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when 105mL of water at 22C is mixed with 68mL of water at 95C, what is the final temperature? Assume no heat is lost to the surroundings and density of water is 1.00g/mL
How much later does it reach the bottom of the cliff? What is its speed just before hitting? What total distance did it travel?
An extension cord made of two wires of diameter 0.129 cm (no. 16 copper wire) and of length 3.4 m is connected to an electric heater which draws 17.5 A on a 120 V line. How much power is dissipated
A spring with k = 55 N/m hangs vertically next to a ruler. The end of the spring is next to the 15 cm mark on the ruler. If a 2.1 kg mass is now attached to the end of the spring, where will the en
Six artificial satellites circle a space station at constant speed. The mass m of each satellite, distance L from the space station, and the speed v of each satellite are listed below. The satellite
The distance from the Earth to Polaris is approximately 7.576 10^18 m. How long would it take to disappear from our vision if it were to burn out today? Answer in units of years.
Young's double-slit experiment is performed with 582 nm light and a distance of 2.00 m between the slits and the screen. The tenth interference minimum is observed 7.72 mm from the central maximum.
A rope is tied to a 46.0kg box on frictionless ice. What is the tension of the rope if the box is at rest? the box moves at a steady vx=5.20m/s? the box vx=5.20 and ax=5.2m/s^2?
A submarine dives 120.0 m at an angle of 8.0° below the horizontal. What are the horizontal and vertical components of the submarine's displacement? (Assume that upward and the direction of the
Consider the system shown in the figure below with m1 = 24.0 kg, m2 = 14.6 kg, R = 0.140 m, and the mass of the pulley M = 5.00 kg. Object m2 is resting on the floor, and object m1 is 4.60 m above t
Discuss to what extent nature ( inherited or genetic factors ) contribute to a person,s development (biological, emotional , cognitive and social development) and to what extant it is the result of
A certain loudspeaker has a diameter of 45 cm. At what frequency will the wavelength of the sound it emits in air be equal to its diameter?
Coherent light that contains two wavelengths, 660 nm and 470 nm , passes through two narrow slits with a separation of 0.350 nm and an interference pattern is observed on a screen which is a distan
You and a friend each drive 50.0 km. You travel at 85.0 km/h; your friend travels at 98.0 km/h. How long will your friend wait for you at the end of the trip?
A proton moves at a speed of 8.0 103 m/s as it passes through a magnetic field of 0.55 T. Find the radius of the circular path. Note that the charge carried by the proton is equal to that of the ele
A race car has a mass of 719 kg. It starts from rest and travels 36.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?
What is Fx if the magnitude of the skier's velocity is (a) constant, (b) increasing at a rate of 1.0 m/s2, and (c) increasing at a rate of 2.0 m/s2.
What is the EMF in the secondary circuit? B. The current in the secondary circuit is 0.50 A. What current is in the primary circuit?
Two sound waves, from two different sources with the same frequency, 495 Hz, travel in the same direction at 339 m/s. The sources are in phase. What is the magnitude of the phase difference of the
What minimum constant acceleration does this require if the aircraft is to be airborne after a takeoff run of 290 m?
The crane that is doing the lifting produces a steady power of 4.00 102 W. How much time does it take to lift the piano?
A ceileing fan is turned on and reaches an angular speed of 120 rev/min in 20 s. It is then turned off and coasts to a stop in 40 s. In the one minute of rotation, through how many revolutions did
Two wires are identical, except that one is aluminum and one is iron. The aluminum wire has a resistance of 0.18 . What is the resistance of the iron wire?
if it takes 85 Joules of work to stretch a spring 2 meters beyond its natural length, how much work is required to stretch the spring 10 meters beyond its natural length?
A space traveler weighs 691 N on Earth. What will the traveler weigh on another planet whose radius is 3 times that of earth and whose mass is 4 times that of earth?