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Alina [70]
3 years ago
13

A scientist claimed that fabric A is better able to resist fire than fabric B. Which option describes an experiment that will pr

oduce evidence that will support or refute her claim?
A. Make detailed measurements of each type of fabric to determine the thickness of fibers.

B. Hold each type of fabric over a candle flame and time how long it takes for the fabric to start to burn.

C. Combine Fabric A and Fabric B and measure the temperature at which they start to burn.

D. Measure how long it takes for a specific amount of Fabric A to burn up completely.
Physics
1 answer:
UNO [17]3 years ago
6 0

Answer:

B. Hold each type of fabric over a candle flame and time how long it takes for the fabric to start to burn.

Explanation:

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Although some experts consider that perhaps such a clear growth movement should not be considered tropism.

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MRCORRECT has answered the question

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A 269-turn solenoid is 102 cm long and has a radius of 2.3 cm. It carries a current of 3.9 A. What is the magnetic field inside
RUDIKE [14]

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Magnitude of the magnetic field inside the solenoid near its centre is 1.293 x 10⁻³ T

Explanation:

Given;

number of turns of solenoid, N = 269 turn

length of the solenoid, L = 102 cm = 1.02 m

radius of the solenoid, r = 2.3 cm = 0.023 m

current in the solenoid, I = 3.9 A

Magnitude of the magnetic field inside the solenoid near its centre is calculated as;

B = \frac{\mu_o NI}{l} \\\\

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B = \frac{4\pi*10^{-7} *269*3.9}{1.02} \\\\B = 1.293 *10^{-3} \ T

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