What does Einstein's cosmological constant represent in his equations of general relativity?
A) the value of the expansion rate of the universe
B) the value of the acceleration of the universe
C) the value that measures the strength of gravity across the universe
D) the size of the cosmological horizon
E) a repulsive force that can counteract gravity
E) a repulsive force that can counteract gravity
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For a specimen of 1020 steel with the stress-strain diagram shown in Figure 6.17, calculate the maximum load-carrying capacity for a standard tensile test specimen as shown in Figure 6.15a.
What will be an ideal response?
Assume that an interionic pair potential between K+ and Cl– ions can be approximated by Equation 2.15. Assume that the repulsive ion core interactions can be modeled with a power of m=12. Experimentally it has been determined that the energy to separate one pair of K+ and Cl– ions is 5.0 eV, and that the equilibrium interionic separation is equal to 0.266 nm. Use this experimental data to determine the value of B for an ion pair. Use the SI system of units for this problem.
What will be an ideal response?
The pitch of a guitar relates to the string's
A) length. B) tension. C) mass. D) all the above E) none of the above
Denmark is the world leader in installed percentage of renewable energy
What will be an ideal response?