In stress relaxation, the elastic strain rate is equal to _________the plastic strain rate.
Fill in the blank(s) with the appropriate word(s).
minus
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A disk and a hoop of the same mass and radius are released at the same time at the top of an inclined plane. If both are uniform, which one reaches the bottom of the incline first if there is no slipping?
A) The hoop B) The disk C) Both reach the bottom at the same time.
When a mixture of gases is placed in a container at a given temperature, the pressure in the container is equal to the sum of the pressures that the individual gases would exert if they separately occupied the entire container at the same temperature
. Given that air is basically a mixture of nitrogen, with a molecular weight of 28 g/mol, and oxygen, with a molecular weight of 32 g/mol, what must be the ratio of the mass of oxygen to the mass of nitrogen in air for air to have an effective molecular weight of 29? A) 8:21 B) 3:5 C) 5:7 D) 32:87 E) 3:7
When calculating the rate of a disease, which of the following is generally the denominator of the calculation?
a. Population infected b. Population at risk c. Total state population d. Total world population
What conditions are thought to be necessary for a terrestrial planet to have a strong magnetic field?
A) a molten metallic core only B) fast rotation only C) a rocky mantle only D) both a molten metallic core and reasonably fast rotation E) both a metal core and a rocky mantle