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A circuit contains six 205 ohm lamps with 60-W bulbs and a 9 ohm heater connected in parallel. the voltage across the circuit is 120 V. what is the current in the circuit when four lamps are turned
The largest building in the world by volume is the Boeing 747 plant in Everett, Washington. It measures approximately 627 long, 708 yards wide, and 110 high. What is the volume in cubic feet?
A proton is initially at rest at a point where the potential is 472 V. Some time later the proton is at a point where the potential is 190 V. If no force other than the electrostatic force acts on t
But then construction work forces you to slow to 45 km/h for 40 km. What would be the least speed needed for the rest of the trip to arrive in time for the interview?
A 2200 kg pile driver is used to drive a steel I-beam into the ground. The pile driver falls 5.00 m before coming into contact with the top of the beam, and it drives the beam 16.0 cm farther into
Which set of information will allow you to calculate the kilowatt*hr usage?
An aerosol can of whipped cream is pressurized at 440kPa when it's refrigerated at 3 C. The can warns against temperature in excess of 50 C. What is the maximum safe pressure for the can?
Water (η = 1.00 multiplied by 10-3 Pa·s) is flowing through a horizontal pipe with a volume flow rate of 0.032 m3/s. As the drawing shows, there are two vertical tubes that project from
A spring has a spring constant, k, of 435 N/m. How much must this spring be stretched to store 23 J of potential energy?
Once can set up a two-dimensional scattering theory, which could be applied to puck projectiles sliding on an ice rink and colliding with various target obstacles. The cross section (sigma) would be
If the ball is in contact with the wall for 0.200 s, what is the average force exerted by the wall on the ball? (Assume right is the positive direction.)
A superhero flies 285 m from the top of a tall building at an angle of 15? below the horizontal. What is the horizontal component of the superhero's displacement? Draw the vectors to scale on a grap
Suddenly a child runs into the street. If it takes ann .72 s to react and aply the brakes, how far will she have moved before she begins to slow down?
What is the tension in each of the cables? Use 9.80 for the magnitude of the acceleration due to gravity.
How far below the top surface would the medallion appear if the observer (not wearing goggles) and the block were under water?
The initial speed of the box at the bottom of the incline is 1.10 m/s. How far does the box travel along the incline before coming to rest?
What are three components of attractiveness? Which of the three is most important to you? Why did you choose this factor? Consider, as you respond to your classmates' posts, how their responses hav
The tension in the wires is the same, and they have the same mass. A transverse wave travels on the shorter wire with a speed of 190 m/s. What would be the speed of the wave on the longer wire?
A cable is lifting a construction worker and a crate, as the drawing shows. What is the tension in the cable below the worker?
A thermos contains 130 cm3 of coffee at 85° C. To cool the coffee, you drop two 13-g ice cubes into the thermos. The ice cubes are initially at 0° C and melt completely. What is the final te
A tennis player hits a ball 2.0 above the ground. The ball leaves his racquet with a speed of 21.0 at an angle 5.5 above the horizontal. The horizontal distance to the net is 7.0 , and the net is 1.
Using the data in the drawing, determine the distances D and H, which locate the point where the gun was fired. Assume that the bullet does not slow down as it passes through the window.
a daredevil is shot out of ta cannon at 45 deg, to the horizontal with an initial speed of 25 m/s. a net is positioned a horizontal distance of 50 m. from the cannon. at what hight above the cannon
The origin of a coordinate system is at the center of a wheel which rotates in the xy plane about its axis which is the z axis. A force F = 196 N acts at a +33.0° angle to the x axis, at the po
Determine the work done on the box by each of the four forces that act on the box. Be sure to include the proper plus or minus sign for the work done by each force.