Two long parallel wires each carry a current of 5.0 A directed to the east. The two wires are separated by 8.0 cm. What is the magnitude of the magnetic field at a point that is 5.0 cm from each of the wires?
A. 72 ?T
B. 48 ?T
C. 24 ?T
D. 96 ?T
E. 32 ?T
Answer: C
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The graph below plots the escape velocity of several solar system objects along the vertical axis and the surface temperature along the horizontal. The lines plotted in the figure are the fastest speeds of gas particles as a function of temperature for various gases. Which of the gases plotted in this diagram could be retained by Miranda?
a.
only CO2
b.
only NH3
c.
CO2, NH3, and O2
d.
all of them
e.
none of them
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What will be an ideal response?
The more distant a star, the smaller its parallax
Indicate whether the statement is true or false
Find the final equilibrium temperature when 20.0 g of milk at 15.0°C is added to 155.0 g of coffee at 89.0°C. (Assume the specific heats of coffee and milk are the same as water and neglect the heat capacity of the container.) cwater = 1.00 cal/g/°C = 4 186 J/kg/°C
a. 80.5°C b. 100°C c. 104°C d. 77.1°C e. 78.9°C