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Compute the voltage drop along a 23 length of household no. 14 copper wire (used in 15- circuits). The wire has diameter 1.628 and carries a 12 current.
The emf of a battery is E = 16 V. When the battery delivers a current of 0.5 A to a load, the potential difference between the terminals of the battery is 14 V volts. Find the internal resistance of
Several people are riding in a hot-air balloon. The combined mass of the people and balloon is 281 kg. The balloon is motionless in the air, because the downward-acting weight of the people and ball
Monochromatic light of wavelength 687 nm is incident on two parallel slits. What is the distance y to the ?rst maximum on a screen beyond the slits.
Water flows through a pipe with circular cross section. The fluid has a radius of 5.0 cm and flows at 2.0m/s. The output has a radius of 2.5 cm. Find the output velocity.
A 10 kg monkey climbs up a massless rope that runs over a frictionless tree limb and back down to a 15 kg package on the ground (a) What is the magnitude of the least acceleration the monkey must ha
Which will result in the greatest acceleration?
What is the largest possible distance between speaker B and the observer at C, such that he observes destructive interference?
A vertical scale on a spring balance reads from 0 to 170 rm{N}. The scale has a length of 13.0 rm{cm} from the 0 to 170 rm{N} reading. A fish hanging from the bottom of the spring oscillates vertic
The electricity recieved at an electric substation has a potential difference of 2.80 10^5V. If the requires output is 440V, what should be the ratio of the turns of the step-down transformation?
For a damped oscillator with a mass of 170 g, a spring constant 58 N/m and a damping coefficient of 60 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude at
a plane is flying southwest at 155 mi/h and encounters a wind from the west at 45mi/h? what is the planes new velocity with respect to the ground in standard position?
The length of a simple pendulum is 0.63 m, the pendulum bob has a mass of 295 g, and it is released at an angle of 15° to the vertical. (a) With what frequency does it oscillate? (b) What is th
An airplane flying at 115 m/s due east makes a gradual turn while maintaining its speed and follows a circular path to fly south. The turn takes 15 seconds to complete. What is the radius of the ci
What is the net upward force on an airplane wing of area 15.9 m2 if the speed of flow is 395 m/s across the top of the wing and 272 m/s across the bottom? Assume that both the top and bottom of the w
A piece of wire with mass per unit length 84 g/m runs horizontally at right angles to a horizontal magnetic field. A 6.5A current in the wire results in its being suspended against gravity. What is
For a damped oscillator with a mass of 320 g, a spring constant 82 N/m and a damping coefficient of 71 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude at
A projectile is fired horizontally from a gun that is 44.0 m above flat ground, emerging from the gun with a speed of 370 m/s. (a) How long does the projectile remain in the air? (b) At what horizo
A 0.39 kg iron horseshoe that is initially at 745°C is dropped into a bucket containing 24 kg of water at 46°C. What is the final equilibrium temperature? Neglect any heat transfer to or fr
Monochromatic light of wavelength 687 nm is incident on two parallel slits. What is the distance y to the ?rst maximum on a screen beyond the slits .
A 1400 {rm kg} car drives around a flat 200 {rm m}-diameter circular track at 21 {rm m/s}. What is the magnitude of the net force on the car?
A potter's wheel rotates with an angular frequency of 1.54 rad/s. What is its period?
A railroad freight car weighing 290 kN and traveling at 1.52 m/s overtakes one weighing 206 kN and traveling at 0.920 m/s in the same direction. The cars couple together. What is the speed of the c
An 1150-kg car pulls a 450-kg trailer. The car exerts a horizontal force of 3,800 N against the ground in order to accelerate. What force does the car exert on the trailer? Assume an effective fric
A cube of ice is taken from the freezer at -9.2°C and placed in a 96 g aluminum calorimeter filled with 322 g of water at room temperature of 20°C. The final situation is observed to be all