Explain why the spring and neap tides occur periodically
What will be an ideal response?
Twice a month, at new Moon and at full Moon, the Moon and Sun produce tidal bulges that add together and produce extreme tidal changes; high tide is very high, and low tide is very low. These are spring tides. At first- and third-quarter Moons, the Sun and Moon pull at right angles to each other, and the Sun's tides cancel out some of the Moon's tides. These are called neap tides.
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A constant volume and mass of helium gas at 77°C is heated so that the pressure of the gas doubles. What is the new temperature of the gas in Celsius degrees?
a. 154°C b. 273°C c. 427°C d. 700°C
The energy of a photon is proportional to the light's
a. wavelength. b. speed. c. frequency. d. intensity. e. two of the above.
In order of increasing frequency, which of the following is correct?
a. visible, radio, ultraviolet and x-ray b. infrared, visible, ultraviolet and gamma c. visible, gamma, ultraviolet and x-ray d. infrared, x-ray, visible and gamma
If an object is located in a region over which its potential energy is constant, the object is said to be in
A) neutral equilibrium. B) stable equilibrium. C) unstable equilibrium. D) positive equilibrium. E) negative equilibrium.