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A boxcar of mass 600 tons at rest becomes uncoupled on a 5.00 grade. If the track is considered to be frictionless, what speed does the boxcar have after 15 seconds?
A 12.0 g bullet is fired horizontally into a 101 g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring of constant 151 N/m. The bullet becomes embe
3.50×1023 nitrogen molecules collide with a 15.0 wall each second. Assume that the molecules all travel with a speed of 410 and strike the wall head on. What is the pressure on the wall?
A third force is applied and balances to zero the effects of the other two. What are the nagnitudes and direction of this third force? Specify the direction relative to the negative x axis.
How far does the cab move while accelerating to full speed from rest? How long does it take to make the nonstop 198 m run, starting and ending at rest?
An echo is heard in 3 sec after the emission of sound. If speed of sound in air is 342 m/s, what is the distance of the reflecting surface from the source?
A constant torque of 25.0 N·m is applied to a grindstone whose moment of inertia is 0.130 kg·m2. Using energy principles, and neglecting friction, find the angular speed after the gri
A 1 m rod of pure copper 1 cm2 in cross section connects a 200 oC thermal reservoir with a 0 oC thermal reservoir. The system has already reached steady state. What is the rate of change entropy of
A 10.0 g bullet is fired horizontally into a 100 g wooden block that is initially at rest on a frictionless horizontal surface and connected to a spring of constant 158 N/m. The bullet becomes embed
What then are (c) the magnitude and (d) direction of the resultant force - applied to the crate? In both cases express the direction as a positive angle relative to due west.
A jetliner touches down at 220 km/hr, reverses its engines to provide braking, and comes to a halt 29 s later. What is the shortest runway on which this aircraft can land, assuming constant decelera
What is the magnitude of the net gravitational force on the mass at the origin due to the other two masses? Take the gravitational constant to be = 6.67×10-11
The electric field amplitude is reduced to one fifth of its original value). What is the complex index of refraction of the medium at this frequency?
A jetliner touches down at 225 km/hr, reverses its engines to provide braking, and comes to a halt 19.5 s later. What is the shortest runway on which this aircraft can land, assuming constant decele
A shopper pushes a cart 44 m south down one aisle and then turns 90.0° west and moves 30 m. He then makes another 90.0° turn and moves 13 m. (a) What is the largest possible displacement of
Compute the average acceleration (magnitude and direction) of the plane during landing (take the positive direction to be northward).
A cannon tilted upward at angle = 35 fires a cannonball with a speed of 90 m/s. At that instant, what is the component of the cannonball's velocity parallel to the ground?
Tarzan (m = 87 kg) tries to cross a river by swinging from a 10.0 m long vine. His speed at the bottom of the swing, just as he clears the water, is 9.0 m/s. Tarzan doesn't know that the vine has a
what is the average volume (in cubic meters) required for each iron atom and what is the distance (in meters) between the centers of adjacent atoms?
Light of wavelength 575 nanometers falls perpendicularly on a double-slit and the third order bright fringe is seen at an angle of 6.5 degrees. What is the separation between the double slits?
A wheel of radius 0.80 m rotates at a uniform angular speed. If a point on the rim experiences a centripetal acceleration of 1.6 m/s2, what is the rim's tangential speed?
In 85 centuries, what is the total (in hours) of the daily increases in time (that is, the sum of the gain on the first day, the gain on the second day, etc.)?
A car drives straight off the edge of a cliff that is 60 m high. The police at the scene of the accident observed that the point of impact is 134 m from the base of the cliff. How fast was the car
What is the minimum angle between the vector of the electron spin an arbitrary direction in 3D space?
What is the magnitude of the centripetal acceleration of the stone while in circular motion?