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Misha Larkins [42]

3 years ago

8

When placed at a certain point, a 4.20 C charge feels an electric force of 2.55 N. What is the magnitude of the electric field a

t that point?
(Remember, magnitudes are always positive.) (Unit = N/C)

2 answers:

Igoryamba3 years ago

6 0

0.607 N/C, working shown on photo

Art [367]3 years ago

5 0

Answer:

B. 625 N

Explanation:

Its the right answer i just took the test

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two vehicles have a head on collision. one vehicle has a mass of 3000 kg and moves at 25 m/s while the second vehicle has a mass

emmasim [6.3K]

Answer:

The speed of the combined vehicles is 6.82m/s

Explanation:

Using the law of conservation of momentum which stayed that the sum of momentum of bodies before collision is equal to their sum of momentum after collision. After collision, both object moves with the same velocity.

Momentum = mass×velocity

Before collision:

Momentum of vehicle or mass 3000kg moving with velocity 25m/s

= 3000×25

= 75000kgm/s

Pa = 75000kgm/s

Momentum of vehicle with mass 2500kg moving with velocity of -15m/s

= 2500×-15

= -37500kgm/s

After collision:

Momentum = (3000+2500)V

Where v is their common velocity

Momentum after collision = 5500V

Based on the law:

75000+(-37500) = 5500V

75000-37500 = 5500V

37500 = 5500V

V = 37500/5500

V = 6.82m/s

7 0

3 years ago

Horizontal rows are called ( )<br> and represent ( ) levels. <br> () are why I need answers plz

Rudiy27

Answer:

1. Periods; that are what horizontal rows on a periodic table are called.

2. Each period represents the number of levels

Explanation:

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4 years ago

Improving our use of both solar energy and wind energy will depend on the development of batteries. Why are these two energy sou

victus00 [196]

Answer:

The batteries make it possible to store the electricity generated when the sun and wind peak so it can be available to the grid when electricity demand is at its peak.

Explanation:

Hope this helps!

If not, I am sorry.

4 0

3 years ago

A heater has resistance of 10 ohms. It operates at 120 volts. a. What is the current through the heater?

Natali5045456 [20]

Answer:

I = 12 A

Explanation:

For this exercise we use the relationship that voltage is proportional to the product of current and resistance

V = I R

I = V / R

let's calculate

I = 120/10

I = 12 A

4 0

3 years ago

9.58 A spring of equilibrium length L1 and spring constant k1 hangs from the ceiling. Mass m1 is suspended from its lower end. T

andrey2020 [161]

Answer:

The distance of m2 from the ceiling is L1 +L2 + m1g/k1 + m2g/k1 + m2g/k2.

See attachment below for full solution

Explanation:

This is so because the the attached mass m1 on the spring causes the first spring to stretch by a distance of m1g/k1 (hookes law). This plus the equilibrium lengtb of the spring gives the position of the mass m1 from the ceiling. The second mass mass m2 causes both springs 1 and 2 to stretch by an amout proportional to its weight just like above. The respective stretchings are m2g/k1 for spring 1 and m2g/k2 for spring 2. These plus the position of m1 and the equilibrium length of spring 2 L2 gives the distance of L2 from the ceiling.

4 0

4 years ago