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avanturin [10]
3 years ago
14

Anna studies the color of her bedroom wall using different lights. In sunlight, she sees that the wall is white. Anna darkens th

e room and shines a beam of light that includes all the wavelengths of visible light onto the wall. In this light, what's the wall color that Anna sees?A.) no colorb.) all seven colors of visible lightc.) redd.) whitee.) black
Physics
2 answers:
vichka [17]3 years ago
7 0

Anna studies the color of her bedroom wall using different lights. In sunlight, she sees that the wall is white.

Then she gets an idea for an experiment. Anna darkens the room and shines a beam of light that includes all the wavelengths of visible light onto the wall.

In this light, the wall appears <em>white</em>.  (Choiced)

AlexFokin [52]3 years ago
6 0

Answer:

white

Explanation:

Anna will see aw white light on the wall. This is possible for a simple reason: Light, as we see it is a mixture of lights of different wavelengths. The different wavelengths mix and merge to give light that appears to be monochromatic - meaning of one wavelength. This single wavelength light is also of a single color. Inadvertently, the light will appear to be white.

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When can a theory be modified if a new type of technology allows for new observations that raise new questions?
olga nikolaevna [1]

Answer:

id say B, but not sure

Explanation:

4 0
3 years ago
Read 2 more answers
A shell is fired at an angle of 35° above the horizontal at a velocity of 40 m/s. (a) What is it's speed at the highest point of
Fudgin [204]

Answer:

Part a)

v_f = v_x = 32.77 m/s

Part b)

T = 4.68 s

Explanation:

Part a)

Shell is fired at speed of 40 m/s at angle of 35 degree

so here we have

v_x = 40 cos35 = 32.77 m/s

v_y = 40 sin35 = 22.94 m/s

since gravity act opposite to vertical speed of the shell so at the highest point of its trajectory the vertical component of the speed will become zero

so at the highest point the speed is given

v_f = 32.77 m/s

Part b)

After completing the motion we know that the displacement of the object will be zero in Y direction

so we have

\Delta y = 0

0 = v_y t - \frac{1}{2}gt^2

T = \frac{2v_y}{g}

T = \frac{2(22.94)}{9.81} = 4.68 s

7 0
3 years ago
Which of the following is not a step in the inquiry process
padilas [110]

"The process used by scientific investigations is the scientific method. This involves making an observation, stating a question, formulating a hypothesis, conducting an experiment and analyzing the results to form a conclusion. "

I would most likely go with B. but im not 100% sure

8 0
3 years ago
Which of the following describes the variable that responds to a change?
timama [110]
Dependent variable is your answer.
8 0
2 years ago
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A skater slides across the ice with an initial velocity of 5.0 m/s. She slows 10 points
zvonat [6]

Explanation:

Given that,

The initial velocity of a skater is, u = 5 m/s

She slows to a velocity of 2 m/s over a distance of 20 m.

We can find the acceleration of skater. It is equal to the rate of change of velocity. So, it can be calculated using third equation of motion as follows :

v^2-u^2=2as

a = acceleration

a=\dfrac{v^2-u^2}{2s}\\\\a=\dfrac{(2)^2-(5)^2}{2\times 20}\\\\a=-0.525\ m/s^2

So, her acceleration is 0.525\ m/s^2 and she is deaccelerating. Also, her initial velocity is given i.e. 5 m/s.

7 0
2 years ago
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