of the heavier fragment relative to the ground just after the explosion. Please provide step-by-step method to solve the problem.
A woman walks due west on the deck of a ship at 4 mi/h. The ship is moving north at a speed of 18 mi/h. Find the speed and direction of the woman relative to the surface of the water. (Round your a
Assuming your trunk of your car were filled with four gas cylinders that are four feet long and have a diameter of 10 inches, what are the total moles of CNG you could hold in your trunk in these ta
Write down the dissolution equation for nickel(II) perchlorate dissolving in water. (Perchlorate is a polyatomic ion with the formula ClO41-.) If four moles of the ionic compound are dissolved, then
A high-school pitcher is employing a ballistic pendulum to determine the speed of his fastball. A 3.3-kg lump of clay is suspended from a cord 2.0-m long.
A bat emits a sound whose frequency is 82.8 kHz. The speed of sound in air at 20.0 oC is 343 m/s. However, the air temperature is 38.7 oC, so the speed of sound is not 343 m/s. Assume that air behav
A particle of mass 4.12 × 10-27 kg, moving at 4.62 × 105 m/s, strikes an identical particle which is initially at rest. After the interaction, the particles (which can't be distinguished
The heat capacities of H2O(s) and H2O(l) are 2.08 and 4.18 J/g°C, respectively, and the enthalpy of fusion for ice is 6.02 kJ/mol.
Determine how much heat is evolved or absorbed when 30.0g of lithium iodide completely dissolves in water.
The atmospheric pressure at the top of the mountain is 1.7 atm. The car is driven down to sea level, where the atmospheric pressure is 1.0 atm and the air inside the tire is heated to 350 K. At sea
What type of spectrum would you expect to see from the glowing parts of the nebula? Why?
How many grams of pure, solid NaOH are required to make 500 mL of 0.15M NaOH solution? Express your answer to 2 significant figures, e.g. 3.3 g.
An Atwood machine consists of two masses, = 6.6 and = 8.0 , connected by a cord that passes over a pulley free to rotate about a fixed axis. The pulley is a solid cylinder of radius = 0.40 and mass
Does the polarity of the solvent of the various solvent mixtures seem to affect the completeness of the separation of dyes? Why might this be so?
The analysis of a compound showed that it contained 0.903 mol of C, 0.0430 mol of H, 0.602 mol of O, and 0.301 mol of N. How many Nitrogen atoms are there in the empirical formula for this compound?
A loudspeaker of mass 22.0 {rm kg} is suspended a distance of h = 2.20 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.10 {rm m}.
A baby grand piano with a mass of 285 kg hangs from two cables. The angle between the horizontal and the left cable is 27 degrees. The angle between the horizontal and the right cable is 45 degrees
A diving board of length 3.00 {rm m} is supported at a point 1.00 {rm m} from the end, and a diver weighing 550 {rm N} stands at the free end . The diving board is of uniform cross section and weig
World-class sprinters can accelerate out of the starting blocks with an acceleration that is nearly horizontal and has magnitude 15m/s^2. How much horizontal force F must a sprinter of mass 62.0 kg
Consider a homogeneous gallium arsenide semiconductor at T = 300 K with Nd = 1016 cm-3 and Na = 0. Calculate the thermal-equilibrium values of electron and hole concentrations.
An 88g arrow is fired from a bow whose stringht exerts an average force of 110N on the arrow over a distance of 78cm. What is the speed of the arrow as it leaves the bow?