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The raft is traveling down the Mississippi River at a speed of 1.50 m/s relative to the river bank (Figure 3-38). What is Huck's velocity (speed and direction) relative to the river bank?
A square wire loop of size 2a × 2a lies in the xy-plane with the center at the origin and the sides parallel to the x- and y-axes. The wire carries a current I running counterclockwise. Find
The horizontal axis is marked in increments of 6 s.) Find the average acceleration of the motorcycle during each of the segments of motion, A, B, and C.
After a tornado, a 0.60 straw was found embedded 2.7 into the trunk of a tree.If the average force exerted on the straw by the tree was 85 , what was the speed of the straw when it hit the tree?
Downrange on a level course.Neglecting air friction, what minimum projection angle would achieve this result? The acceleration due to gravity is 9.8 m/s^2 . Answer in units of degrees.
An object at rest explodes into three peices of equal mass. One moves east at 20 m/s; a second moves 45 degrees south of east at 30 m/s. What is the velocity of the third piece?
Father racing his son has 1/3 the kinetic energy of the son, who has 1/3 the mass of the father. The father speeds up by 1.0 m/s and then has the same kinetic energy as the son. What are the origin
A stone is thrown at an angle of 30.0 above the horizontal from the top edge of a cliff with an initial velocity of 17 m/s. A stopwatch measures the stone's trajectory time from the top of the cliff
The second crewman, on the opposite side of the lock, pulls at an angle of 45°. With what force F2 should the second crewman pull so that the net force of the two crewmen is in the forward direc
Solve the Friedmann equation to get the scale factor as a function of time. How old is the Universe in this case?
A man pulls the sled a distance 7.83 m along the ground by exerting a constant force of magnitude 236 N on a rope that makes a 27.3o angle above the horizontal. Find: a) the magnitude of the normal
If the plane is headed due north and the deviation from that direction is due to a cross wind blowing from west to east, what is the speed of the wind (in km/h)?
How far (in km) and (b) in what direction (as an angle from due east, where north of east is a positive angle) must it now sail to reach its original destination?
Someone pushes on the end of the spring in a direction perpendicular to the wall until the block does not slip downward. If the spring in such a setup is compressed by 0.0636 m, what is the coeffici
Eight lights are connected in parallel to a 116 V source by two leads of total resistance 1.1 . If 240 mA flows through each bulb, what is the resistance of each? What fraction of the total power i
A wing section of L=1m and width 20m is being tested at STP conditions. The speed of the air passing over the bottom surface is 290m/s while the speed distribution over the top surface can be approx
A plane leaves the airport in Galisto and flies 240 km 68 degrees east of north and then changes direction to fly 154 km at 48 degrees south of east, after which it makes an immediate emergency lan
Determine the average acceleration in m/s^2 , in coordinates with the x-axis in the direction of the original motion and the y-axis toward the side to which the car skids
Light of wavelength 511 nm is incident on a diffraction grating that has 1.67 × 103 lines/cm. What angle θ does the second principal maxima make with respect to the central principal ma
A 66 g bullet traveling at 280 m/s penetrates a block of ice at 0°C and comes to rest within the ice. Assuming that the temperature of the bullet doesn't change appreciably, how much ice is mel
Three strings (labeled A, B and C) attached to the sides of a square box are tied together by a knot as shown. The tension in the sting labeled C is 50 N. Calculate the magnitude of the tension in
A cube of ice is taken from the freezer at -9.4°C and placed in a 97 g aluminum calorimeter filled with 314 g of water at room temperature of 20°C. The final situation is observed to be all
Friend of yours travels by you in his fast sports car at a speed of 0.550 c. It is measured in your frame to be 4.20 m long and 1.10 m high. What will be its length and height at rest?
A robot probe drops a camera off the rim of a 259 m high cliff on Mars, where the free-fall acceleration is 3.7 m/s2. Find the velocity with which it hits the ground.
For the cyclist in this 11.0 s interval, what are the (a) magnitude and (b) direction of the displacement, the (c) magnitude and (d) direction of the average velocity, and the (e) magnitude and (f)