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A large box whose mass is 20 kg rests on a frinctionless floor. A mover pushes on the box with a force of 250 N at an angle of 35 degrees below the horizontal. What is the acceleration of the box a
It takes 480. J of energy to raise the temperature of 103.1 g mercury from 20.0°C to 53.5°C. Calculate the specific heat capacity and the molar heat capacity of mercury.
The stone is moving around the path at a constant frequency of 2.20 rev/sec. At the moment the stone is overhead, the stone is released. The magnitude and direction of the velocity of the stone when
a sample of of myoglobin with mass 1.00g is dissolvd in 100ml of aqeous solution. Theosmotic pressure of the solution is 11.0 torr at 25.00degree celcius . find the molar mass of myoglobin ?
A 4.00-kg model rocket is launched, expelling 60.0 g of burned fuel from its exhaust at a speed of 670 m/s. What is the velocity of the rocket after the fuel has burned?
A 61.9 kg person jumps from rest off a 2.86 m-high tower straight down into the water. Neglect air resistance during the descent. She comes to rest 1.13 m under the surface of the water. Determine t
a 244 g particle is released from rest at point A inside a smooth hemispherical bowl of radius 35.2 cm, calculate the gravitational potential energy at relative to B
If the river velocity is 40 cm/sec and the longitudinal dispersion coefficient is0.1 m2/ sec, what is the maximum concentration expected at the plant.
What is the acceleration of two falling sky divers (mass 106.0 kg including parachute) when the upward force of air resistance is equal to one-fourth of their weight?
What is the density of silver if a solid ingot has a volume of 50 cm^3 and a mass of 525g
The half life for the first order decomposition if this compound is 20500 s. how long will it take for a sample of N2O5 to decay to 60% of its initial value?
The blade of a windshield wiper moves through an angle of 90.0 in 0.46 s. The tip of the blade moves on the arc of a circle that has a radius of 0.37 m. What is the magnitude of the centripetal acce
You are designing a drier that must evaporate 200 lb/h of H2O from sludge by using air. Air at 70°F and 50% relative humidity is drawn into the drier and it leaves at 140F and 70% relative humid
If the sample had not been filtered, how much of this chemical would have been measured? Express in terms of measured concentration C (mg/litre) of the filtered sample?
The second-order diffraction (n = 2) for a gold crystal is at an angle of 22.20° for X rays of 154 pm. What is the spacing between these crystal planes?
A river flows due east at 1.70 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 15.0 m/s due north relative to the water. a) What is the v
A sealed syringe contains 5cc of oxygen gas under 14.7psi of pressure. If the pressure on the syringe is increased to 36.8psi, but the temperature remains constant, what is the volume of the oxygen
What is the new temp. in degrees celsius, when the volume of the sample is charged at constant pressure and volume of 6.00L
A child is riding a merry-go-round which completes a revolution every 8.36 s. The child is standing 4.65 m from the center of the merry-go-round. What is the magnitude of the centripetal acceleratio
Calculate the value (calories) for the heat of solution of 4.00 g of NaOH. Calculate the number of calories that would be produced if one mole of sodium hydroxide was dissolved.
How much work is done (a) by the block on the spring and (b) by the spring on the block? (c) What is the value of h0? (d) If the block were released from height 3h0 above the spring, what would be t
A 2.80-cm diameter coin is placed a distance of 25.0 cm from a convex mirror which has a focal length of -12.0 cm. Determine the image distance and the diameter of the image.
A solution of 350mg of optically active 2-butanol in 10 mL of water, placed in a 20 cm cell shows an optical rotation of +6 .24o. What is the specific rotation of this compound?
What mass of water (in grams)is contained in 2.8L of the vapor above this solution at 55 celcius? the vapor pressure of pure water at 55 celcius is 118 torr.
A vertical cylindrical cylinder, closed at the bottom end, contains 0.0100 moles of gas. It is fitted at the top with a piston, which can move freely. The mass of the piston is 14.0 kg and the init