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A 57.0- resistor is connected in parallel with a 123.0- resistor. This parallel group is connected in series with a 24.0- resistor. The total combination is connected across a 15.0-V battery. Find
A Ferris wheel with a radius of 8.0 m rotates at a constant rate, completing one revolution in 30.0 s. What is the apparent weight of a 60.0-kg passenger when she is at the top of the wheel?
A shipwreck survivor is lying on a raft in the middle of the ocean. The survivor trying to pass the time counts 15 crests that pass the raft in 45 seconds. From crest to the trough of the same wave,
A baseball (0.15 kg) and an electron both have a speed of 42 m/s. Find the uncertainty in position of the baseball, given that the uncertainty in their speed is 7.0%.
0.50 kg mass hangs from a string which is attached to a 1 kg box. The coefficient of friction between the box and the table top is 0.12. When the hanging mass is allowed to fall freely, the system a
Twelve equal charges, q, are situated at the corners of a regular 12-sided polygon (for instance, one on each numeral of a clock face). What is the net force on a test charge Q at the center? Suppo
You and a friend each drive 50.0 km. You travel at 89.0 km/h; your friend travels at 92.0 km/h. How long will your friend wait for you at the end of the trip?
How does your answer compare with the time it takes the sun to disappear, once its lower edge meets the horizon at sunset?
The scale of a spring balance reading from 0 to 250{N} has a length of 11.0{cm}. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.80{Hz}. What is the mass of th
Consider two thin concentric conducting spherical shells (the outer shell and the inner shell) with radius a and b, respectively. We deposit charge q on the outer shell and -2 q on the inner shell.
The falls are approximately 108 m high. If the river is flowing horizontally at 3.60 m/s just before going over the falls, what is the speed of the water when it hits the bottom? Assume the water is
A river flows toward the east. Because of your knowledge of physics, you head your boat 44° west of north and have a velocity of 8.0 m/s due north relative to the shore. (a) What is the velocity
An air-traffic controller observes two aircraft on his radar screen. The first is at altitude 900 m, horizontal distance 19.9 km, and 25.0° south of west. The second aircraft is at altitude 1300
Calculate the linear speed due to the Earth's rotation for a person at a location of 40 degrees N latitude of the Earth. The radius of the rotation at this location is 5.00x10^6m.
An electric field of 2.60 × 105 V/m is desired between two parallel plates each of area 23.0 cm2 and separated by 0.250 cm of air. What charge must be on each plate?
A 15 g rifle bullet traveling 250 m/s buries itself in a 3.0 kg pendulum hanging on a 2.9 m long string, which makes the pendulum swing upward in an arc. Determine the horizontal component of the p
A plane leaves the airport in Galisto and flies 135 km 68 degrees east of north and then changes direction to fly 219 km at 48 degrees south of east, after which it makes an immediate emergency land
What is the unstretched length of the spring? What would be the length of the spring if an additional 0.8 kg was added?
A loudspeaker of mass 24.0 {rm kg} is suspended a distance of h = 1.20 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.10 {rm m}.
A wire carries a current of 6.0 A in a direction that makes an angle of 24.0° with the direction of a magnetic field of strength 0.100 T. Find the magnetic force on a 4.00 m length of the wire.
A 48 kg skier skis directly down a frictionless slope angled at 5° to the horizontal. Assume the skier moves in the negative direction of an x axis along the slope. A wind force with component F
You and your friends push horizontally with a force F. Once the crate has started to move, how large must F be in order to keep the crate moving at a constant speed?
A hot iron horseshoe (mass=0.40 kg), just forged is dropped into 1.60 L of water in a 0.30-kg iron pot initially at 20 degree celsius. If the final equilibrium temperature is 25.0 degree cesius, es
Your expression should give 3.0 m/s for and your answer to part A for theta. Express your answer in terms of theta. Make a graph of v versus theta for one complete revolution.
In a 25.0 set, the ghost is about 1.00 to the right of the principal image if the reflected signal arrives 0.800 after the principal signal.In this case, what is the difference in the distance trave