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SOVA2 [1]
3 years ago
13

27. The electric field around a positive charge is shown in the diagram. Describe the nature of these lines. Please use 2 conten

t related sentences

Physics
1 answer:
KIM [24]3 years ago
4 0

Answer:

Once we place a positive test at a point close to the sphere, we find that an electrostatic force is applied to the outside of the sphere. Therefore, at any point around the sphere, the electric field vector is radially outward.

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Lauryn serves a volleyball with a mass of 2.1 kg. The ball leaves her hand with a speed of 30 m/s.
Naya [18.7K]

Hi! Let's see.

<h3><u>TOPIC: Kinetic Energy.</u></h3>

Explanation:

Data:

  • Mass(m) = 2.1 kilograms
  • Speed(v) = 30 m/s
  • Kinetic Energy(Ek) = ?

==================================================================

Use the kinetic energy formula:

  • \boxed{\boxed{\bold{E_{k}=\frac{m*(v)^{2}}{2}}}}

Replace by the data:

  • \boxed{E_{k}=\frac{2.1kg*(30\frac{m}{s})^{2}}{2}}}}}

We multiply speed squared:

  • \boxed{E_{k}=\frac{2.1kg*900\frac{m}{s}}{2}}}

Multiply in the numerator, without forgetting the units:

  • \boxed{E_{k}=\frac{1890J}{2}}}}

Both numerator and denominador operations are divided:

  • \boxed{\bold{E_{k}=945\ J}}

Answer: The kinetic energy is <u>945 Joules.</u>

Cordially Alejanndraax. Greetings!

8 0
3 years ago
An object 10mm in height is located 20cm from a crown glass spherical surface whose power is +10.00DS. Locate the image
Tasya [4]

The image is present at 20cm from the crown glass spherical surface.

To find the answer, we need to know about the lens formula.

<h3>What's the lens formula?</h3>
  • It's (1/V)-(1/U)= (1/f)
  • V= image distance from the lens, U= object distance, f= focal length of the lens

<h3>What's the image distance, if object is present at 20cm from crown glass of power 10DS?</h3>
  • Focal length (f)= 1/ power = 1/10 = 0.1 m
  • U= -20cm = -0.2m (-ve sign due to sign convection)
  • (1/V)-(-1/0.2)= (1/0.1)

=> (1/V)+5=10

=> 1/V= 5

=> V=0.2m = 20cm

Thus, we can conclude that the image is present at 20cm.

Learn more about the lens formula here:

brainly.com/question/2098689

#SPJ1

7 0
2 years ago
Summary of set.........
Brrunno [24]

Answer:

Set for what? did U finish the question?

7 0
3 years ago
Read 2 more answers
An force of 50 N is applied to a shovel, which acts as a lever to
Levart [38]

Answer:

the answer is 18

Explanation:

900/50=18

3 0
3 years ago
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 Maglev trains, like the one shown in the picture, use magnet fields to travel up to 600 miles per hour. Magnets on the bottom o
alisha [4.7K]
The correct answer is A) <span>The two magnetic fields repel each other, causing the train to levitate, or hover, above the rails.
In fact, same magnetic poles repel each other, while opposite magnetic poles attract each other. the magnets on bottom of the train and on top of the railway have the same polarities, so they repel each other and this allows the train to levitate.
</span>
3 0
3 years ago
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