A __________ lens is thicker at the center than the edges
Fill in the blank(s) with correct word
converging
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Metamorphism occurs for which class of rocks?
a. Metamorphic only b. Sedimentary only c. Igneous only d. All of the above
A mass sits at rest on top of a table. Which two forces are interaction pair forces and thus are equal and opposite?
A. the force of gravity on the mass due to the earth and the force of gravity on the earth due to the mass B. the force of gravity on the mass due to the earth and the contact force on the table due to the mass C. the contact force on the mass due to the table and the force of gravity on the earth due to the mass D. the force of gravity on the mass due to the earth and the contact force on the mass due to the table
Waves from a radio station with a wavelength of 644 m arrive at a home receiver a distance 50 km away from the transmitter by two paths. One is a direct-line path and the second by reflection from a mountain directly behind the receiver. What is the minimum distance between the mountain and receiver such that destructive interference occurs at the location of the listener? Assume no phase change
on reflection. a. 161 m b. 322 m c. 483 m d. 644 m e. 1290 m
The resistance of a circuit element is a measure of
A. the total energy of the charges in the circuit element. B. the ratio of the voltage difference between element ends to the current in the element. C. the amount of work that an electron can perform. D. the size of the circuit.