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A stone of mass 0.31 kg is tied to a string of length 0.50 m and is swung in a horizontal circle with speed v. The string has a breaking-point force of 45 N. What is the largest value v can have wi
How many elastic scatters, on the average, are required to slow a 1-MeV neutron to below 1 eV in (a) 16O and in (b) 56Fe?
Only 1.40 mg of pure penicillin having an activity of 280 cpm was recovered. What was the penicillin content of the original 5.00 kg of crude penicillin?
A quarterback takes the ball from the line of scrimmage, runs backward for 7.50 yards, and then runs sideways parallel to the line of scrimmage for 15.0 yards. At this point, he throws a forward pas
A racing car travels with a constant tangential speed of 75 m/s around a circular track with a radius 625 m. Find (a) the magnitude of the car's total acceleration and (b) the direction of its tota
A 88.0 N grocery cart is pushed 13.0 m along an aisle by a shopper who exerts a constant horizontal force of 40.0 N. If all frictional forces are neglected and the cart starts from rest, what is th
A 0.20 M solution of MgSO4 has an observed osmotic pressure of 7.6 atm at 25oC. Determine the observed van't Hoff factor for this experiment. A) 19 B) 0.31 C) 1.6 D) 1.8 E) 2.0
A 20.0 child plays on a swing having support ropes that are 2.30 long. A friend pulls her back until the ropes are 43.0 from the vertical and releases her from rest.
Exerting a force of 79 N on the circular piston of a syringe causes a pressure increase in the barrel of 1.4 atm. What is the diameter of the piston?
A sample of sodium fluoride produced 26.5 {rm g} of sodium upon decomposition. How much fluorine (in grams) was formed?
What is the instantaneous power P delivered to the wheel via the force F_vec at time t = 0? Express the power in terms of some or all of the variables given in the problem introduction.
Find an expression for the electric field strength outside the sphere, r> R.
To what volume should you dilute 0.05 L of a 5.00 M KI solution so that 0.025 L of the diluted solution contains 3.25 g of KI? (Find the M of the new KI solution first, then proceed to use the M1V1
A ball is projected upward at time = 0.0 s, from a point on a roof 50 m above the ground. The ball rises, then falls and strikes the ground. The initial velocity of the ball is Consider all quantit
A sample consisting of 1.0 mol of a a Van der walls is compressed from 20.0dm3 to10.0 dm3 at 300K. calculate Delta H for the process.
You have at your disposal 100.0mL of 0.650M HCl and 500.0 mL of 0.300 M NaOH. How many mL of the base have to be added to the full volume of the acid to reach a pH of 1.90?
Please calculate the percent of Earth's gravitational force on the Shuttle astronauts while orbiting at an altitude of 248 miles (or 399 km) above Earth's surface. To do this, compare the gravitati
The cart is released from rest, allowing it to roll, pulled by the falling hanger. What is the formula for the acceleration a of the cart in terms of the cart's mass M, the hanger's mass m, and the
Calculate the change in entropy of the universe when 1 mol of water vapor at 100°C condenses to liquid water at 100°C in a thin flask in an ambient laboratory temperature of 25°C.
A pitcher throws a curveball that reaches the catcher in 0.59 s. The ball curves because it is spinning at an average angular velocity of 380 rev/min (assumed constant) on its way to the catcher's
a typical person has about 200 mg of cholesterol per 100 ml of blood.if the total blood volume of an individual is 5.0 L,how many grams of total blood cholesterol does the individual contain?
The specific heat of air at normal pressure is 1.015J/g.C. What is the change in air temperature, assuming the heat from the steam is all absorbed by air?
A 0.570-kg ball is dropped from rest at a point 4.40 m above the floor. The ball rebounds straight upward to a height of 3.20 m. Taking the negative direction to be downward, what is the impulse of
The magnitude of F is 306 newtons and it points at 93o measured counterclockwise from the positive x-axis. What is the y component (in newtons) of F?
A parachutist with a camera, both descending at a speed of 11 m/s, releases that camera at an altitude of 140 m. What is the velocity of the camera just before it hits the ground?