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2 years ago

I really need help on this question, i cant figure out how to answer it, i really need help, everything is due tmrw, pls help

Physics

2 answers:

Sauron [17]2 years ago

7 0

Ok put the question

gizmo_the_mogwai [7]2 years ago

6 0

Answer:

Explanation:

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What role do plants serve in the oxygen cycle

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Plants,such as trees poduce oxygen to help animals like insects or humans can bresth snd surviave.

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3 years ago

Two metal spheres are suspended from strings. The

nikdorinn [45]

Answer:

B. A repulsive force of 8.0*10^3 N.

Explanation:

As we know by Coulomb's law that the electrostatic force between two charges is given as

$F = \frac{kq_1q_2}{r^2}$

here we know that

$q_1 = -2 \times 10^2 C$

$q_2 = -4 \times 10^{-8} C$

r = 3.0 m

now we have

$F = \frac{(9 \times 10^9)(2 \times 10^2)(4\times 10^{-8})}{3^2}$

$F = 8000 N$

since both charges are similar charges so they will repel each other by the force we calculated above so correct answer will be

B. A repulsive force of 8.0*10^3 N.

3 0

2 years ago

2. Determine the current in a 120-watt bulb plugged into a 120-volt outlet.

Sergio039 [100]

Answer:

1 ampere

Explanation:

Power = VI

V = voltage

I = current

Given

Power = 120 watts

V = 120 volts

Therefore

120 = 120 x I

Divide both sides by 120

120/120 = 120/120 x I

1 = I

I = 1 ampere

8 0

2 years ago

If racing alcohol has a mass density of 790kg/m3, what mass will a 1250-litre tank hold?

Marina86 [1]

Density = Mass per unit Volume
that is,
D = m / V

Now,
We've been provided with,

Density = 790 kg/m³
Volume = 1250 litres = 1.250 m³

Now,
$density = \frac{mass}{volume} \\ 790 = \frac{m}{1.250} \\ 790 \times 1.250 = m \\ m = 790 \times 1.250 \\ m = 790 \times \frac{1250}{1000} \\ m = 790 \times \frac{5}{4} \\ m = 197.5 \times 5 \\ m = \frac{1975}{10} \times 5 \\ m = \frac{1975}{2} = 987.5 \: kg$

987.5 kg of mass will a 1250 litres tank will hold.

Please Mark It As Brainliest Answer_

3 0

3 years ago