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The edge length of the unit cell of potassium metal, K, is 533 pm; the unit cell is body-centered cubic (one atom at each lattice point). Potassium has a density of 0.856 g/cm3. What is the mass of
A cylindrical cable with 2.49 x 10-8 m resistivity carries a current of 1500 A. There is a potential difference of 1.8 x 10-3 V between two points on the cable that are 0.33 m apart. What is the radiu
A resister is connected to a 4.50 volt battery and the Current flow is 83 mA. (a.) What is the resistance of the resister? (b.) In what direction does the current flow through the resister?
What is the average force of the kinetic friction acting on the palace? what us tge palace's stopping distance?
A cylindrical tank is 50 ft deep, 39.5 ft in diameter, and filled up to the top with water. A flashlight shines into the tank from above. What minimum angle can its beam make with the water surface
Calculate the equilibrium Keq for the tRNA binding to the protein and Calculate the delta G knot for the binding. Remember to use full molar units (not mM) for Keq in this calculation.
A golf ball rolls off a horizontal cliff with an initial speed of 13.6 m/s. The ball falls a vertical distance of 12.0 m into a lake below. What is the speed v of the ball just before it strikes the
A skateboarder, starting from rest, rolls down a 12.0-m ramp. When she arrives at the bottom of the ramp her speed is 6.10 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant.
Determine the magnitude and direction of the theoretical resultant velocity of the athlete just before landing.
Calculate the mass of the water vapor pressure present in a room of volume 400m3 that contains air at 27 degrees C on a day when relative humidity is 60%.
Attach a copy of the graph of the average class data for "mass of barium sulfate versus volume of barium chloride." What is occurring before the graph levels off? What is indicated after the graph
While the spring is being compressed, what work is done on the block by the gravitational force on it? What work is done on the block by the spring force while the spring is being compressed?
A 17.5 g mass of ice at 273K is added to 125g of H2O(l) at 325K at constant pressure. Is the final state of the system liquid or ice? calculate ?S for the process. Is the process spontaneous ?
The punter on a football team tries to kick a football so that it stays in the air for a long "hang time." If the ball is kicked with an initial velocity of 25.2 m/s at an angle of 59.5° above t
If the vapor pressure of an aqueous solution of ethylene glycol C2H6O2 (62.06844 g/mol) was found to be 52.3 torr at 39.8 degrees C, calculate the grams of ethylene glycol used to make this solution
Gold is a very conductive and ductile metal. One gram of gold can be pulled into a wire 2 km long. The density of gold is 19.3 g/cm3 and the melting point is 1337.3 K. What is the diameter of this
An airplane is flying at a speed of 200m/s in level flight at an altitiude of 800 m . A package is to be dropped from the airplane to land on a target on the ground. At what horizontal distance away
Suppose a spacecraft is sent to study an object somewhere in our Milky Way galaxy. This spacecraft finds out that the object has a radius of 2576 km and a mass of 1.3452 x 1023 kg. Assuming the obje
In its brochure to customers that is required by the Safe Drinking Water Act, a water utility lists the concentration of Mg2+ as 1.8 mg/L. What are the molarity and normality of the magnesium ion i
It takes 10.00 ml of sodium hydroxide (aq) to titrate 6.216 g of KHP (HKC8H404) in water (M.W.KHP = 204.32g/mol) to the equivalence point using phenolphthalein indicator? What is the molarity of the
A vector has an x component of -21.5 units and a y component of 41.5 units. Find the magnitude and direction of the vector.
Calculate the magnitude of the net force on each due to the other two. Calculate the direction of the net force on each due to the other two.
What problem would you encounter if the unknown component was acetaminophen rather than acetanilide or phenacetin, and you extracted the aspirin with 5 % NaOH? Explain, giving equations for any rele
An arrow, starting from rest, leaves the bow with a speed of 24.0 m/s. If the average force exerted on the arrow by the bow were doubled, all else remaining the same, with what speed would the arrow
How many milliliters of concentrated sulfuric acid of specific gravity 1.84 and containing 98% H2SO4 by weight should be used to make 1 liter of one normal (1 N) solution?