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A typical person radiates about 62 W of power at room temperature. How long does is take for a person to radiate away the energy acquired by consuming a 230 Calorie doughnut?
A 18.6g of Styrofoam carries a net charge of -0.686 uC and floats above the center of a large horizontal sheet of plastic that has a uniform charge density on its surface. What is the charge per un
A race car has a mass of 703 kg. It starts from rest and travels 40.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it?
When an external resistor of resistance R1 = 16 Ω is connected to the terminals of a battery. Calculate: the internal resistance of the battery.
A small steel ball bearing with a mass of 23.0 g is on a short compressed spring. When aimed vertically and suddenly released, the spring sends the bearing to a height of 1.43 m. Calculate the horiz
A 0.25 kg skeet (clay target) is fired at an angle of 28 degrees to the horizon with a speed of 25 m/s. When it reaches the maximum height, h, it is hit from below by a 15m g pellet traveling vertic
A 30.0 mu F capacitor initially charged to 30.0 mu C is discharged through a 2.10 kOmega resistor. How long does it take to reduce the capacitor's charge to 6.00 mu C?
A particle starts from the origin at = 0 with an initial velocity of 5.5 along the positive axis.If the acceleration is (-2.8 + 4.5 ), determine (a)the velocity and (b)position of the particle at t
A cargo plane is flying horizontally at an altitude of 11.4 km with a speed of 960 km/h when a large crate falls out of the rear loading ramp. (Ignore any effects due to air resistance.)
A 1210-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A 1960-N crate hangs from the far end of the beam. Using the data shown in the figure, f
A small ferry boat is 4.00 m wide and 6.00 m long. When a loaded truck pulls onto it, the boat sinks an additional 4.80 cm into the water. What is the weight of the truck?
A piece of rock weighs 308 N in air and has an apparent weight of 196 N when suspended in water. What is the volume of the rock?
A 5-gram bullet is fired from a 1 kg gun. When the gun is fired it kicks back (recoils) with an acceleration of 4.6 m/s2. What is the acceleration of the bullet as it travels down the barrel of the
A 3.40 kg steel ball strikes a wall with a speed of 7.0 m/s at an angle of 60.0° with the surface. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.20
A hockey puck (mass) 4 kg and a velocity 4 m/s going east (positive) collides head on with a hockey player (mass 86 kg) with a velocity of 8 m/s going west.
When released what will be the kinetic energy of the e1-c charge of the previous problem if it flies past its starting position?
A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. The thrust of its engines is 2.00 *10^5 N. In being launched from rest it moves thro
Calculate the location of the final image after passing through both lenses using the thin lens equation.
Iron has a density of 7.87 g/cm3. What mass of iron would be required to cover a football playing surface of 120 yds × 60 yds to a depth of 1.0 mm? (1 inch = 2.54 cm; 1 lb = 453.6 g)
If the magnitude of the electronic force streching the building is 4.48*10 -4 N, how tall is the International Finance Center?
Each plate of a parallel-plate air capacitor has an area of 0.0080 m2, and the separation of the plates is 0.090 mm. An electric field of 4.2 x 106 V/m is present between the plates. The surface cha
A straight wire 6.0 m long carries 30 microC} distributed uniformly over its length. Find the electric field strength 11 cm from the wire axis, not near either end. Find the electric field strength
To the nearest micron (millionth of a meter), what is the change in length of the rod produced by the student's weight?
The 0.2 puck on the frictionless horizontal table is connected by a string through a hole in the table to a hanging 1.20 kg block. With what speed must the puck rotate in a circle of radius 0.5 m if
A spaceman of mass 80 kg is sitting in a spacecraft near the surface of the Earth. The spacecraft is accelerating upward at five times the acceleration due to gravity. What is the force of the spac