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An 8-cm object is placed in front of a mirror which produces an inverted image that has a height of 16c m. When the object is moved 10 cm closer to the lens, the image is upright with a height of 16cm. What is the focal length of this lens?
A violinist places her finger so that the vibrating section of a 1.20 g/m string has a length of 40.0 cm, then she draws her bow across it. A listener nearby in a 20 ^circ {rm C} room hears a note with the wavelength of 30.0 cm. What is the tensio..
For a science fair competition, a group of high school students build a kicker-machine that can launch a golf ball from the origin with a velocity of 11.3 m/s, How high will be the highest point of trajectory
A pipe carrying 20°C water has a diameter of 2.4 cm. Estimate the maximum flow speed if the flow must be streamline
q1. three resistors are connected in series across a 15-v power supply. if the potential drop across resistors 1 and 2
A plane of a 5.0 cm x 8.0 cm rectangular loop of wire is parallel to a 0.19 -T magnetic field. The loop carries a current of 6.2 A. What is the magnetic moment of the loop
an object that is launched straight up from the ground reaches a maximum height h and falls straight back down to the
How much work must be done to bring threeelectrons from a great distance apart to6.0×10−10m from one another (at the cornersof an equilateral triangle)?
Starting from rest, a 5.5-kg block slides 3.00 m down a rough 30.0° incline, Determine the work done by the friction force between block and incline
Atmospheric pressure is about 1.0 105 Pa on average. What is the downward force of the air on a desktop with surface area 0.1 m2
A single conservative force F(x) acts on a 3.2 kg particle that moves along an x axis. What is the mechanical energy of the system
A circular coil of 180 turns has aradius of 1.30 cm. (a) Calculate the current that results in a magnetic dipole moment of 2.30A·m2.(b) Find the maximum torque that the coil,carrying this current, can experience in a uniform 50.0 mT magnetic field
Water having a density of 1000kg/m^3 is flowing with a velocity of 3 m/s through a pipe. Determine the water velocity at the restriction
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