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You are driving in one direction on a long straight road. You drive in the positive direction at 126 km/h for 30.0 minutes, How far did you drive
You find an unlabeled box of fine needles, and want to determine how thick they are. A standard ruler won't do the job, What is the diameter of the needle
The school bus picks up Brian in front of his house and takes him on a straight-line 3.6 km bus ride to school in the positive direction. what is his displacement on the walk home
A 1460-kg submarine rises straight up towards the surface. Seawater exerts both an upward buoyant force of 16300 N on the submarine, What is the submarine's acceleration
Graphing either versus or versus gives a straight line. In the graph shown above, we chose to plot on the vertical axis, find the magnitude of the crankshaft's angular acceleration
Two metal spheres, each of mass 20 g and initially at rest, are dropped from a height of 10 m in an evacuated chamber. Find the difference in final speeds of the two spheres
Resistivity measurements on the leaves of corn plants are a good way to assess stress and overall health. What is the resistivity of the leaf tissue
A mortar crew is positioned near the top of a steep hill. Enemy forces are charging up the hill and it is necessary for the crew to spring into action. find How long will the mortar shell remain in
When the Sun is directly overhead, a hawk dives toward the ground with a constant velocity of 4.75 m/s at 59.5° below the horizontal, Calculate the speed of her shadow on the level ground
What is the resistance of the wire in the blanket? Express your answer to two significant figures and include the appropriate units. How much current does the wire carry
You're 6.0 m from one wall of a house. You want to toss a ball to your friend who is 6.0 m from the opposite wall. What minimum speed will allow the ball to clear the roof
The discovery of a star orbiting the center of our galaxy with a 15-year period has led to the finding, calculate the semimajor axis of the star's orbit
A gray kangaroo can bound across level ground with each jump carrying it 9.2 from the takeoff point. what is the max height above the ground
A horizontal beam of electrons initially moving at 4.0x10^7 m/s is deflected vertically by the vertical electric feild between oppositely charged parallel plates
A rock thrown with speed 10.5 and launch angle 30.0(above the horizontal) travels a horizontal distance of = 18.0before hitting the ground. Find the height (yi) from which the rock was launched
Two wheels have the same mass and radius of 4.5 kg and 0.39 m, respectively. determine the net external torque that acts on each wheel
An observation satellite orbits the planet at a height of 1000. What is the projectile's speed as it passes the satellite
In order to drop a Pyrex glass marble 1.003 in diameter through the hole in the plate, how much must the temperature of the system be raised
A 52dB sound wave strikes an eardrum whose area is 5.0×10?5m^2. How much energy is received by the eardrum per second
A square loop of wire has sides of length 3 cm. A magnetic field points out of the screen; its magnitude is B = 3.0t2y, What is the emf around the square at t = 2.00 s
What is the electric field strength between the disks? A proton is shot from the negative disk toward the positive disk. What launch speed must the proton have
A helicopter rises vertically with a constant upward acceleration of 0.38 m/s^2. How soon does the wrench hit the ground
Suppose that a particle accelerator is used to move two beams of particles in opposite directions. what is the magnitude of the average current in this region
On vacation, your 1350 kg car pulls a 540 kg trailer away from a stop light with an acceleration of 2.15 m/s2. What force does the trailer exert on the car
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +10q. Sphere B carries a charge of -7q. Sphere C carries no net charge. How much charge ends up on sphere C