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3 years ago

Moira is drawing the electric field lines around a pair of charges. One charge is positive, and the other charge is negative.

Physics

2 answers:

Virty [35]3 years ago

6 0

Answer:

option (C)

Explanation:

The path on which an electric charge move in the electric field is called electric field line.

From a positive charge, the electric field line appears to come out and from a negative charge, the electric field line appears to go inside.

Here, one charge is positive and another is negative, so field line is going away from the positive charge and move towards the negative charge.

vampirchik [111]3 years ago

5 0

She should draw the filed lines as such;

C) Away from positive charge and toward the negative charge

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If sound waves require a medium (material) to vibrate in order to produce a sound, can sound waves travel in outer space? Why or

soldier1979 [14.2K]

Sound waves requires a medium (material) to vibrate in order to produce a sound. So sound waves cannot travel in outer space as it is vacuum.

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3 years ago

Determine the initial velocity of the ball if it reaches a height of 15 meters.

jasenka [17]

Answer:

the initial velocity of the ball is 17.14 m/s

Explanation:

Given;

maximum height reached by the ball, h = 15 m

let the initial velocity of the ball = u

at maximum height, the final velocity of the ball is zero, v = 0

The initial velocity of the ball is calculated by using the following upward motion kinematic equation;

v² = u² - 2gh

0 = u² - 2(9.8 x 15)

u² = 294

u = √294

u = 17.14 m/s

Therefore, the initial velocity of the ball is 17.14 m/s

4 0

3 years ago

a block with a mass of 3 kg is swung on a cord in a horizontal circle with a radius of 2m. the speed of the block is 6m/s^. the

Ivenika [448]

Given Information:

Mass = m = 3 kg

Speed = v = 6 m/s

Radius = r = 2 m

Required Information:

Magnitude of the acceleration = a = ?

Answer:

Magnitude of the acceleration = 18 m/s²

Explanation:

The acceleration of the block traveling along a circular path with some velocity is given by

a = v²/r

a = 6²/2

a = 36/2

a = 18 m/s²

Therefore, the magnitude of the acceleration of the block is most nearly equal to 18 m/s².

Bonus:

The corresponding force acting on the block can be found using

F = ma (a = v²/r)

F = mv²/r

7 0

3 years ago

Read 2 more answers

What is the difference between a mixture and a pure substance? Give an example of each.

suter [353]

Answer:

A pure substance (an element or a compound) is made up of only one type of atom, or molecule.

Examples: water (H2O molecules), oxygen (O2 molecules), argon (Ar atoms).

A mixture is made of up of more than one type of atom or molecule.

Examples: salt water (H2O molecules, Na+ ions, Cl- ions),

air (N2 molecules, O2 molecules, Ar atoms, CO2 molecules)

Note: the composition of a pure substance is fixed, but the composition of a mixture can vary. Two salt water solutions might not have the same concentration of salt. Or, if you prefer, one blueberry muffin might have more blueberries in it than another blueberry muffin.

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5 0

4 years ago

A truck drives with a constant linear speed v_iv i v, start subscript, i, end subscript down a road with two curves. The first

Alex

Answer:

Explanation:

Centripetal acceleration is given by

$a = \dfrac{v^2}{r}$