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Consider a tennis player who hits a serve at 140 mi/h (63 m/s). Estimate the average force exerted by the racket on the ball (m=57g)?
Find the minimum speed at which a car can travel around this curve without skidding if the coefficient of static friction between the road and the tires is 0.7. Answer in units of m/s.
Assume you could titrate to the third equivalence pt ofH3PO4. What would be the relationship of Volume at equivalence pt 3 to V equiv. 2 to V equiv. 1?
A solution with 0.10M of sodium propipnate, and another solution contains 0.12M hydrofluric acid and 0.10M sodium floride.Which of these solution is a buffer solution? State the reason PLZ?
If the ball has a speed of 3.0 m/s just before striking the floor and a speed of 2.5 m/s just after bouncing, what is the average force of the floor on the ball? Assume the ball is in contact with t
A projectile is launched horizontally. It travels 2.050m horizontally and 0.450m vertically in the Earth's gravitational field before it hits the ground. a. What is the initial velocity of the proje
A jogger accelerates from rest to 2.7 m/s in 2.7 s. A car accelerates from 36.0 to 44.0 m/s also in 2.7 s. the acceleration (magnitude only) of the jogger is 1 m/s^2.
How long in hours, must a current of 2.4 amperes flow in order to deposit 9.50 grams of copper, Cu (s) from a solution of Cu(NO3)2? the molar mass of copper is 63.5 g/mol.
What phase difference between two otherwise identical traveling waves, moving in the same direction along a stretched string, will result in the combined wave having an amplitude 0.72 times that of
If 876 coulombs of electricity is used to reduce Cr3+ to Cr (s), how many grams of chromium will be deposited at the cathode?
If these two runners had run in the same race, each running the entire race at the average speed that earned him a place in the record books, el-Guerrouj would have won. By how many meters?
A ball rolling along a floor doesn't continue rolling indefinitely. Is it because it is seeking a place of rest or because some force is acting upon it? If the latter, identify the force.
How long would it take (in seconds) to deposit 1.97 g of copper from an aqueous solution of copper(II) sulfate by passing a current of 2.44 amperes through the solution?
The total race is fifty meters long. If the total race is run in 6.32 s, How far does he run during the acceleration phase?
A projectile is fired horizontally with an initial velocity of 9.00 m/s near the earth's surface. Assume that the projectile does not collide with anything. a. What is the horizontal displacement of
How many grams of solid ammonium chloride would you have to add to2.5 L of .125 M NH3 to obtain a buffered solution of pH= 8.350? (Kb of NH3 = 1.8 *10-5)
An interstellar dust grain, roughly spherical with a radius of 3e-07 m, has acquired some negative charges such that the potential on its surface relative to infinity is -16 V. Assuming that the cha
Determine the empirical formula of a 100 g sample of acompound found to contain 63.50 g of silver. 8.25 g of nitrogen,and the remainder of oxygen.
A sample of gas collected over water at 42 degrees celsiusoccupies a volume of one liter. The wet gas has a pressure of0.986atm. The gas is dried, and the dry gas occupies 1.04L with apressure of 1.
(a) What is the angular speed of the rod just before it strikes the floor? (b) What is the magnitude of angular acceleration of the rod just before it strikes the floor?
Suppose the cannon is then unbolted from the earth, and no external force hinders its recoil. What would be the velocity of a shell fired from this loose cannon?
Nitroglyerine is an explosive used by the mining industry. It detonates according to the following equation:4C3H5N3O9(l)→ 12CO2(g) + 6N2(g) +10H2O(g) + O2(g) what volume is occupied by the gases
You have analyzed a 25.00 mL sample of fruit juice, which you titration with a 0.009986 M iodine solution. Your initial buret reading is 15.28 mL and your final buret reading is 20.12 mL.
What time is required to fully discharge the capacitor? The capacitor is fully discharged when the charge is less than 0.01 % which roughly corresponds to a time of 10t.
What is the maximum distance that the plane can travel due west and just be able to return home?