2 years ago

You approach a railroad crossing with a cross buck sign that has no lights or gates. What should you do?

Physics

1 answer:

maxonik [38]2 years ago

6 0

Stop and look to see if anything is coming

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Does the surface tension of water affect the rate of evaporation? If so, would adding a surfactant speed up evaporation?

Goshia [24]

Answer:

The evaporation time gradually increased with the increase in surfactant concentration, i.e., from water to the concentration level of 0.005%. Furthermore, the evaporation time is significantly reduced, even lower than that of water containing relatively high concentrations from 0.01% to 0.1%.

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2 years ago

Carbon-13 is an isotope. It has 6 protons and _____.

Pani-rosa [81]

Carbon-13 has an atomic mass of 13.
Atomic mass is the sum of protons and neutrons.
There are 6 protons, so there are 13 - 6 = 7 neutrons.

Answer is 7 neutrons (and 6 electrons)

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3 years ago

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An electronic line judge camera captures the impact of a 57.0-g tennis ball traveling at 32.2 m/s with the side line of a tennis

mote1985 [20]

Answer:

average acceleration is 1.365 × $10^{4}$ m/s²

Explanation:

given data

initila speed u = -32.2 m/s

final speed v = 21.6 m/s

time taken t = 0.00394 s

solution

we get here average acceleration that will be express as

v = u + at ..........................1

put here value and we get

21.6 = -32.2 + a × 0.00394

solve it we get

a = 1.365 × $10^{4}$ m/s²

so average acceleration is 1.365 × $10^{4}$ m/s²

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2 years ago

If another vehicle is trying to pass your vehicle,

Vladimir [108]

Answer:

Reduce you're speed, and let the other vehicle pass you

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2 years ago

When heat is added to an object, what is happening to the item at the atomic level? (Check all that apply)

3241004551 [841]

Answer:

Explanation:

heat is energy, energy cannot be made or destroyed but transferred

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2 years ago

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