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Then walks 380 in a direction 28 east of north. Find the direction of the displacement that will return Bob to his starting point by the most direct route.
What is the average velocity for Larry's entire run?
A 57.4 person running tangential to the rim of the merry-go-round at 3.11 jumps onto its rim and holds on. Before jumping on the merry-go-round, the person was moving in the same direction as the m
A space traveler whose mass is 115kg leaves earth. What are his weight and mass on earth and in interplanetary space where there are no nearby planetary objects?
What is the pendulum bob's speed when it passes through the lowest point of the swing?
The rate for electrical energy is $0.120/kWh. If the heating bill for January is $200, how long must the furnace have been running on an average January day?
A major-league pitcher can throw a baseball in excess of 43.3 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches a catcher who is 17.1 m away from the
What is the speed of the ball at time t = 0.96 s? Write your answer using SI units to 3 significant figures. In this space, do not include units.
A parallel-plate capacitor has 1.89 cm2 plates that are separated by 5.56 mm with air between them. If a 12.0 V battery is connected to this capacitor, how much energy does it store?
The line joining the two charges the potential is zero. (Assume the potential is zero very far from all charges.) What is the ration q/q'?
As part of a safety investigation, two 1200 {rm kg} cars traveling at 24 {rm m/s} are crashed into different barriers. Find the average forces exerted on (a) the car that hits a line of water barre
Consider two dimensional simple triangular lattice for free electron metal with two electrons per atom. Assuming the lattice constant is a, find the areas the electron and hole pockets that are for
A box of Cheerios (mass mC = 0.9 kg) and a box of Wheaties (mass mW = 2.7 kg) are accelerated across a horizontal surface by a horizontal force applied to the Cheerios box. The magnitude of the fri
A sample of 0.28 mol of methane occupies 12.7L at 21°C. Calculate the work done when the gas expands isothermally against a constant external pressure of 27 kPa until its volume has increased b
The hammer rebounds with speed 11.0 m/s after 0.110 s. What is the average strain in the spike during the impact?
When a droplet of oil spreads out on a smooth water surface, the resulting "oil slick" is approximately one molecule thick. An oil droplet of mass 9.00 × 10-7 kg and density 918 kg/m3 spreads
A 5.2 g pop up toy is compressed 1.5 cm and pops up to a height of 50 cm the spring constant is 240 Nm. What is the loss of energy?
A 58-g ice cube at 0°C is heated until 51 g has become water at 100°C and 7.0 g has become steam at 100°C. How much energy was added to accomplish the transformation?
Find the magnitude of the gravitational force a 67.9 kg person would experience while standing on the surface of Earth with a mass of 5.98 × 10^24 kg and a radius of 6.37 × 10^6 m. The
The rms speed of the molecules in 1.7 g of hydrogen gas is 1600 m/s. A) what is the total translational kinetic energy of the gas molecules?
Determine the maximum wavelength of the photon that hydrogen in the excited state ni = 6 can absorb. The energy of the ground state of hydrogen is -13.6 eV.
Path A is 7.0 km long heading 60.0 degrees north of east.Path B is 6.0 km long in a direction due east. Path C is 5.0 km long heading 315 degrees counterclockwise from east. Graphically add the hike
With the power supply disconnected, the dielectric material is removed and the potential difference between the plates is measured to be 400 V. What is the dielectric constant of the material that w
what is the phase angle in a series RLC circuit with L=50mH, R=20 ohms, C=100 microfarads? the rms applies voltage is 120 V and 60Hz.
The electric potential at the center of a square is 5 V when a charge of +Q is located at one of the square's corners. What is the electric potential at the square's center when identical charges o