What is the purpose of the lab, the importance of the topic, and the question you are trying to answer?
What will be an ideal response?
Answer: The purpose of the lab is to determine and learn about Newton’s first two laws. It teaches about the impact that forces and laws have on the car and washer on the different types of tracks. It is important to show how Newton’s laws affect our everyday lives.
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If Venus and Earth outgassed a similar amount of CO2 early in their histories, why are their surface temperatures so different today?
a. Venus didn’t contain any water, so couldn’t be dissolved and converted into sediments. Therefore, the runaway greenhouse effect made its surface much hotter. b. Venus was closer to the Sun, water tended to be in the atmosphere rather than in oceans, and couldn’t be dissolved. Therefore, the runaway greenhouse effect made the surface of Venus much hotter c. Venus’s moon fell onto the planet with a catastrophic impact, producing massive ejecta and increasing the abundance of in the atmosphere. Therefore, the greenhouse effect made its surface much hotter. d. Venus didn’t have a detectable magnetic field, so the solar wind reached Venus’s surface and evaporated additional from the crust, increasing the greenhouse effect and making its surface much hotter.
Projectile Motion: A child is trying to throw a ball over a fence. She gives the ball an initial speed of 8.0 m/s at an angle of 40° above the horizontal. The ball leaves her hand 1.0 m above the ground and the fence is 2.0 m high. The ball just clears the fence while still traveling upwards and experiences no significant air resistance. How far is the child from the fence?
A. 0.73 m B. 1.6 m C. 2.7 m D. 3.8 m E. 7.5 m
The energy difference between adjacent orbit radii in a hydrogen atom
A) decreases with increasing values of n. B) increases with increasing values of n. C) remains constant for all values of n. D) varies randomly with increasing values of n.
For a compound composed of ions, the smallest combination of ions that gives the formula of the compound is called a
a. molecule. b. polyionic atom. c. polyatomic ion. d. formula unit.