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The car is moving with a constant velocity. At a time t = 18 s, the car just reaches the front of the train. Ultimately, however, the train pulls ahead of the car, and at time t = 36 s, the car is a
The magnitude of the force on q1 due to q2 equals the magnitude of the force on q1 due to the electric field of the parallel plate capacitor. What is the distance r between the two charges?
An astronaut lands on a distant planet and performs an experiment to determine the local value of g, the acceleration due to gravity. They construct a simple pendulum of length 0.50m.
Two cars are traveling at equal speeds but in opposite directions. One car sounds its horn at a frequency of 111 Hz, which the other driver hears as a frequency of 105 Hz. What is the speed of each
Enormous numbers of microwave photons are needed to warm macroscopic samples of matter. A portion of soup containing 295 g water is heated in a microwave oven from 26°C to 87°C, with radiati
A man can throw a ball a maximum horizontal distance of 142 m. The acceleration of gravity is 9.8 m/s2 . How far can he throw the same ball vertically upward with the same initial speed?
Two loudspeakers, A and B, are driven by the same amplifier and emit sinusoidal waves in phase. The frequency of the waves emitted by each speaker is 860 Hz. Point P is 12.0 m from A and 13.4 m from
For 1000-Hz waves in air, what displacement amplitude would be needed for the pressure amplitude to be at the pain threshold, which is 30 Pa?
The largest watermelon ever grown had a mass of 118 kg. Suppose this watermelon were exhibited on a platform 5.oo m above the ground. After the exhibition , the watermelon is allowed to slide along
Calculate the composition of the vapor phase at 25 °C if the vapor above the liquid phase is composed only of 1-propanol and 2-propanol.
Now consider a second inclined plane with the same tilt angle for which the coefficient of kinetic friction between the block and the plane is muk = 0.15. What initial speed now is required for the
A mixture of propane in air containing 4.03 mole% C3H8 is the feed to a combustion furnace. If there is a problem in the furnace, the mixture is diluted with a stream of pure air to make sure that i
Two blocks of mass m1 = 15 kg. and m2 = 9 kg. are pushed against each other (m1 on top) and sliding down an incline of 35 degrees. a) If the plane is frictionless, what is the normal force between t
A man enters a tall tower, needing to know its height. He notes that a long pendulum extends from the ceiling almost to the floor and that its period is 18.0 s. How tall is the tower? If this pendul
The coefficient of static friction between block m1 and the inclined plane is mu (s) = 0.25. What is the largest mass for m1 for which the blocks will remain at rest?
A reaction has a standard free-energy change of -13.90 kJ mol-1 (-3.322 kcal mol-1). Calculate the equilibrium constant for the reaction at 25 °C.
An airplane has a velocity relative to the air of 200 m/s in a westerly direction. If the wind has a speed relative to the ground of 60 m/s directed to the north, what is the speed of the airplane r
How far does the ball drop due to effects of gravity by the time it reaches home plate? (Ignore any effects due to air resistance and assume you throw the ball horizontally.)
A stone thrown horizontally from the top of a 12-m tower hits the ground at a point 19 m from the base of the tower. (Ignore any effects due to air resistance.) (a) Find the speed at which the ston
If you wanted to prepare a solution of CO in water at 25 in which the CO concentration was 2.1 mM , what pressure of CO would you need to use?
The Steeler kicker wants to kick a football through the uprights from a distance of 30 m. (okay - it's metric football). The kicked football has a velocity of 25 m/s at an angle of 30 degrees. Will
Nitric acid is often manufactured from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming of natural gas, in a two-step process. In the first step, nitrogen and hydrogen
Two wheels of mass m and moment of inertia I are connected by a massless axle of length L. The system rests on a frictionless surface and the wheels rotate without frequency ω around the axle.
The activation energy of a certain reaction if 65.7kJ/mol. How many times faster will the reaction occur at 50 degrees Celsius than at 0 degrees Celsius? State the assumptions you need to make in o
A mixture of methane and water vapor pressure is passed over a nickel catalyst at 1000K. The emerging gas is collected in a 5.00L flask and is found to contain 8.62g of carbon monoxide, 2.60g of hyd