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Notice a jogger approaching. If thejogger is running at a speed of 2.50m/s, how fast is her image moving when she is 10m away?
Solar radiation enters a narrow, rectangular, east-west canyon at noon. The valley is 100m wide and the sides of the canyon are 100m tall.
An air-filled toroidal solenoid has a mean radius of 20.0 and a cross-sectional area of 7.00 . When the current is 11.0 , the energy stored is 0.450. How many turns does the winding have?
You hold a brick at rest in your hand. (a) How many forces act on the brick? (b) Identify these forces. (c) Are these forces equal in magnitude and opposite in direction? (d) Are these forces an ac
What is the probability that technician B in an independent 5 minute measurement would obtain a value as close, or closer, to the true count rate as technician A.
You want to throw a 0.145 kg baseball with a speed of of 144 km/hr. To achieve that, you swing your hand so that the displacement of the ball is 2.20 m and release it. Assuming that the force durin
A 31 kg child slides down along an inclined slide that makes an angle 35o with the horizontal. If the length of the slide is 15 m and the speed of the child is 5.5 m/s at the bottom of the slide, w
A 30.00 kg kid crawls up a 12.00 meters long slide inclined at an angle of 30.00 degrees above the horizontal. What is the change in gravitational potential energy of the child
A shop sign weighing 255 N is supported by a uniform 125 N beam as shown in Fig. 9-54. Find the tension in the guy wire. Find the horizontal and vertical forces exerted by the hinge on the beam.
A string tied to a sled makes an angle of 60° to the vertical when you are pulling it on an icy frictionless horizontal surface. If the tension in the string is 40.0 N, calculate the work done
If the Earth's magnetic field has magnitude 0.44 m T and is directed 65 degrees below the horizontal, what is the magnetic flux through the desk surface?
An AC generator has 95 rectangular loops on its armature. Each loop is 11 cm long and 8 cm wide. The armature rotates at 1100 rpm about an axis parallel to the long side. If the loop rotates in a u
A grinding wheel is a uniform cylinder with a radius of 7.70cm and a mass of 0.500kg. Calculate its moment of inertia about its center.
A cylindrical cable with 2.53 x 10-8 m resistivity carries a current of 1300 A. There is a potential difference of 1.9 x 10-2 V between two points on the cable that are 0.24 m apart. What is the ra
An electric power station is producing 1.6 x 10^+3 W of power that is to be sent to a small town located 12 km away. Each of the two wires that comprise the transmission line has a resistance per k
Reaction times were graphed and increased as the letters were rotated away from 0 mdegrees. Interestingly, reaction time decreased after 180 degrees. Explain why this might occur?
The vertical component of the Earth's magnetic field at this location has a magnitude of 44.0 µT. What is the magnitude of the induced emf between the ends of the beam?
How long would the source have to be counted in order for the standard deviation of the activity (0.933 Bq) to be 1% of its mean.
Perform this test and report a two tailed p-value also provide a 95% Cl for the mean difference in HgbA1c before minus the mean HgbA1c after use of the insulin pump.
A 89-kg lumberjack stands at one end of a 385-kg floating log, as shown in the figure. Both the log and the lumberjack are at rest initially. If the lumberjack now trots toward the other end of the
The first player has an acceleration whose magnitude is 0.50 m/s2. The second player's acceleration has a magnitude of 0.40 m/s2. How much time passes before they collide?
Derive an expression realting coefficient of static friction to Fs(max) and N where Fs is the force needed to just move the load (hanging mass *g) n is the weight of the block and additional load (
A speed boat is slowing at a constant rate as it moves toward port. It enters a canal that is 5.1 km long. How fast was the ship moving when it entered the canal.
A 220 , 43.0-cm-diameter turntable rotates on frictionless bearings at 62.0 . A 25.0 block sits at the center of the turntable. A compressed spring shoots the block radically outward along a fricti
A caterpillar climbs up a one-meter wall. For every 2 cm it climbs up, it slides down 1 cm. It takes 10 minutes for the caterpillar to climb to the top. Calculate the speed at which the caterpillar