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An object is placed 30 cm from a concave spherical mirror with a radius of curvature of 40 cm. which of the following describes the image?
1) Virtual and located at infinity from the mirror
2) Real and located 60 cm from the mirror
3) Real and located 120 cm from the mirror
4) Virtual and located 60 cm from the mirror
5) Virtual and located 120 cm from the mirror
A girl pulls her brother along on a wagon. She pulls with a force of 35 N in a direction of 29.2 degrees to the horizontal, How much work is done be the girl
A horizontal force of magnitude 41.5 N pushes a block of mass 4.23 kg across a floor where the coefficient of kinetic friction is 0.571. What is the increase in the kinetic energy of the block
A golfer hits a shot to a green that is elevated 3.0 meter above the point where the ball is struck. evaluate the speed of the ball just before it lands
A heater runs on an AC voltage of 120 V and draws a power of 26 W. If this heater were run instead on a DC voltage of 70 V, how much current would flow through the heater? Hint: The heater can be modeled as a resistor.
question a horizontal power line of length 40 m carries a current of 2.7 ka as shown in the figure below. earths
1.00-kohm resistor, a 0.200-H inductor, and a 4.00-microF capacitor are connected in series with an AC generator; the EMF of the generator is given by (150 V)sin((377 rad/s)t). What is the amplitude of the resulting alternating current?
A tiny motor mounted on a toy car operates across two D-cells inseries. If it draws 0.05 A, how much power does it drain from the battery pack
The train's weight is 17 Tons and the desired speed is500km/hr. The test rail track is 20Km long. how much current is necessary to create that magnetic field
If 5.0 moles of air is at 0.0 degrees Celsius and 1.0 atm pressure, what is the volume occupied by the gas in m^3
A 12.9-?F capacitor, a 22.1-k? resistor, a switch, and a 25.0-V battery are connected in series. What is the rate of change of the elecric field between the plates of the capacitor
Two identical resistors are connected in parallel across a 23Vbattery, which supplies them with a total power of 8.7W. While thebattery is still connected, one of the resistors is heated so thatits resistance doubles. The resistance of the other r..
A railroad car of mass 3.3 104 kg moving at 3.50 m/s collides and couples with two coupled railroad cars, How much kinetic energy is lost in the collision
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