The ________ epoch explains the isotropy of the cosmic microwave background mapped by COBE
A) hydrogen dominated
B) matter dominated
C) inflationary
D) radiation dominated
E) dark energy dominated
C
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Pressure: Calculate the pressure exerted on the ground due to the weight of a 79-kg person standing on one foot. if the bottom of the person's foot is 13 cm wide and 28 cm long.
A. 2.1 × 104 Pa B. 2.2 × 103 Pa C. 4.8 × 104 Pa D. 5.3 × 104 Pa
Why is Earth's continental crust lower in density than seafloor crust?
A) Continental crust is made as the lowest-density seafloor crust melts and erupts to the surface near subduction zones. B) Continental crust is made from the volcanic rock called basalt. C) Continental crust comes from volcanoes, while seafloor crust comes from geysers. D) Continental crust comes from Earth's inner core, while seafloor crust comes from the outer core.
Protostars have not been observed, but are consistent with observations of young main sequence stars
Indicate whether the statement is true or false
A vector in the xy-plane has an x component of -7.50 units. What must be the y component of this vector so that its magnitude is 10.0 units. (Note: There are two possible answers.)
What will be an ideal response?