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S_A_V [24]
2 years ago
14

What is an electric current​

Physics
2 answers:
Daniel [21]2 years ago
8 0

Answer:

Electric current is electric charge in motion. It can take the form of a sudden discharge of static electricity, such as a lightning bolt or a spark between your finger and a ground light switch plate. ... Most electric charge is carried by the electrons and protons within an atom.

Colt1911 [192]2 years ago
7 0
We’re you put two wires on the side of batteries and light in the middle when you do that the light will turn on
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The basketball would be sun then baseball earth and finally golf ball moon.
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2 years ago
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If the average speed of a person was 1.2 meters/second, does this mean that their speed was exactly 1.2 meters/second the whole
alexandr1967 [171]

Average speed is defined by the following formula

v = \frac{D}{t}

here

D = total distance that an object move from its initial position to final position

t = total time of the motion

so here we will say that there is no such relation between initial or final speed or we can say maximum or minimum speed of object with average speed of object.

We only need to find the total distance and total time of motion in order to find the average speed

here we can see many examples like let say an object moves with speed v1 for time t1 and then with speed v2 for time t2 then here average speed is given as

d = v_1 t_1 + v_2t_2

since we know that distance covered is product of speed and time

that's why we used above equation for finding total distance

now the average speed will be

v_{avg} = \frac{v_1t_1 + v_2 t_2}{t_1 + t_2}

so this is how we can find the average speed for above motion

so average speed is always between maximum and minimum speed any value in-between.

It is neither the maximum value nor it is minimum value

7 0
3 years ago
A wooden block of dimensions of 6 cm ⨯ 6 cm ⨯ 15 cm floats with the long axis oriented horizontally and the of the square faces
schepotkina [342]

Explanation:

(a)  Formula to calculate volume of the submerged wooden block is as follows.

            V_{sub} = l \times w \times d

It is given data of the wooden block is as follows.

          depth = 7.96 cm,       length (l) = 6 cm

         width (w) = 4 cm,      

So, we will calculate the volume of the submerged wooden block as follows.

           V_{sub} = l \times w \times d

                       = 6 \times 6 \times 7.96

                       = 286.56  cm^{3}

Hence,  the submerged volume of the block is 286.56  cm^{3}.

(b)   Expression for the buoyant force acting on the wooden block is as follows.

            F_{B} = \rho_{w} g V_{sub}

And, expression for the force of gravity of the wooden block is as follows.

            F_{g} = m_{b}g

As the wooden block is floating on the water hence, buoyant force is balanced by the weight of the block.

                 F_{g} = F_{B}

Hence, mass of the wooden block will be calculated as follows.

         F_{g} = F_{B}

       m_{b}g = \rho_{w}gV_{sub}

          m_{b} = \rho_{w}V_{sub}

                      = 997 kg/m^{3} \times 286.56 cm^{3}

                      = 997 kg/m^{3} \times 286.56 \times 10^{-6} m^{3}

                      = 0.02857 kg

Therefore, mass of the given block is 0.02857 kg

(c)   Expression for the density of the block is as follows.

             \rho_{b} = \frac{m_{b}}{V_{b}}

Now, expression for the total volume of the wooden block is as follows.

             V_{b} = l \times w \times h

Hence, density of the given block is as follows.

              \rho_{b} = \frac{m_{b}}{V_{b}}

                         = \frac{m_{b}}{lwh}

                         = \frac{0.02857 kg}{4 \times 4 \times 15}

                         = 1.19 \times 10^{-4} kg/cm^{3}

Therefore, density of the given block is 1.19 \times 10^{-4} kg/cm^{3}.

3 0
3 years ago
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!!
zhannawk [14.2K]
<h3>Answer;</h3>

A- Potential energy

B-  Kinetic energy

C- Potential energy

D - Both potential energy and kinetic energy

E- Both potential and kinetic energy

Potential energy is the energy possessed by the body while at rest. It is calculated by the formula mgh, where m is the mass of the body and h is the height, and g is the gravitational acceleration.

Kinetic energy on the other hand is the energy possessed by the body while in motion. It is calculated by the formula 1/2mv², where m is the mass and v is the velocity of the object or body in motion.

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3 years ago
Based on what you have just read, why is studying atoms and their parts and particles helpful to people?
Pavlova-9 [17]
Studying the structure of atoms and its sub-atomic particles is very important so that we could figure out a way on how to use our knowledge on it efficiently. Nuclear energy is one of the most powerful energies that needs to be properly harnessed and with adequate knowledge of the nuclear reactions, we could prevent nuclear disasters. 
8 0
3 years ago
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