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A move theater projector produces a 3.0 m wide image of a 2.5 cm wide picture on a screen that is 18 m distant. The focal length of the projection lens must be about?
A hoop and a disk, both of 0.46- m radius and 3.0- kg mass, are released from the top of an inclined plane 3.0 m high and 9.0 m long. What is the speed of the disk
A RC circuit consists of 20 M-Ohm and C = 2 milli-farad. It started charging sometime ago with a 12-volt battery. Today, 10 am, you measure the voltage across the capacitor and it reads 8 V. When was the start time?
The position of an object connected to a spring varies with time according to the expression x = (4.4 cm) sin(6.9?t). (a) Find the period of this motion.
One kilogram of dry air at STP conditions is exposed to 1.00 R of X-rays. One roentgen is defined by Equation 32.1 in Section 32.1. An equivalent definition can be based on the fact that an exposure of one roentgen deposits 8.30 x 10-3 J of energy..
A lantern with a 6v, 0.5w bulb uses a battery with emf 6v andinternal resistance 2 ohms. How much power is actually delivered to the bulb?
A future geosynchronous space station will be used to collect solar energy. The energy is transmitted back to earth as an electromagnetic beam. how large are the station's solar panels
A solid disk is rotating about an axis with uniform angular velocity. another disk, with the same moment of intertia about the rotation axis, how is the new angular velocity related to the old one
Find out the object position p for the image to be erect and 7 times the size of the object. Focal length is 46 cm.
Capacitors C1 = 5.0 µF and C2 = 2.0 µF are charged as a parallel combination across a 250 V battery. Calculate the resulting charge on each capacitor
Europa, a moon of jupiter, has an orbital radius of 6.70 x10^8 m, and a period of 3.55 days. What is the mass of Jupiter
A 2.67 ? resistor, a 5.52 ? resistor, and a 8.10 ? resistor are connected in series with a 24.0 V battery. What is the equivalent resistance? What is the current in each resistor?
An ion harvester is scouring deep space for isolated xenon (Xe+) ions. A xenon ion is singly ionized and has the charge of +e. If the field meter reads 0.000000202 N/C, how far away is it from the ion.
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