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3 years ago

What type of energy travels in the form of electromagnetic waves?

Chemistry

1 answer:

almond37 [142]3 years ago

3 0

Light/thermal. Charges move back and forth which move at the speed of light

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A particle with a charge of 9.40 nC is in a uniform electric field directed to the left. Another force, in addition to the elect

juin [17]

Answer:

a. Work done by the electric force = -2.85 * ×10⁻⁵ J

b. The potential of the starting point with respect to the end point = -3.03 * 10³ V

c. The magnitude of the electric field is 33.7kV/m

Explanation:

Given.

Charge = Q = 9.40 nC

Distance = d = 9.00 cm = 0.09m

Amount of work = 7.10×10⁻⁵ J

Kinetic energy = K = 4.25×10⁻⁵ J

a. What work was done by the electric force?

This is calculated by; change in Kinetic Energy i.e. ∆KE

∆KE = ∆K2 - ∆Kæ

Where K2 = 4.25×10⁻⁵ J

The body is released at rest, so the initial velocity is 0.

So, K1 = 0

Also, total work done = W1 + W2

Where W2 = 7.10×10⁻⁵J

So, W1 + W2 = W = K2

W1 + 7.10×10⁻⁵ = 4.25×10⁻⁵

W1 = 4.25×10⁻⁵ - 7.10×10⁻⁵

W = -2.85 * ×10⁻⁵ J

Work done by the electric force = -2.85 * ×10⁻⁵ J

b. What is the potential of the starting point with respect to the end point?

The change in potential energy is given as

W = ∆U

W = Q|V2 - V1| where V1 = 0 because the body starts from rest

So, W = QV2

Make V the Subject of the formula

V2 = W/Q

V2 = -2.85 * ×10⁻⁵ J / 9.40 nC

V2 = -2.85 * ×10⁻⁵ J / 9.40 * 10^-9C

V2 = −3031.9148936170212765957V

V2 = -3.03 * 10³ V

The potential of the starting point with respect to the end point = -3.03 * 10³ V

c. What is the magnitude of the electric field?

The magnitude of the electric field is calculated as follows;

W = -Fd = -QEd

And E = V/d

E = -3.03 * 10³ V / 0.09 m

E = −33687.943262411347517730 V/m

E = -33.7kV/m

The magnitude of the electric field is 33.7kV/m

4 0

3 years ago

What are two types of rocket fuels we have used? Describe them.

Olenka [21]

Answer:

nasa will tel u

Explanation:

6 0

3 years ago

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Answer ASAP 25 points

kykrilka [37]

<u>Answer:</u> The correct answer is $NH_3$ is the base and $NH_4Cl$ is the salt.

<u>Explanation:</u>

Neutralization reaction is defined as the reaction in which an acid reacts with a base to produce salt and water as products.

According to the Bronsted-Lowry conjugate acid-base theory, an acid is defined as a substance which looses donates protons and a base is defined as a substance which accepts protons.

For the given chemical reaction:

$NH_3+HCl\rightarrow NH_4Cl$

Here, $NH_3$ is a base because it is accepting proton and HCl is an acid because it is loosing proton.

$NH_4Cl$ is considered as a salt because it is formed by the combination of acid and base.

Hence, the correct answer is $NH_3$ is the base and $NH_4Cl$ is the salt.

8 0

2 years ago

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Why is citric acid added to food?

dolphi86 [110]

Answer: Option (b) is the correct answer.

Explanation:

Chemical formula of citric acid is $C_{6}H_{8}O_{7}$ .

It is acidic in nature and therefore, it is used to add tartness or sour flavor to the food like jams, jellies, candies etc.

It is also used as a preservative and thus it helps to preserve various food items for a longer period of time.

3 0

3 years ago

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A 43.40 mg sample of an alcohol

Kitty [74]

The percentage composition of a given compound is defined as the ratio of the amount of each element to the total amount of individual elements present in the compound multiplied by 100

$\frac{15.1}{43.4} \times 100\%$

= 34.79 %

7 0

1 year ago