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A 50-N force is the only force a 2-kg crate that starts from rest. At the instant the object has gone 2m the rate at which the force is doing work is: (answer is in Watts)
A diffraction grating with 305 lines/mm is 1.00 m in front of a screen. What is the wavelength of light whose first-order maxima will be 15.4 cm from the central maximum on the screen?
You are on a mysterious planet and notice that a 4.8 m long simple pendulum has a period of 2.6 s. Determine the planet's acceleration due to gravity.
The wooden box is sitting on a spring scale which fully supports it. What is the reading of the spring scale while the pellet is freely falling inside the box?
A solid sphere (M=2.0 kg and R=0.5 m) is rolling without slipping on a horizontal surface at speed vcm=4.3 m/s. What is the total kinetic energy of the sphere at the bottom of the incline?
A particular ideal solenoid has 1200 turns/m, a radius of 10 cm, and a current of 4.0 A. An electron is fired from the axis of the solenoid in a direction perpendicular to the axis. What is the maxi
Place a test lead in one of the big lab magnets and plug both ends in the voltmeter so that it measures voltage on the 200m scale, the millivolt scale. Then the lead will be pulled out. Explain wha
To protect their young in the nest, peregrine falcons will fly into birds of prey (such as ravens) at high speed. Assume that a 600g falcon flying at 20.0 m/s hit a 1.50 kg falcon flying at 9.0 m/s.
Question: From the top of a lighthouse 136 ft above the surface of the water, the angle of depression of a boat is observed to be 29.7 degrees. Find the horizontal distance from the boat to the ligh
When the object is completely submerged in ethyl alcohol, its apparent weight is 15.0 N. When completely submerged in water, its apparent weight is 14.0 N. What is the volume of the object?
I am driving down the interstate at a brisk rate of 53 miles per hour. What should the radius of my tires be so the tires would have an angular velocity of 100 revolutions per minute?
During Takeoff an airplanes angle of ascent is 18 degrees and its speed is 275 feet per second. Find the planes altitude after 1 minute and how long it will take the plane to ascend to 10,000 feet.
Explain the significance of RH in a hall sensor and, using the hall sensor, how would you prove that the charges that move in the conductor are actually electrons?
The center of mass of the pendulum rises a vertical distance of 16 cm. Assuming that the bullet remains embedded in the pendulum, calculate the bullet's initial speed?
Question: On a sunny day, a building and its shadow form the sides of a right triangle. If the hypotenuse is 31 m long and the shadow is 20 m, how tall is the building? (Round to the nearest tenth.)
A spacecraft in an orbit about Earth has speed 10000 m/s at a perigee of 7010 km from Earth's center. What is the speed of the spacecraft at apogee of 40100 km?
Angle CBA and angle CBD are right triangles with angle C=90 degrees and they share side CB. Segment AD=34.240 feet, angle A=31.625 degrees and angle D=37.247 degrees. What are the lengths of segment
Question: Use inverse trigonometric functions to find a solution to the equation cos(x)=0.6 in the interval 0 leq x leq 4pi. Then, use a graph to to find all other solutions to this equation on this
The distance from the center of the central maximum to the first-order maximum is 3.60 mm. Calculate the slit width.
The pipe radius is 2.80 cm. At the higher point located at y = 2.50 m, the pressure is 1.24 * 10^5 Pa and the pipe radius is 1.60 cm. Find the speed of flow in the lower section.
According to Dr. Einstein, the speed of light is 186,000 miles per second. How far will a radio wave exhibiting the voltage characteristics of a sine wave move through deep space(to the nearest whol
If the transmission axis of the analyzer makes an angle of 40° with the axis of the polarizer, what is the intensity of the transmitted light?
Consider the function y = cos(x-30). At what degree on the x axis in the first period (0 - 360 degrees) will the function exhibit its negative peak amplitude?
How many seconds after launch does the projectile attain maximum height?
A man walks 5 miles in a direction 30 degrees north of east. He then walks a distance x miles due east. He turns around to look back at his starting point, which is at an angle of 10 degrees south o