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Taya2010 [7]
4 years ago
7

Lizzie loves to stargaze at night. She has noticed that the moon appears to change shape over the course of the month, and she w

ants to investigate why this happens. She hypothesizes that the relationship of the sun, Earth, and moon creates shadows on the moon. She sets up an experiment with a lightbulb to represent the sun, a large beach ball to represent Earth, and a smaller foam ball to represent the moon. She researches the position of the sun, Earth, and moon at different times of a month and makes a model of the entire system.
Perform the following:


Identify the parts of the scientific method in Lizzie's experiment.

List at least three variables Lizzie should control during the experiment.

For each variable identified, give a specific suggestion for how Lizzie can control it. (Will give brainliest)
Physics
1 answer:
lapo4ka [179]4 years ago
8 0
First, she didn't need the beach ball, all she needed were the "Sun" and the "Moon". Second, the parts of the Scientific Method are the Observation, Question, Hypothesis, Experiment, and Data. I'm not sure if this helped, but, You're Welcome anyway
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Can sound travel through space? Why or why not?
DiKsa [7]

Answer:

I think sound does not travel at all in space. The vacuum of outer space has essentially zero air. Because sound is just vibrating air, space has no air to vibrate and therefore no sound. If you are sitting in a space ship and another space ship explodes, you would hear nothing.

Explanation:

5 0
3 years ago
A sound wave, with speed of 340 m/s has a frequency of 17,000 Hz. What
Fiesta28 [93]
Wavelength = speed / frequency = 340 / 17000 = 0.02 m
6 0
3 years ago
A runner is jogging in a straight line at a
murzikaleks [220]

Explanation:

The runner was 8.6km away from the finish line when the bird starts flying.

Therefore it takes the bird 8.6/14.4 = 0.60 hours for the bird to fly to the finish line.

In that 0.60 hours, the runner would have ran an extra 3.6km/h * 0.6h = 2.16km.

Now, the runner and the bird are flying towards each other. The distance between them is 8.6 - 2.16 = 6.44km and their combined speed is 18.0km.

Hence, they will meet in 6.44/18.0 = 0.36 hours.

Overall, the bird flew for 0.60 + 0.36 = 0.96 hours, and flew 14.4km/h * 0.96h = 13.8km.

4 0
3 years ago
When atoms form a bond, it is usually because each atom acquires a more stable arrangement of electrons in its electron shells.
liraira [26]
C. Usually when an atom loses or gains an electron, it is because it is trying to satisfy the Octet Rule. The Octet Rule states that an atom is at its stablest when it has 8 valence electrons (two in helium's case)

If you look on the periodic table, elements on the left (Alkaline Metals) are the most reactive because they only have one valence electron (or electron in the outer shell). Elements on the right (Noble Gases) are the least reactive because they have a full outer shell of 8 valence electrons.

Later on you will find that as stability decreases as you go down the periodic table but that is a discussion for a different time.
4 0
3 years ago
Read 2 more answers
If an athlete leaps vertically at 4.0m/s, what maximum height does he reach?
joja [24]
Hello
This is a problem of accelerated motion, where the acceleration involved is the gravitational acceleration: g=-9.81~m/s^2, and where the negative sign means it points downwards, against the direction of the motion.

Therefore, we can use the following formula to solve the problem:
v_f^2 = v_i^2 + 2gS
where v_i=4~m/s is the initial vertical velocity of the athlete, v_f=0 is the vertical velocity of the athlete at the maximum height (and v_f=0~m/s at maximum height of an accelerated motion) and S is the distance covered between the initial and final moment (i.e., it is the maximum height). Re-arranging the equation, we get
S= \frac{v_f^2-v_i^2}{2g}=0.82~m

3 0
3 years ago
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