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A person is exercising, burning 350 Cal/Hr. While doing this exercise, they breathe deeply, so the volume they take into and out of their lungs is 2 L with each breath. 20% of the air inhaled is ox
If a 2.75 uC charged particle moving in the x-y plane experiences a net force of 4.35 * 10^-3 N in the +x direction, what is the speed and direction of the charged particle? What would the force on
Two cyclists approach and intersection, one from the west and the other form the north, the cyclists from the west has a mass if kg and the one from the north has a mass of 140 kg and is travelling
The component of the external magnetic field along the central axis of a 50-turn coil of radius 4.8 cm decreases from 1.8 T to 0 T in 4.4 s. (a) If the resistance of the coil is 2.8 O , what is the
A charge of -6.4 μC is at the corner of a cube with 0.45 m sides. What is the total flux through the entire surface of the cube?
(a) Find the electric field 10.0 cm from the filament. Distances are measured perpendicular to the length of the filament. (Take radially inward toward the filament as the positive direction.) (b)
What is the magnitude of the acceleration of a proton placed at that point in space?
The athlete is able to rotate the ball at the rate of 8.16 rev/s when the length of the chain is 0.600 m. When he increases the length to 0.900 m, he is able to rotate the ball only 6.35 rev/s.(a)
A dragonfly flies from point A to point B along the path shown in the figure in 2.10s y1 = 1.0, x1 = 2 and y2 = 6, x2 = 10. A) What are the magnitude of its position vector at ?
A rock is thrown upward from the level ground in such a way that the maximum height of its flight is equal to its horizontal range R. (a) At what angle θ is the rock thrown?
A 1500 kg space ship is at a height of 4.30 x 10^7 m above the surface of the Earth traveling at 3600 m/s. a.) Could this space ship be in a circular orbit? Explain.
Three resistors with values 1.0 , 2.1 , and 4.2 are connected in parallel in a circuit with a 7.2 battery. What is the total equivalent resistance?
A certain car traveling 32.0 mph skids to a stop in 35 meters from the point where the brakes were applied. In approximately what distance would the car stop had it been going 89.6 mph?
A baby's mouth is 30 cm from her father's ear and 1.50 m from her mother's ear. What is the difference between the sound intensity levels heard by the father and by the mother?
Why must the electrical field lines leave the surface of a conductor perpendicularly? Explain your answers in terms of electrical potential on and near the conductor plate surface.
A piece of wood is 0.6 m long, 0.250 m wide and 0.080 m thick. The density of wood is 600 kg/m^3. What volume of lead must be fastened underneath it to sink the wood so that its top is just even wit
Following each throw, the ball has a speed of V (m/s )relative to the thrower. After each has made one throw and one catch, (a) How fast are the astronauts moving?
A 1500 kg car moving at 5.4 m/s is initially traveling north in the positive y direction. After completing a 90° right-hand turn to the positive x direction in 4.4 s, the inattentive operator d
The block moves a distance of 1.6 m down the incline, in a time interval of 0.80 s, and acquires a velocity of v2 = 4.0 m/s. The average rate at which friction force does work during the 0.80 s time i
Suppose a beam of monochromatic (single frequency) light, wavelenth 509 nm falls on a double slit whose slits are 0.0917 mm apart. The screen is 68.8 cm from the slits. a) Calculate the distance (in
A galvanometer with a full-scale sensitivity of 550 and a coil resistance of 54 is to be used to build an ammeter designed to read 7.5 at full scale. What is the required shunt resistance?
The electric potential inside a charged spherical conductor of radius R is given by V = keQ/R, and the potential outside is given by V = keQ/r. Using Er = -dV/dr, derive the electric field inside an
When the same emf device is placed across the same two resistors in parallel, the current through the emf device is 51.0 A. What is the magnitude of the larger of the two resistances?
A resistor of unknown resistance and a 50.0-O resistor are connected across a 128.0-V emf device in such a way that an 13.0-A current flows. What is the value of the unknown resistance?
A potential difference of 19.0 V is applied across a wire of cross-sectional area 2.01 mm2 and length 949 km. The current passing through the wire is 3.096×10-4 A. a) What is the resistance of t