PHYSICS MIDDLE SCHOOL

Which scientists supported the idea that light is made of streams of particles? Check all that apply.

Answers

Answer 1
Answer:

Answer:

Albert Einstein and issac Newton

Explanation:
Answer 2
Answer:

Answer:

a and d

Explanation:

edge 2021

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Which of the following are made of repeating sugar units? Choose all answers that are correct. A. proteins B. nucleic acids C. carbohydrates D. lipids

Answers

Carbohydrates carbohydrates are repeating sugar units. They are the only ones that are repeating sugar units
C.Carbohydrates
They are the only one that repeats the sugar units

Hope this helps

A wave has a wavelength of 125 meters is move a distance of 300 m in 15s. What is its frequency? please help

Answers

   Frequency of any wave  =  (speed) / (wavelength)

                                           = (300m / 15s)  /  (125m)

                                           =  (300m)  /  (15s x 125m)

                                           =      (300) / (15 x 125)    (m/s-m)

                                           =             0.16 / sec  =  0.16 Hz . 

I need physics help!!

Answers

Answer: magnitude = 5 and angle = 160°

Explanation:

A vector has magnitude 5 and angle -20°

A vector can be written in terms of its components as :

\vec{A}=A_x\hat{i}+A_y\hat j \n \Rightarrow \vec A = A cos\theta \hat i+A sin\theta \hat j

using trigonometry identity:

sin θ = -sin ( 180 + θ )

cos θ = - cos (180 + θ)

Thus, we can write the same vector as:

\vec A = -A cos(180+\theta) \hat i+(-A) sin(180+\theta) \hat j

Magnitude |A|=√((-A)^2+(-A)^2) = A = 5

Thus, the magnitude would be A = 5 and angle = 180+θ= 180-20 = 160°

a student viewing a cell with a microscope observe a cell wall, a cell membrane,and a nucleus. The presence of these structures indicates that the student is looking at a cell from a

Answers

The answer should be Plant Cell

What occurs when an object travels in a curved path?

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An object following any type of curved motion will necessarily be changing its direction as it moves. This change in direction constitutes a change in velocity, since velocity is a vector, and, thus, velocity has both a size, the speed, and a direction. So, if an object travels in a curved path, it changes velocity, and, thus, accelerates. This acceleration must be tied to a force. Newton's laws of motion explain this. Therefore, whenever an object travels in a curved path, there must be an unbalanced force acting upon it.

What measures the radiation given off by earth

Answers

 i thinkits an instrument called seismograph. not sure
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