Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
A flowerpot is accidently knocked off the edge of a balcony 50 m above the ground. Find the velocity and acceleration of the flowerpot at t=2.0s
Air conditioners are rated by their coefficient of performance at 60F inside temperature and 96F outside temperature. What is the maximum possible coefficient of performance
Here in Boulder, normal atmospheric pressure is NOT 1 atm (that's down at sea level) Let's call it 0.850 atm on a given day. what is the amplitude of the pressure wave
A 1,200 kg car going 25 m/s is brought to stop using its brakes. Let's assume that a total of approximately 20 kg of iron in the brakes, What was the car's original kinetic energy
Two steel juggling balls each carry a charge of 2.75 ?C. determine the distance between the centers of the two balls
A thin spherical shell of mass 4.00 kg and diameter 0.200 m is filled with helium (density ? = 0.180 kg/m3). How long will it take for the top of the shell to reach the water surface
A Styrofoam slab has thickness h and density ?s . When a swimmer of mass m is resting on it, Find the area of the slab
A box-shaped piece of concrete measures 3ft by 2ft by 0.5ft. Find the buoyancy force that acts on it when it is submerged in water
A blimp used for aerial camera views of sporting events holds 200,000 ft3 of helium. How much does the helium weigh
A 2.0{\rm mm} -diameter ball bearing has 3.0×109 excess electrons. What is the ball bearing's potential
When point charges q1 = +6.8 ?C and q2 = +5.3 ?C are brought near each other, Determine the distance between the charges
A student records the temperature of the gas is as he increases the pressure inside the container and plots the data in the graph shown below, How many moles of gas are inside the container
A bar with cross-sectional area A = 0.5cm2 is used to conduct heat between two regions at different temperature. The bar is made of silver, k = 417 W/(m·K). Find the length of the silver bar
A person runs up a long flight of stairs in 10 seconds. If the person's weight is 600 N, determine the person's power output
A ruler of mass m = 75g and L=3.0meters is placed so that it is exactly balanced across two spinning cylinders a distance d = 1.0meters apart. What is the frequency of oscillation in the ruler
An elevator can lift a 185 N aircraft a distance of 36 meters in 11 s. What is the power output of the elevator
A soldier has a huge contraption that notches a large 2 kg arrow (it looks more like a lance) in a massive bow and uses a winch system to draw the arrow back to set the bow. What is the speed of the
rail car that weighs 43 N is accelerated at 8.9 m/s/s for 4.5 seconds. How much work is done on the rail car
A solenoid is constructed having 350 turns of wire and is 62.0 cm in length. A single hanging wire is positioned vertically at the end of the solenoid, what is the magnitude of the force on the wire
In a movie, a person is supposed to jump with a motorcycle from the roof of one skyscraper to another one. what minimum initial speed would she need to make the jump
Two 3.50g beads (point charges) are hanging on threads and repel each other after being equally charged. What is the charge on each bead
a piano note is compared to a tuning fork vibrating at 440 Hz. Four beats per second are discerned by the piano tuner. What was the initial frequency of the piano wire
Your friend's car is parked on a cliff overlooking the ocean on an incline that makes an angle of 24.7° below the horizontal. determine the car's position relative to the base of the cliff
Your roommate is working on his bicycle and has the bike upside down. He spins the 70.0cm -diameter wheel, What is the pebble's acceleration
An air conditioner operating between 97F and 72F is rated at 3900 Btu/h cooling capacity. What horsepower is required of the air conditioner motor