The unit of electric potential or electromotive force is the _____.volt
ohm
ampere
franklin

Answers

Answer 1

Answer: VOLT is the unit of electric potential or electromotiveforce. The term volt is used to honour an Italian physicist who invented thevoltaic pile, Alessandro Volta.

Volt is a measure of electric potential. Electric potential,a type of potential energy that could bereleased if electric current is allowed to flow.

Its formulas would be:
V = potential energy / charge
V = N * m / coulomb
V = kg * m * m / s² * A * s = kg * m² / A * s³
V = A * Ω
V = W / A
V = J / C
V = eV / e

ohm (Ω) is the unit of electrical resistance.
ampere (A) is the unit for measuring the strength of an electriccurrent
watt (W) is the unit of electrical power

Answer 2

Answer: the unit of electromotive force is volt

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How would you characterize the flame test with respect to its sensitivity

Answers

Answer:

Flame test is the procedure to find out the metal ions in the ionic compounds. By observing the color of flame we find out the presence of certain metallic ion. For example if we take the test of copper halide, the flame will become of the bluish green color due to the copper ion. You can perform the test with the common salt. Upon putting it on the flame, the color of flame will become yellow due to the presence of sodium ion. Similarly aluminium shows blue and calcium brick red etc.

Explanation:

Final answer:

The flame test, used in chemistry to identify certain substances through the color of their flame, has limited sensitivity, as some elements produce similar flame colors and multiple elements in a sample can complicate interpretation. Still, it remains a valuable tool in qualitative analysis. Other assessments, such as the NFPA 704 Hazard Identification System, can help understand the reactiveness and flammability of substances.

Explanation:

Characterizing the flame test with respect to its sensitivity involves understanding the minimal amount of a compound that the test can detect. Just like our senses have an absolute threshold for detection, so does the flame test. It can identify the presence of various elements in a compound based on the color of the flame. For example, sodium and its compounds impart a bright yellow color to a flame whereas lithium creates a bright, crimson color.

Despite its usefulness, the flame test may not be the most sensitive method for substance identification. Some elements may produce similar flame colors, making it difficult to distinguish between them. Moreover, the presence of multiple elements in a sample can also complicate the interpretation of flame test results. Therefore, while the flame test is a valuable tool in qualitative analysis, its sensitivity is somewhat limited.

According to the National Fire Protection Agency (NFPA) 704 Hazard Identification System, each substance has its own degree of hazard that ranges from 0 to 4. This information is critical in understanding the reactivity and flammability of substances, and is another aspect to consider when characterizing the sensitivity of the flame test.

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During exercise, the amount of ____________ carried in the blood to the muscles increases.

Answers

The correct answer is: Oxygen

Explanation:
In order to function properly (movement etc.) during exercise, muscles require oxygen. During exercise, the depth as well as the rate of breathing increase, which in turn increases the amount of oxygen inhaled. In order to expand and contract lungs and for other bodily movements, muscles require oxygen, and for that, more oxygen is carried in the blood to muscles. Hence, the correct answer is Oxygen.

Your answer would be oxygen because when doing moderate to vigorous workouts, your body needs more oxygen to be supplied to your muscles.

The source of the sun's heat is A. nuclear fission.
B. nuclear disintegration.
C. nuclear fusion.
D. nuclear separation.

Answers

The core of the sun is so hot and there is so much pressure, nuclear fusion takes place:hydrogen is changed to helium. Nuclear fusion creates heat and photons (light). The sun's surface is about 6,000 Kelvin, which is 10,340 degrees Fahrenheit (5,726 degrees Celsius).

Answer:

C. nuclear fusion.

Explanation:

The core of the sun is so hot and there is so much pressure, nuclear fusion takes place: hydrogen is changed to helium. Nuclear fusion creates heat and photons (light). The sun's surface is about 6,000 Kelvin, which is 10,340 degrees Fahrenheit (5,726 degrees Celsius).

What is the pendulum length whose period is 2.0s ?

Answers

$Formula\ for\ period:\n\ T=2 \pi \sqrt{(L)/(g)}\n\ g-gravity=9,8 (m)/(s^2) ,\ L-pendulum \ length \n\n (T)/(2 \pi ) = \sqrt{ (L)/(g) }|square\n\n (T^2)/(2 \pi ) = (L)/(g) \n\n\ (T^2)/(2 \pi )*g=L\n\n L= (2^2)/(2*3,14 )*9,8= (39,2)/(6,28) =6,24m$ $T=2 \pi \sqrt{(L)/(g)} \n (T)/(2 \pi ) = \sqrt{ (L)/(g) }|square\n (T^2)/(2 \pi ) = (L)/(g) \n (T^2)/(2 \pi )*g=L\n L= (2^2)/(2*3,14 )*9,8= (39,2)/(6,28) =6,24m$

Suppose the angular separation of two stars is smaller than the angular resolution of your eyes. How will the stars appear to your eyes?

Answers

Answer:

The two stars will look like a single point of light.

Explanation:

When the angular separation is smaller than angular resolution, the eye will not be able to resolve the stars thus they will appear like a point source of light.Angular resolution is one of the limit that our eyes can see. Angular resolution describes how much our eyes can distinguish two things apart which depends on the angle created by the incoming light rays from the two object. A smaller angle, very small angle for light rays to enter the eye thus little or no details for the eye to distinguish.

Final answer:

When two stars are closer together than the angular resolution of our eyes, they appear as a single point of light.

Explanation:

When the angular separation of two stars is smaller than the angular resolution of our eyes, they will appear as a single point of light to our eyes. This is because our eyes cannot distinguish the individual stars due to their close proximity. This is similar to how distant stars appear as pinpoints of light.

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A whale comes to the surface to breathe and then dives at an angle of 20.0 ∘ below the horizontal. If the whale continues in a straight line for 200 m , how deep is it?

Answers

Answer:

The depth is 68.4 meters.

Explanation:

In this question the whale rose to the surface of the ocean to breath and then dives into the ocean at an angle of 20° below the horizontal line. It then travels 200 m straight along this line. We have to determine the depth of the ocean.

The path of the whale forms the hypotenuse of a right triangle and the angle between the hypotenuse and base is given as 20°. Determination of sides or angles in a right triangle can be determines using trigonometry.

sinθ = $((opposite \ side))/(hypotenuse)$