List at least two ways the sunspot cycle affects us on Earth
What will be an ideal response?
When the Sun is near solar maximum, it undergoes a much higher rate of violent activity in the form of solar flares. These flares are outbursts of charged particles that can affect radio communications on Earth. They also can create more auroras and can be a danger to satellites.
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Spiral tracers tend to be old, luminous stars
a. True b. False Indicate whether the statement is true or false
How does a rocket launch upward? Choose the statement that correctly answers the question.
A) By expelling gas downward, the rocket is propelled upward. B) Expelling gas downward, which by pushing against the ground, propels the rocket upward.
The dimensional equivalent of the quantity impulse in terms of the fundamental quantities (mass, length, time) is which of the following?
a. MLT?1 b. ML2T?2 c. MLT d. MLT?2
About 90% of UFO sightings
A) are hoaxes B) cannot be explained C) are real sightings of alien craft D) can be explained by natural phenomena