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With respect to bar and 47 ? with respect to wall. What is the magnitude of the horizontal force Hx on the pivot? The acceleration of gravity is 9.8 m/s2 .
A 75 kg hiker has fallen down a hole. One rescuer attaches a rope to the injured hiker and then a second rescuer pulls the injured hiker straight up out of the hole at a steady rate. How much force
A sailboat is running along a straight course with the wind providing a constant force of 50 lb. The only other force acting on the boat is resistance as the boat moves through the water. The resis
The field goes down to 1.4×10^3 V/m (the charges on the plates of the capacitor stay the same). What is the dielectric constant of the unlabeled paste?
An old question is "Which weighs more, a pound of feathers or apound of lead?' If the weight in pounds is the gravitational force, will a pound of feathers balance a pound of lead on opposite pans
Use the evolution of the atomic model from Democritus to DeBroglie to illustrate that scientific thought is adjusted through time and is not just a collection of facts. Your explanation should cont
if 25grams of water at 100 degrees Celsius are mixed with with 15 grams of water at 40 degrees Celsius,what temperature will the 40grams of combined water be at once they reach equilibrium?
A cylinderical water tank of radius 10ft and height 30ft is half filled with water. how much work is required to pump all of the water out through a hole in the top of the tank?
Two people are carrying a uniform wooden board that is 3.00 m longand weighs 160 N. If one person applies an upward force equalto 60 N at one end, at what point does the other person lift?
The acceleration of gravity is 9.8 m/s2 . Find the speed of the block after it has moved 3.35 m.
A transverse wave on a cord is given by y(x, t) = 0.12 sin(3.0 x - 15.0 t). At t = 0.20 s, what are the displacement and velocity of the point on the cord where x = 0.60 m?
What is the magnitude of the acceleration of one of the liners toward the other due to their mutual gravitational attraction?
A space station, in the form of a wheel 128 m in diameter. Find the rate of the wheel's rotation in revolutions per minute that will produce this effect.
A 12.0 m long conveyor belt, inclined at 30.0°, is used to transport bundles of newspapers from the mailroom up to the cargo bay to be loaded on to delivery trucks. Each newspaper has a mass of
Neglecting air resistance (on Earth) and variations in the acceleration of gravity with height, how long does it take the projectile on the Moon to reach its maximum height?
A 0.26-{rm kg} rock is thrown vertically upward from the top of a cliff that is 31 {rm m} high. When it hits the ground at the base of the cliff, the rock has a speed of 31 {rm m/s}. Assuming that a
A single loop of wire with an area of 0.0900 m2 is in a uniform magnetic field that has an initial value of 3.80 T,If the loop has a resistance of 0.600 Ω, find the current induced in the loop.
An airplane flies at airspeed (relative to the air) of 170 km/h. The pilot wishes to fly due North (relative to the ground) but there is a 77 km/h wind blowing Southwest (direction 225 clockwise f
A circuit two resistors ( 10 and 20 ) and two capacitors (12mF and 6mF) connected to a 6 V battery, as shown in the diagram above. The circuit has been connected for a long time. Calculate the total
A second fragment, whose mass is 3.5 , moves away from the point of explosion with a speed of 485 along the negative x axis. What is the speed of the third fragment? Ignore effects due to gravity.
A 58.0 kg person jumps from rest off a 9.0 m high tower straight down into the water. Neglect air resistance during the descent. She comes to rest 3.00 m under the surface of the water. Determine t
Diffraction also occurs with sound waves. Consider 1400 Hz sound waves diffracted by a door that is 65 cm wide. What is the angle between the two first-order diffraction minima?
The temperature of the glass surface of a 60 W lightbulb is 67^circ C when the room temperature is 17^circ C. Estimate the temperature of a 160 W lightbulb with a glass bulb the same size. Consider
If the electron just misses the upper plate as it emerges from the field, find the speed of the electron as it emerges from the field?
Two clocks are taken from the Earth to the Moon. The first clock uses a pendulum mechanism, while the second uses a spring-loaded mechanism. What happens with the time displayed by the pendulum clo