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Nataly [62]
3 years ago
13

As an electron in an atom moves from the ground state to the excited state, the electron (1) gains energy as it moves to a highe

r energy level (2) gains energy as it moves to a lower energy level (3) loses energy as it moves to a higher energy level (4) loses energy as it moves to a lower energy level
Chemistry
1 answer:
yawa3891 [41]3 years ago
5 0
Electron requires energy to move from ground state to excited state(higher energy levels). Hence option 1 is correct. Hope this helps!
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A projectile is fired with speed v0 at an angle theta from the horizontal from the horizontal as shown in the figure.
irga5000 [103]

Answer:

v₀ = √(2gH/(sin²θ)) = (sin θ)√(2gH)

v₀ = √(gR/(sin2θ))

Explanation:

An image of the artillery officer, the hill and path of motionof the projectile is attached to this solution.

Given, R, H, g and θ (theta)

Using the equations of motion, we can get the initial velocity v₀

First of, we need to resolve this motion into the vertical and horizontal axis.

The horizontal component of the initial velocity, v₀ₓ = v₀ cos θ

Vertical component of the initial velocity, v₀ᵧ = v₀ sin θ

When the projectile reaches maximum height, Velocity at max height, vₕ = 0m/s

From equations of motion,

vₕ = v₀ᵧ - gt

0 = v₀ sinθ - gt

t = v₀ sinθ/g

This is the time taken to reach maximum height. The time take to comolete the toyal flight, T = 2t = (2v₀ sinθ)/g

The maximum height to be reached, H can be calculated from the equations of motion too

H = vₕt - 0.5gt² = 0 - 0.5g((v₀ sinθ)/g)²

H = (0.5g v₀² sin²θ)/g²

H = (v₀² sin²θ)/2g

The range, or horizontal distance to be covered by the projectile, R, will be calculated using the horizontal component of the initial Velocity, v₀ₓ = v₀ cos θ, this horizontal velocity is constant all through the motion, so, no acceleration in the horizontal direction.

R = v₀ₓT =  (v₀ cos θ)((2v₀ sinθ)/g)

R = (v₀²(2cosθsinθ)/g)

2cosθsinθ = sin2θ

R = v₀²(sin2θ)/g

So, writing v₀ in terms of all the other parameters,

v₀ = √(2gH/(sin²θ)) =  (sinθ)√(2gH

v₀ = √(gR/(sin2θ))

4 0
2 years ago
PLEASE PLEASE HELPPP ITS DUE SOON ILL GIVE BRAINLIEST
gayaneshka [121]

Answer:

Explanation:

Using at least three sentences,, explain the four stages involved in genetic engineering/gene cloning.

Stage 1: Isolation of the target gene

Stage 2: Insertation of the target gene

Stage 3: Introduction of the vector into a host

Stage 4: Amplification of the target gene by the host cell and screening

8 0
3 years ago
A water molecule is positively charged at one end and negatively charged at the other end and is said to be \what type of molecu
Mrrafil [7]

Answer:

B. Polar

Explanation:

Hope this helps!

6 0
2 years ago
Which event is caused by gravity?​
Oxana [17]

Answer:

C

Explanation:

Cause waves causes gravity to make higher waves

6 0
3 years ago
If an atom has 5 protons, how many electrons does it have?
IRISSAK [1]

Answer:

5

Explanation:

An atom has the same number of protons and electrons

8 0
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