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A 95g arrow is fired from a bow whose string exerts an average force of 125 on the arrow over a distance of 83cm. What is the speed of the arrow as it leaves the bow?
You're on a rooftop and you throw one ball downward to the ground below and another upward. The second ball, after rising, falls and also strikes the ground below. If air resistance can be neglecte
The force exerted by the wind on the sails of a sailboat is 370 N north. The water exerts a force of 250 N east. If the boat (including its crew) has a mass of 250 kg, what are the magnitude and di
The loaded cab of an elevator has a mass of 2.7 x 103 kg and moves 198 m up the shaft in 27 s at constant speed. At what average rate does the force from the cable do work on the cab?
The tire is filled with dry air at sea level and a temperature of 60 degree F to 32 lb/square inch.standard sea level pressure is 101325 Pa at 0 degree C (STP). What is the mass of the air contained
A charge of 4.0 x 10^-6 C is placed on a small conducting sphere that is located at the end of a thin insulating rod whose length is 0.20 m. The rod rotates with an angular speed of 150 radians/seco
A force of 5 pounds is required to hold a spring stretched 0.6 feet beyond its natural length. How much work is done in stretching the spring from its natural length to 1.1 feet beyond its natural l
An elevator has a mass of 1100 kg. Suppose it accelerates upward at .45 m/s2. What is the force acting on the elevators support cable?
One end of an iron poker is placed in a fire where the temperature is 500°C, and the other end is kept at a temperature of 26°C. The poker is 1.2 m long and has a radius of 5.0 10-3 m. Ignor
A solid sphere (I = 0.4MR2) of radius 0.06 m and mass 0.50 kg rolls without slipping 14m down a 30º inclined plane. At the bottom of the plane, the linear velocity of the center of mass of the
A(n) 74.6 g ball is dropped from a height of 69.6 cm above a spring of negligible mass. The ball compresses the spring to a maximum displacement of 4.91619 cm. The acceleration of gravity is 9.8 m/s
The mass of ethanol needed to fill the tube is found to be 9.64g. Calculate the inner diameter of the tube in centimeters. The density of ethanol is 0.789 g/mL.
A 230 kg crate is pushed horizontally with a force of 740 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.
If one of the masses of the Atwood's machine below is 2.8 kg, what should be the other mass so that the displacement of either mass during the first second following release is 0.34 m? Assume a mass
A 6.50 x 10^-5 M solution of potassium permanganate has a percent transmittance of 27.3% when measured in a 1.15-cm cell at a wavelength of 525 nm. Calculate the absorbance of this solution.
A skier is accelerating down a 30.0 ^circ hill at 1.80{rm{m/s^2}}. How long will it take her to reach the bottom of the hill, assuming she starts from rest and accelerates uniformly, if the elevati
A staging that weighs Wstaging supports a painter weighing 680 N. The reading on the left scale is 740 N and the reading on the right scale is 440 N. What is the weight of the staging?
A 3 gram bullet is fired horizontally into and remains in, a 16 kg block of wood suspended by a rope from the ceiling. The block swings in an arc, rising 4mm above its lowest position. What was the
An experimental rocket car moves along a straight track at a constant speed of 900.0m/s. The car passes a group of officials, travels a distance of 270.0 m and then explodes. If the officials hear t
A bag of blood with a density of 1050 kg/m^3 is raised about 1.00 m higher than the level of a patient's arm. How much greater is the blood pressure at the patient's arm than it would be if the bag
calculate the work done (in joules) when 34.1g of tin dissolves in excess acid at 1.03 atm and 25C. Assume ideal gas behaviour.
The energy difference in these two conformations has been measured to be about 23 kJ per mole. How much of this energy difference is due to the torsional energy of gauche relationships? Express your
By how much is the wind slowed when going through the turbine? Temperature of the air is 300K and its pressure is 1 bar. Air can be considered an ideal gas with Cv= 5R/2.
What is the car's maximum speed on an incline of 1 in 20 (ie, if theta is the angle of the incline with the horizontal, sin = 1/20)?
Calculate the number of kilograms of helium required to inflate a balloon with a volume of 100.000 L at a pression of 250 mmHg and atmospheric temperature of -35 ° C.