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ch4aika [34]
3 years ago
11

What formula gives the strength of an electric field, E, at a distance from a known source change?

Physics
2 answers:
Akimi4 [234]3 years ago
6 0

<u>Answer:</u>

The correct answer option is C. E = kq / d^2

<u>Explanation:</u>

Electric field strength is a vector quantity which means it has both the magnitude and a direction.

It can be defined as the strength of electrical force per unit charge at any given point in the electric field and can be denoted by E.

Therefore, the formula for the electric field strength is:

E = \frac{k .Q }{d^2}

My name is Ann [436]3 years ago
5 0

<em>C) E= kq/d^2</em>

Hoped this helped

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A mass of 148 g stretches a spring 13 cm. The mass is set in motion from its equlibrium position with a downward velocity of 10
Charra [1.4K]

Answer:

u(t)=1.15 \sin (8.68t)cm

0.3619sec

Explanation:

Given that

Mass,m=148 g

Length,L=13 cm

Velocity,u'(0)=10 cm/s

We have to find the position u of the mass at any time t

We know that

\omega_0=\sqrt{\frac{g}{L}}\\\\=\sqrt{\frac{980}{13}}\\\\=8.68 rad/s

Where g=980 cm/s^2

u(t)=Acos8.68 t+Bsin 8.68t

u(0)=0

Substitute the value

A=0\\u'(t)=-8.68Asin8.68t+8.68 Bcos8.86 t

Substitute u'(0)=10

8.68B=10

B=\frac{10}{8.68}=1.15

Substitute the values

u(t)=1.15 \sin (8.68t)cm

Period =T = 2π/8.68

After half period

π/8.68 it returns to equilibruim

π/8.68 = 0.3619sec

6 0
3 years ago
Increasing the two objects will cause the gravitational force between the objects to decrease.
ELEN [110]
This statement is false. Increasing the two objects' mass (I'm guessing) will actually increase their gravitational force. This is because of the equation:

F_g =  \frac{Gm_1m_2}{d^2}

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Answer:

True

Explanation:

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dedylja [7]

Answer:

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is

Here  is mass of water being heated,  specific heat of water and  change in temperature.

Here .

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Explanation:

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