Answer:
B and D
Explanation:
A is wrong because objects with mass have gravity and the Earth and Sun both have mass. As we know, the Earth orbits around the Sun and the reason si because gravity.
B is corrects because throughout the whole universe there are objects like planets and meteors and more. All these objects have gravity because they have mass.
C Gravity pulls things together that is why we are on Earth and not pushed away into space.
D is correct, using Sun and a meteor. When a meteor comes within the gravity range of the sun, the sun pulls the meteor toward it. Without anything around the sun, nothing happens because there is nothing to pull.
Explanation :
(1) Wavelength of a wave is defined as the distance between two consecutive crests or troughs.
<em>In this case, the distance between two consecutive crests is maximum in B.</em>
(2) The energy of the wave depends on its amplitude. In this case,<em> </em><em>C shows maximum amplitude. So, it will have greatest energy.</em>
(3) number of cycles per unit time is called frequency of the wave. <em>In this case, C will have maximum frequency.</em>
(4) The amplitude of the wave is the maximum displacement of the particle. <em>In this case, wave A have the lowest amplitude.</em>
Hence, this is the required solution.
From the definition of average velocity,
,
and the fact that constant acceleration means
we can solve for the time :
There is an identity of sin(2pi-x) = -sin(x) and cos(2pi-x) = cos(x). This is what we are going to use.
<span>(7pi/6) = (2pi)-(pi/6)
</span>
Therefore:
<span>
1) sec(7pi/6) = 1/cos(2pi-(pi/6)) = 1/cos(pi/6) = 2sqrt(3)/3
</span>
<span>2) cos(7pi/6) = cos(pi/6) = sqrt(3)/2
I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!
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41.2 = h-1/2g(t-1)^2
<span> {-h = -1/2gt^2-1/2g+g*t-41.2
</span><span> {h = 1/2gt^2
</span><span> summing them up
</span><span> 0 = -1/2g+g*t-41.2
</span><span> 41.2 +4.9 = g*t
</span><span> t = 46.1/9.8 = 4.70 sec
</span><span> h = 1/2gt^2 =4.9*(4.70^2) = 108.241 m </span>