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4 years ago

Imagine a glass box that is completely sealed and in that box is a cactus in a small pot. Which statement is most accurate?

1 answer:

Natasha2012 [34]4 years ago

3 0

The Answer Is B (: because if it was closed no light could get throw and its not d because air doesnt circulate throw water xD HOPE THIS HELPS ANSWER IS REALLY B ♥

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Can some help me with this question

Luba_88 [7]

The answer is 2000 I need 20 characters do djrjrkrir

3 0

4 years ago

Read 2 more answers

Quantum physics would most likely be needed to understand the motion of which of the following?

melisa1 [442]

The correct answer is A.

Quantum physics is the branch of science which deals with the behavior of matter and light on atomic and subatomic level. So, to understand the motion of an atom we would need quantum physics. Motion of a ball and a galaxy can be understood by Newtonian mechanics.

7 0

4 years ago

If the radius of an electron's orbit around a nucleus doubles but the wavelength remains unchanged, what happens to the number o

inessss [21]

Answer:

Number of electron wavelength will Double

Explanation:

let the radius = r and wavelength = λ

when R doubles and λ ( wavelength ) remains the same

The number of electron electron wavelengths will double as well

Using Bohr's angular momentum quantization to show this

attached below

3 0

3 years ago

if a body of mass 2kg moving with Velocity of 15m/s collides with a stationary body of same mass then after elastic collision 2n

pochemuha

Answer:

v = 15 [m/s]

Explanation:

To solve this problem we must use the principle of conservation of linear momentum, which tells us that momentum is equal to the product of mass by Velocity.

$P=m*v$

where:

P = linear momentum [kg*m/s]

m = mass = 2 [kg]

v = velocity = 15 [m/s]

$P=2*15\\P=30 [kg*m/s]$

Since we know that momentum is conserved, that is, all momentum is transferred to the second body, we can determine the velocity of the second body, since the mass is equal to that of the first body.

$30=2*v\\v = 30/2\\v = 15 [m/s]$

5 0

3 years ago

A concave mirror produces a real image that is three times as large as the object. If the object is 20 cm in front of the mirror

TiliK225 [7]

Answer:

The image is produced 60 cm behind the mirror

The focal length of the mirror is 30 cm

Explanation:

u = Object distance = 20 cm

v = Image distance

f = Focal length

m = Magnification = 3

$m=-\frac{v}{u}\\\Rightarrow 3=-\frac{v}{20}\\\Rightarrow v=-3\times 20\\\Rightarrow v=-60\ cm$

The image is produced 60 cm behind the mirror

$\frac{1}{f}=\frac{1}{u}+\frac{1}{v}\\\Rightarrow \frac{1}{f}=\frac{1}{20}+\frac{1}{-60}\\\Rightarrow \frac{1}{f}=\frac{1}{30}\\\Rightarrow f=\frac{30}{1}=30\ cm$

The focal length of the mirror is 30 cm

8 0

3 years ago