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Two girl scouts are sitting in a large canoe on a still lake while at summer camp. The canoe happens to be oriented with the front of the canoe pointing due north. One of the girls is at the front of the canoe and the other is at the back of the canoe. The girl at the front walks to sit next to her friend at the back and sits down. What effect does this event have on the canoe?
1) The canoe will be moving toward the north.
2) The canoe will be moving toward the south.
3) The canoe will still be at rest at its original position.
4) The canoe will still be at rest, but it will be south of its original position.
5) The canoe will still be at rest, but it will be north of its original position.
A fully loaded station wagon has a mass of 1690 kg. If each of its four tires is inflated to a gauge pressure of 211 kPa, what is the total tire area in contact with road . What least distance are they from each other? The angle might be too large ..
In a uniform electric field of magnitude E, the field lines cross through a rectangle of area A at an angle of 79.0° with respect to the plane of the rectangle. What is the magnitude of the flux through the rectangle
A wire 25.1 m long and 6.00 mm in diameter has a resistance of 15.0 m. A potential difference of 27.0 V is applied between the ends. Calculate the resistivity of the wire material
A particle is in uniform circular motion about the origin of an xy coordinate system, moving clockwise with a period of 7.70 s. what is its velocity in unit-vector notation
A 6.3 ?C point charge and a ?1.7 ?C point charge are separated by a distance of 0.00034 m. What is the electric potential energy of this system
A 150g copper bowl contains 220g of water, both at 20 degrees Celsius. A very hot 300g copper cylinder is dropped into the water, causing the water to heat, by 5g being converted to steam. The final temperature of the system is 100 degrees Celsius.
The power rating of a 1000-W heater specifies the power consumed when the heater is connected to an ac voltage of 120 V. Explain why the power consumed by two of these heaters connected in series with a voltage of 120 V is not 2000 W.
A 16 kg rock, m, is on the edge of a 90 m cliff, h, as shown in Figure 11-20. Assume that air resistance is negligible. What speed does the rock have as it strikes the ground
a spherical conducting shell of inner radius r1 and outer radius r2 has a charge q.a a charge q is placed at the centre
The interaction of a typical car’s tires with the road (i.e. the “grip” of the tires) can provide a “lateral” acceleration (i.e. perpendicular to the direction the car is moving) of approximately 0.8 g’s (Some sports cars can get close to 1.0 g).
Close a door by pushing on the doorknob. Close the door again using approximately the same force but applying it 5 centimeters away from the hinges. Try again by applying the force on the edge of the door in a direction pointing toward the hinges. Su..
A mass spectrometer applies a voltage of 2.00 kV to accelerate a singly charged positive ion. A magnetic field of B = 0.400 T then bends the ion into a circular path of radius 0.305 m. What is the mass of the ion?
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