Which of the following describes the measure of current? a. The quality of the charge flow
b.The rate at which charge flows
c. The ability for something to have a charge flow
d.The potential for a charge to flow

Answers

Answer 1

Answer: Current is defined as the rate at which charge flows. The quantity that is current is directly affected by the voltage and the resistance of the circuit, where current is directly proportional to the voltage, and inversely to the resistance.

Among the choices, the correct answer is B.

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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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a 1.0-kg ball is thrown into the air with an initial velocity of 30. m/s. a. how much kinetic energy does the ball have? b. how much potential energy does the ball have when it reaches the top of its ascent? c. how high into the air did the ball travel?

Answers

a) Kinetic energy of ball is 450J.

A 1kg ball is thrown into the air with an initial velocity of 30m/s. Newtonian physics says thekinetic energy that the ball have is:

( $(1)/(2) )$ ×1 kg× $(30 (m)/(s)) ^(2)$ = 450 J.

In physics, what is kinetic energy?

The energy a thing has as a result of motion is known as kinetic energy. A force must be applied to a thing in order to accelerate it. We must put forth effort in order to apply a force. After the job is finished, energy is transferred to the thing, which then moves at a new, constant speed.

b) Potential energy of ball is 450J

The whole amount of energy will be in the form of potential energy since the ball's kinetic energy will be equal to zero. As a result, when the ball reaches the peak of its climb, its potential energy will be 450 J.

c) 45m high into the air ball travel.

KE at start = GPE at the peak

450 = mgh

450 = (1)(g)(h)

450= (1)(10)(h)

45=h

Therefore, the ball will reach up to a height of 45m.

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Movement that occurs along a straight line is called:

Answers

linear motion! hope i helped

Which force is always directed toward the center of a circle?A. normal force
B. nuclear force
C. centrifugal force
D. centripetal force

Answers

The answer is D. centripetal force
This definition of centripetal force is a force acting towards the center of an object moving in a circular motion. Acceleration is the rate of which velocity changes over a period of time. If you pick a point on say a rotating circle and find the tangential velocity at each point it goes through, the acceleration would be towards the middle.

Which two wire properties would provide the greatest resistance to the flow of a current?

Answers

Properties of wire, and things you can
do to it to make its resistance high:

-- Thickness. Make it as thin as a hair on a mosquito's leg.

-- Length. Make it long enough to go around the Earth.

-- Resistivity of the material. Make the wire out of glass or wood.

if this is science then I believe one is CONDUCTION not sure about second one but it may be something to do with the wires look and structure e.g matieral

On Planet X, an astronaut has maximum walking speed of 1.9 m/s. The astronaut's legs are each 1.3 m long. What is the constant of acceleration due to gravity on Planet X?A. 8.3 m/s2
B. 2.8 m/s2
C. 3.8 m/s2
D. 1.1 m/s2