Physically, the type of energy represented by the water behind a dam is
A) kinetic.
B) thermal.
C) chemical.
D) electromagnetic.
E) gravitational.
E
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The vertical speed of a projectile
a. is zero b. stays constant c. continuously increases d. continuously decreases e. sometimes decreases and sometimes increases
(a) Develop an equation for the time at which the plastic (viscous) strain is equal to the elastic strain in a Maxwell solid (series spring and dashpot) subject to a stress (?) where the viscous component is Newtonian (n=1).
(b) Determine the time (t) when the plastic strain is equal to the elastic strain in quartz subject to a stress of 35 MPa at 1250 K, if the viscosity is equal to 1014 Pa·s and the elastic modulus is equal to 70×109 Pa, assuming that the quartz behaves as a Maxwell solid. (c) Determine the total strain at the time (t).
Only during the last decade of the twentieth century did the Arctic began to experience an ozone hole and formation of polar stratospheric clouds, and the hole expanded in a regular way after it appeared
What does this indicate about Arctic stratospheric temperatures during this period? Explain.
Gases in equilibrium in the atmosphere are not subject to rapid (year-to-year) fluctuations
What will be an ideal response?