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A stone is trown vertically downward at an initial speed of 14m/s from a height of 65m above the ground.How far does the stone travel in 2.0s and what is the velocity just before it hits the ground?
First, what is the error in my measurement of 18 rotations?(For the number use two digits to the right of the decimal point.
How to calculate the mass of propylene glycol (C3 H8 O2 ) that must be added to 0.350 kg of water to reduce the vapor pressure by 2.87 torr at 40 C (P H2O at 40 C} = 55.3 torr?
In one experiment, when the barametric pressure was 741.0 torr, the bubble trapped in the inverted graduated cylinder was found to occupy 6.15 mL at 3.0 oC and 16.0 mL at 61.0 oC.
A 890kg electric car uses a 270V battery pack. As the car accelerates from rest, 450C flows from the battery. What's the maximum speed the car can attain during this time?
Liquid benzene and liquid n-hexane are blended to form a stream flowing at a rate of 700 lb_m/hr. The blended stream has a density of 0.850g/mL.
How much work must be done to extract 1.5 J of heat from a reservoir at 7.0 deg C and transfer it to one at 26.0 deg C by means of a refrigerator using a Carnot cycle.
Solution A: 0.14g of the solute dissolves in 15.4 g of t-butanol. Solution B: 0.17 g of the solute dissolves in 12.7 g of cyclohexane. Which solution has the greatest freezing point change? Explain
A 0.442 g sample of a nonvolatile solid solute dissolves in 15.0 g of t-butanol. The freezing point of the solution is 23.9 degrees Celcius. What is the molality of the solute in the solution.
A sample of gaseous neon atoms at atmospheric pressure and 0 C contains 2.60*10^22 atoms per liter. The atomic radius of neon is 69 pm. What fraction of the space is occupied by the atoms themselve
The volume of a typical bacterical cell is on the order of 1.0 cubic microns. At pH 7.0 how many hydrogen ions are contained inside a bacterial cell?
The amino acid glycine is often used as the main ingredient of a buffer in biochemical experiments. The amino group of glycine, which has a pKa of 9.6, can exist either in the protonated form (-NH3+
Tom the cat is chasing Jerry the mouse across the surface of a table 1.2 m above the floor. Jerry steps out of the way at the last second, and Tom slides off the edge of the table at a speed of 4.6
If the combined effect of air resistance and rolling friction causes a deceleration of 0.50m/s^2, after how long will the car come to rest?
What would be similar about a raft full of chemistry students and some of the cans of soda that would make them both float on the water? What would be different about the cans of soda which sank to
Assume both strips were equally charged and the charge is located at the middle of the strip. Calculate an order of magnitude value for the number of excess electrons on one strip of tape. show calc
The solvent for an organic reaction is prepared by mixing 70.0 of acetone () with 58.0 of ethyl acetate (). This mixture is stored at 25.0 . The vapor pressure and the densities for the two pure com
A flat surface having an area of 3.4 m^2 is rotated in a uniform electric field of magnitude E = 6.1e5 N/C.
Suppose that 500 g of water vapor condense to make a cloud about the size of an average room. If we assume that the latent heat released is 2.5X106 J kg-1, how much heat would be released to the air
In the sport of curling, large disks of granite are pushed on ice. When you push a curling stone with a force of 80N, it accelerates at 4 m/s^2. What is the mass of the curling stone? (assume there
Suppose you are given 1 kg of ice at 0°C. If the ice is placed in an insulated container holding 1 kg of water initially at 20°C, how much of the ice will melt?
(a) What is the electric potential at the origin? (b) What is the electric potential at the point on the z axis at z = a?
A proton accelerates from rest in a uniform electric field of 620 N/C. At some later time, its speed is 1.4e6 m/s. (a) Find the magnitude of the acceleration of the proton.
Naturally occurring iodine has an atomic mass of 126.9045. A sample of 12.3849g gets contaminated with 1.00070g of a synthetic iodine with a mass of 128.9050. Find the apparent "atomic mass of the
A metal sphere weighing 18.48g is added to 20.00mL of water in a graduated cylinder. If the density of the metal is 4.50g/mL, what will be the new level of water in the graduated cylinder?