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amid [387]
2 years ago
11

Which statement describes the relationship of resistance and current? resistance is directly proportional to current because r =

v over i.. resistance is inversely proportional to current because r = . resistance is directly proportional to current because r = vi. resistance is inversely proportional to current because r = vi.
Physics
1 answer:
Karolina [17]2 years ago
6 0
Two different relationship resistance
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The electrical loads in _____ circuits each have the same voltage drop, with equals the total applied voltage of the circuit.
Vesna [10]

Answer:

The electrical loads in parallel circuits each have the same voltage drop, with equals the total applied voltage of the circuit.

Explanation:

I did some research and the voltage drop across any branch of a parallel circuit is the same as the applied voltage.

3 0
3 years ago
Which has more mass - a 5-kg bag of feathers or a 5-kg<br> cannon ball?
Semenov [28]

Answer:equal mass

Explanation:the mass of both is 5kg

7 0
2 years ago
Four point charges are individually brought from infinity and placed at the corners of a square. Each charge has the identical v
Brut [27]

To solve this problem we will apply the concept of voltage given by Coulomb's laws. From there we will define the charges and the distance, and we will obtain the total value of the potential difference in the system.

The length of diagonal is given as

l = 2a

The distance of the center of the square from each of the corners is

r = \frac{2a}{2}= a

The potential electric at the center due to each cornet charge is

V_1 = \frac{kQ_1}{r_1}

V_2 = \frac{kQ_2}{r_2}

V_3 = \frac{kQ_3}{r_3}

V_4 = \frac{kQ_4}{r_4}

The total electric potential at the center of the given square is

V = V_1+V_2+V_3+V_4

V = \frac{kQ_1}{r_1}+ \frac{kQ_2}{r_2}+\frac{kQ_3}{r_3}+\frac{kQ_4}{r_4}

Al the charges are equal, and the distance are equal to a, then

V = \frac{kQ}{a}+ \frac{kQ}{a}+\frac{kQ}{a}+\frac{kQ}{a}

V = \frac{4kQ}{a}

Therefore the correct option is E.

3 0
4 years ago
Which object is completely opaque?
Pavel [41]

Answer:

a

Explanation:

light can not pass through it completely

7 0
3 years ago
What formula do I use for the second question? For number 3 how is one energy converted to the other? ( using arrows ) I get num
Fed [463]
<u>#2</u>
Use the formula ... Kinetic energy = (1/2) x (mass) x (speed)²

<u>#3 - a).</u>
sun => energy travels as electromagnetic waves => reaches Earth as
         heat & light energy.

sun => absorbed in plants => eaten by animals => animals die =>
       decay into oil in millions of years => we burn the oil to get the energy.

<u>#3 - b).</u>
food I ate for lunch => metabolized into glucose by my body
       => some of it burned in my muscles to generate energy for immediate needs
       => the rest of it stored as fat for future needs.

<u>#3 - c).</u>
flower pot rolls off the ledge => gravity does work on it all the way down,
       producing the kinetic energy it has when it hits the floor.

<u>#3 - d).</u>
oil or natural gas is burned, releasing heat energy => energy is used
       to generate electricity => electricity flows through cables from the
       power generating plant to your home => hot plate plugged into the
       wall => turns electrical energy back into heat energy => heat energy
       is conducted into the bottom of the beaker, flows through the glass
       to the inside surface => heat energy is conducted from the inside of
       the glass to the water, which gets hotter as it absorbs more energy. 
=============================

<u>Note:</u>
#1 on the sheet is wrong.
"Work = force x distance"  that's correct
But 25-kg is the <em>mass</em> of the ball, <em>not </em>the gravitational <em>force </em>on it.
The force on it is (mass) x (gravity), called its "weight".
   That's (25-kg) x (9.8 m/s²) = 245 kg-m/s² = 245 newtons .
6 0
3 years ago
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