On average, how fast do the plates move on the Earth?
A) a few millimeters per century B) about 1 mile per hour
C) a few centimeters per year D) a few kilometers per year
C
You might also like to view...
What is the basic explanation for the origin of electromagnetic waves?
List and explain the four fundamental forces in nature
What will be an ideal response?
When we say an appliance "uses up" electricity, we are actually saying that
A) current disappears. B) electric charges are dissipated. C) the main power supply voltage is lowered. D) electrons are taken out of the circuit and put somewhere else. E) electrical energy changes to thermal energy.
In a double-slit experiment, the distance between the slits is 0.2 mm and the distance to the screen is 100 cm. What is the phase difference (in degrees) between the waves from the two slits arriving at a point 5 mm from the central maximum when the wavelength is 400 nm? (Convert your result so the angle is between 0 and 360°.)
a. 90° b. 180° c. 270° d. 360° e. 160°