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A patient needs to take 625mg of ibuprofen twice daily. The pills in the bottle are each 250. mg. How many pills does the patient need to take each time she wants the 625mg dosage? Assume that these
A car traveling 80 km/h slows down at a constant 0.50 m/s^2 just by "letting up on the gas." Calculate the distance the car coasts before it stops in meters.
A 2400 kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 3.00 m before coming into contact with the top of the beam, and it drives the beam 13.0 cm farther into
A long straight metal wire of radius r1= 3.30E-2 m is surrounded by a metalic cylindrical shell of inner radius r2= 1.39E-1 m and outter radius r3= 1.84E-1 m. The axes of the wire and the cylindric
After heating, the evaporating dish and dry NaCl have combined mass of 25.50 g. How many grams of sodium ion Na+ are in 1.50g toothpaste?
A tennis ball of mass 57 g travels with velocity < 68, 0, 0 > m/s toward a wall. After bouncing off the wall, the tennis ball is observed to be traveling with velocity < -62, 0, 0 > m/s
What would have happened to the measured volume of the hydrogen gas collected if you did not wait 3 minutes after the process ended to record the new volume?
Moon effect. Some people believe that the Moon controls their activities. The Moon moves from being directly on the opposite side of Earth from you to be being directly overhead. Assume that the Ear
A step-up transformer has 300 turns on its primary coil and 90,000 turns on its secondary coil. If the current flowing through the secondary is .5 amps. What is the current flowing in the primary?
A pharmacist is to prepare 15ml of special eye drops for a glaucoma patient. The eye-drop solution must have a 2% active ingredient, but the pharmacist only has 10% solution and 1% solution in stock
A force vector points at an angle of 77° above the +x axis. It has a y component of 281 newtons. Find the magnitude of the force vector.
A mixture of gases contains 6.85 g of N2, 1.95 g of H2, and 5.71 g of NH3. If the total pressure of the mixture is 1.83 atm, what is the partial pressure of each component?
A beaker has a mass of 225.08 g. When a liquid is added to the beaker, the combined mass is 238.254 g. What is the mass in grams of the liquid .
A .5865 g sample of lattice acid is burned in a calorimeter whose capacity is 4.812 Kj/c. The temp raises from 23.10c to 24.95c.
A dog sits 3.0 m from the center of a merry-go-round. What is the angular speed of the merry-go-round?
What is the maximum speed with which a 1050- car can round a turn of radius 77 on a flat road if the coefficient of static friction between tires and road is 0.90?
A Federation starship (2.0 106 kg) uses its tractor beam to pull a shuttlecraft (4.0 104 kg ) aboard from a distance of 20 km away. The tractor beam exerts a constant force of 4.0 104 N on the shutt
Calculate the mass percent, molality, mole fraction, and normality of the citric acid. Citric acid has three acidic protons.
Bromine has Pvap = 400 mm at 41.0 °C and a normal boiling point of 331.9 K. What is the heat of vaporization, ΔHvap, of bromine in kJ/mol?
What is the free-fall acceleration on a planet where the period of a 1.06 m long pendulum is 2.72 s?
A baseball player pitches a fastball toward home plate at a speed of 43 m/s. The batter swings, connects with the ball of mass 143 g, and hits it so that the ball leaves the bat with a speed of 38 m
A flight attendant pulls her 73 N flight bag a distance of 220 m along a level airport floor at a constant velocity. The force she exerts is 41 N at an angle of 58° above the horizontal. What i
Lysozyme is an enzyme used to cleave cell walls. A solution made by dissolving 0.0750 g of lysozyme in 100.0 mL results in an osmotic pressure of 1.32 x 10-3 atm at 25 °C. Calculate the molar ma
If the pressure builds to 3.75 atm at a temperature of 21.1oC, what is the final volume of the bag after 4.97 minutes?
A model rocket is launched straight upward with an initial speed of 30.0 m/s. It accelerates with a constant upward acceleration of 2.50 m/s2 until its engines stop at an altitude of 170 m. (a) Wha