A ball thrown horizontally from a point 24 m above the ground, strikes the ground after traveling horizontally a distance of 18 m. With what speed was it thrown, assuming negligible air resistance?
A) 6.1 m/s
B) 7.4 m/s
C) 8.1 m/s
D) 8.9 m/s
C
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Intensity: A radio transmitter is operating at an average power of 4.00 kW and is radiating uniformly in all directions. What is the average intensity of the signal 8.00 km from the transmitter?
A. 4.97 ?W/m2 B. 2.49 ?W/m2 C. 0.00497 W/m2 D. 0.00249 W/m2
Consider a system consisting of two Einstein solids P and Q in thermal contact. Assume that we know the number of atoms in each solid and ?. What do we know about the system if we also know the quantum state of each atom in each solid?
A. Its macrostate B. Its microstate C. Its macropartition D. Its microstate and macropartition E. Its macrostate and macropartition F. Its macrostate and microstate T. Its macrostate, microstate, and macropartition
A piece of iron heated to 200 degrees Celsius has twice as much internal energy as a piece of iron at 100 degrees Celsius.
Answer the following statement true (T) or false (F)
As you go from a point where a gravitational field is strong to a point where the gravitational field gets weaker, the gravitational field lines get farther apart
Indicate whether the statement is true or false