a. pi/15 m b. 15/pi m c. 60pi m d. 4.2 m e. 30 m
a. pi/15 m b. 15/pi m c. 60pi m d. 4.2 m e. 30 m
A car of mass 1.31* 10^3 kg is initially moving on a level road at a speed of 16.0 m/s. Compute the increase in temperature of the brakes, assuming that all the mechanical energy ends up as internal...
Suppose that by stirring 495 g of water you are able to increase its temperature from 19.0° C to 21.0° C. Find the increase in the water's entropy. answer in J/K
Ice of mass 12.0 kg at 0.00° C is placed in an ice chest. The ice chest has 2.80 cm thick walls of thermal conductivity 1.00 10-5 kcal/s · m · C° and a surface area of 1.20 m2.( a) How much heat...
does a planet travel faster when it is nearer the sun or farther from the sun? what is the gravitational attraction between a dating couple sitting 0.152 m apart if the boy weighs 715...
Question: At a water park, Hugo climbs a 15.00m springboard, in 22.00s, to execute his famous THUNDER CANNON BALL. Hugo jumps up at 6.000m/s [up] off the end of the diving board and propels his mass,...
A sinker on a string travels in a circle of radius1.00 m with a constant speed of 2.75 m/s. What is its acceleration?
Jupiter has a mass of 1.90 x 1027 kg. the semi-major axis of its orbit is 7.78 x 1011. Th radius of the planet is 7.14 x 107 m. Io, one of jupiter's moons, orbits at a distance...
Question: At a water park, Hugo climbs a 15.00m springboard, in 22.00s, to execute his famous THUNDER CANNON BALL. Hugo jumps up at 6.000m/s [up] off the end of the diving board and propels his mass,...
If a heat engine takes in 957 watts of heat from a source at a temperature 1,000 kelvin and dumps off 126 watts of heat to a heat sink at 300 kelvins. What is the efficiency of the heat engine?
Mercury orbits the sun with an average speed of 4.78 x 104 m/s. About how long does Mercury take to orbit the sun once if the radius of its almost circular orbit is 5.79 x 1010m?
True or false: Newton's laws apply only to reference frames that are not accelerating.
Hello, I'm really hoping someone can help me with this one. I really don't know how to do it. Using the voltage law (Kirchhoff's), show that the voltage at input may be written...
An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gases called air. If the flask volume is 0.00415 m3 and the air is at standard temperature...
A volume of nitrogen gas has a density of 1.15 kg/m3 and a pressure of 1.01 atm. Find the temperature of the gas and the rms speed of its molecules
In some tuning systems, the frequency of Eb4 is 308 Hz. Which of the following frequencies will sound good when played simultaneously with 308 HZ? A. 338 hz B. 352 hz C. 140...
Joey weighs 600 N on earth (that is, the force of gravity pulling down on him is 600 N). Some strange and inexplicable things begin happening to the earth. Let the radius of the earth be Re and its...
Joey weighs 600 N on Earth (that is, the force of gravity pulling him down is 600 N). Some strange and inexplicable things begin happening. Let the radius of the earth be Re, and its mass Me (e is...
A space vehicle is traveling at 4220 km/h relative to Earth when the exhausted rocket motor is disengaged and sent backward. The relative speed between the motor and the command module is then 93...
A 4.30 g bullet moving at 717 m/s strikes a 630 g wooden block at rest on a frictionless surface. The bullet emerges, traveling in the same direction with its speed reduced to 472 m/s. (a) What is...