In which of the following eons did a significant amount of oxygen gas exist in Earth's atmosphere?

a| Hadean

b| Archean

c| Proterozoic

d| No answer text provided.

Our sun has a low absolute magnitude compared to many other stars but appears very bright to us because of its relative closeness to Earth exetremly large size low luminosity

A jet plane is flying at a constant altitude. at time t1=0 it has components of velocity vx = 94 m/s, vy = 110 m/s. at time t2 = 33.5 s the components are vx = 175 m/s, vy = 45 m/s. part a for this time interval calculate the average acceleration.

How much work should be done to lift a 5kg brick to the height of 12m

Explain patient financial obligations for services rendered

Accidentally a glass filled with water dropped and broke. This an example of a? a. chemical change b. chemical property c. physical change d. physical property

Resistors in parallel together contain less resistance than resistors in series together. Create an analogy to explain this phenomena and post it here.

Unlike the idealized voltmeter, a real voltmeter has a resistance that is not infinitely large. part a a voltmeter with resistance rv is connected across the terminals of a battery of emf e and internal resistance r.

The acceleration of an object is the slope of its velocity-time graph. True False

When a cannon fires a cannonball, the cannon will recoil backward because the?

True or False: As we learn more about organisms how we classify them can continue to change. O True O False