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A cannon tilted upward at theta = 32{rm ^{circ}} fires a cannonball with a speed of 92 {rm m/s}. At that instant, what is the component of the cannonball's velocity parallel to the ground?
Two meteoroids are heading for earth. Their speed as they cross the moon's orbit are 2.3 km/s. The second meteoroid misses for earth by 2680 km. What is its speed at its closest point?
What is the phase difference between the two waves then they reach the observer? Take the speed of sound as 343 m/s.
A 7.4 g bullet leaves the muzzle of a rifle with a speed of 493.1 m/s. What constant force is exerted on the bullet while it is traveling down the 0.8 m length of the barrel of the rifle?
An angle of 33 from his original direction and running an additional 24 m before being tackled. a) What is the magnitude of the runner's total displacement?
What is the angular acceleration of the flywheel? What is its angular velocity after it makes 4.00 revolutions?How much work is done by the motor during the first 4.00 revolutions?
A 19-g bullet is shot into a 5070-g wooden block standing on a frictionless surface. The block, with the bullet in it, acquires a velocity of 2.0 m/s. Calculate the velocity of the bullet before st
Find the magnitude of the gravitational force that each part exerts on the other out in space, far from any other objects.
It is then pulled down 3.0 and released. The ball makes 17 oscillations in 16 seconds. What is its the mass of the ball?
A computer hard drive disk with a diameter of 3.5 inches rotates at 7200 rpm. The "read head" is positioned exactly halfway from the axis of rotation to the outer edge of the disk. What is the tang
A whirling device is launched spinning counterclockwise at 35 rad/s. It slows down with a constant angular acceleration and stops after 16 seconds. If the radius of the device is 0.038 m, what is t
Determine the temperature at which an alcohol thermometer with Fahrenheit scale will read the same number as a thermometer with a Celsius scale.
You're carrying a 3.6m long, 25kg pole to a construction site when you decide to stop for rest. You place one end of the pole on a fence post and hold the other end of the pole 35cm from its tip. H
A mass-spring system oscillates on a horizontal frictionless surface with an amplitude of 3.88 cm. If the spring constant is 220 N/m and the mass is 0.430 kg, how do you determine the mechanical en
Enjoy a last meal of worm, and then go to heaven. The gravity in heaven is 2.718 m/s², and you are no longer under water, so how much do you now weigh, in N.
An ocean liner leaves New York City and travels 37.0° north of east for 189 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship
Assume that it takes 2.30 kg of oxygen to burn 1.00 kg of coal. (The actual amount varies with the type of the coal). What is the total mass of the reagents used in the combustion during the 30 days
It can transport people at the rated capacity between the first and fifth floors, with a vertical distance of 15 ft between each floor in 7 seconds. Estimate the power for such an elevator.
A slingshot consists of a light leather cup attached between two rubber bands. It takes a force of 28 N to stretch the bands 1.1 cm. a) What is the equivalent spring constant of the rubber bands?
A 23 kg chair initially at rest on a horizontal floor requires a 364 N horizontal force to set it in motion. Once the chair is in motion, a 328 N horizontal force keeps it moving at a constant veloc
What minimum thickness should the magnesium fluoride film have if the reflection of 667 nm light is to be suppressed? Assume that the light is incident at right angles to the film.
Explain how Einstein's contribution to understanding the force between the earth and the moon differed from Newton's. Include a brief statement of Einstein's explanation in your answer.
The fourth-order bright fringe is 51 mm from the central fringe on a screen 1.7 m away. What is the separation of the two slits in in millimeters?
A 1025 kg car carrying four 78 kg people travels over a rough "washboard" dirt road with corrugations 4.0 m apart which causes the car to bounce on its spring suspension. The car bounces with maxim
If the slits have a separation d = 0.0270 mm, what is the minimum distance from the slits to the screen when 580 nm light is used? in cm