A _____ magnetic field can create an electric current.

While researching life during colonial times, Carson learns that people would extract potassium hydroxide from wood ashes and mi

Artemon [7]

The colonists were making soap. A lot of people don't know that soap is the result of reacting a base (potassium hydroxide) and an acid (animal fat) which produces a salt which is the white stuff we see in soap. This process is called saponification. Manufacturers just put additives like colors and scents to make them more appealing.

7 0

4 years ago

Read 2 more answers

What is the best description of the destructive interference of light?

Lelechka [254]

Answer:

B. Two waves have displaced in opposite directions

Explanation:

Interference occurs when two waves meet at a point in space. When this occurs, two extreme conditions can occur:

- if the two waves are in phase (=displacement in the same direction), the amplitude of the resultant wave is equal to the sum of the amplitudes of the two waves:

A = A1 + A2

and this condition is called constructive interference

- if the two waves are in anti-phase (=displacement in opposite directions), the amplitude of the resultant wave is equal to the difference of the amplitudes of the two waves:

A = |A1 - A2|

and this condition is called destructive interference. Note that if A1=A2, the amplitude of the resultant wave is zero.

6 0

3 years ago

A balloon contains helium gas. Which applies to the volume of the gas in the balloon when pressure is increased at constant temp

svetlana [45]

Answer:

the volume of the gas decreases

Explanation:

As a balloon rises through the atmosphere, the air pressure around it decreases and the balloon expands.

Good luck!

8 0

3 years ago

you stop the stopwatch at 4.0 s, but you notice a short time later that the same ant is at 0.81 m on the meter stick. Assuming t

telo118 [61]

The time elapsed since you stopped the stopwatch is 0.41 s.

<em>Your question is not complete, it seems to be missing the following information;</em>

"The velocity of the ant is 2 m/s"

The given parameters;

velocity of the ant, v = 2 m/s

change in position of the ant, Δx = 0.81 m

initial time, t₁ = 4 s

time when the ant was noticed, = t₂

Velocity is defined as the change in displacement per change in time of motion of an object.

$v = \frac{\Delta x}{\Delta t} = \frac{\Delta x}{t_2 - t_1} \\\\t_2 -t_1 = \frac{\Delta x}{v} \\\\t_2 - 4 = \frac{0.81}{2} \\\\t_2 - 4 = 0.405\\\\t_2 = 0.405 + 4\\\\t_2 = 4.405 \approx 4.41 \ s$