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olga nikolaevna [1]
3 years ago
8

Which statements about electric field lines are correct? Check all that apply.

Physics
2 answers:
kondaur [170]3 years ago
4 0

Answer: The correct statements are "They point away from a positive charge" and "They never cross".

Explanation:

Electric field lines are the regions around the charged particle in which the electric force can be experienced.

The properties of the electric fields are as follows:

(1) The two electric field lines never cross each other. Otherwise, it will point to different direction at a point.

(2) The electric field is directed outward for the positive charge.

(3)The electric field is directed inward for the negative charge.

Therefore, the correct statements are "They point away from a positive charge" and "They never cross".

pochemuha3 years ago
3 0
They point towards a negative charge.
They point away from a positive charge.
They never cross.
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pshichka [43]

Let , speed of bowling ball is v .

Time taken by ball to hit the pins , t=\dfrac{16.5}{v} .

Speed of sound , u = 343 m/s .

Time taken by sound to reach ear , T=\dfrac{16.5}{343}=0.048\ s .

Now ,

Time taken by sound to hear after release :

2.79=\dfrac{16.5}{V}+0.048\\\\2.79-0.048=\dfrac{16.5}{V}\\\\2.742=\dfrac{16.5}{V}\\\\V=\dfrac{16.5}{2.742}\\\\V=6.02\ m/s

Hence , this is the required solution .

4 0
3 years ago
a toboggan loaded with vacationing students (total weight 1300 N) slides down a slope at 30 degrees and there is no friction. wh
sasho [114]

Answer:

The acceleration of the sliding toboggan is, a = 4.9 m/s²

Explanation:

Given data,

The total weight of the toboggan, W = 1300 N

The slope is, Ф = 30°

The acceleration of a body under the influence of the gravitational field does not depend on its mass, size and shape in the absence of the air resistance.

Therefore,

The acceleration of the toboggan is given by the formula,

                           a = g Sin Ф

Substituting the given values in the above equation,

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Hence, the acceleration of the sliding toboggan is, a = 4.9 m/s²

4 0
3 years ago
A ball is dropped from the top of a building.
kotegsom [21]

Answer:

after it has hit the ground

5 0
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Julli [10]

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A. Social Science

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3 0
3 years ago
The mass of a lift is 600kg.the. The maximum tensile force that the cable supporting the lift can withstand is 7kN. Calculate th
Oksi-84 [34.3K]
Force is the product of mass and acceleration .
The question is ask to find acceleration.
But acceleration is the ratio of the force and the mass.
where 600kg is the mass and 7kN is the force
NB: kilo is 1000
now we have to multiply 7N by 1000
by doing so you will have 7000N
which is the force.
Now to find the acceleration: force/ mass
which is 7000/600
therefore the maximum acceleration is 11.667


5 0
3 years ago
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