Potassium is a crucial element for the healthy operation of the human

A permanent magnet is placed near a bar of soft iron PQ what will happen

boyakko [2]

Answer:

it will rust

Explanation:

hope it helps

4 0

3 years ago

A boat moves through the water with two forces acting on it. One is a 2000 N forward push by the water on the propeller, and the

jekas [21]

Answer:

a). a=0.2 $\frac{m}{s^{2} }$

b). x=10m

c). v=2 $\frac{m}{s}$

Explanation:

Force forward push = 2000N

Resistive force due water=1800N

Net force=2000N-1800N

Fn=200N

m=1000kg

t=10sec

a).

$F_{n} =m*a\\a=\frac{F_{n}}{m}\\ a=\frac{200N}{1000kg}\\ a=0.2 \frac{m}{s^{2} }$

b).

$x_{f}=x_{o}+ v_{o}*t+\frac{1}{2}*a*t^{2}\\x_{o}=0\\v_{o}=0\\x_{f}=\frac{1}{2}*a*t^{2}\\x_{f}=\frac{1}{2}*0.2*(10)^{2} \\x_{f}=10m$

c).

$v_{f}=v_{o}+a*t\\v_{o}=0\\v_{f}=a*t\\v_{f}=0.2\frac{m}{s^{2} }*10s\\v_{f}=2\frac{m}{s}$

3 0

3 years ago

Which of the following are true? Select all that apply. The net electric field at any location inside a block of copper is zero

Agata [3.3K]

Answer:

1) The net electric field at any location inside a block of copper is zero if the copper block is in equilibrium.

2) In equilibrium, there is no net flow of mobile charged particles inside a conductor.

3) If the net electric field at a particular location inside a piece of metal is not zero, the metal is not in equilibrium.

Explanation:

1) and 3) A block of copper is a conductor. The charged particles on a conductor in equilibrium are at rest, so the intensity of the electric field at all interior points of the conductor is zero, otherwise, the charges would move resulting in an electric current.

2) The charged particles on a conductor in equilibrium are at rest.

6 0

3 years ago

What is called as ionisation energy?

11Alexandr11 [23.1K]

Answer:

<h2>In physics and chemistry, ionization energy or ionisation energy is the minimum amount of energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule. It is quantitatively expressed as </h2><h2>X(g) + energy ⟶ X+(g) + e−</h2>

<h3>Hope it helps you Sharon (Rawrr) </h3>

5 0

3 years ago

V. Lighting is seen 3 seconds before a thunder. How far away has the thunder taken place? Take

spayn [35]

1020m

Explanation:

Given parameters:

Time = 3 seconds

Velocity of sound = 340m/s

Unknown:

Distance of the lightning = ?

Solution:

Velocity is the rate of change of displacement with time. From the given parameters, we can solve for the distance;

Velocity of sound = $\frac{distance of sound}{time taken}$

Distance of sound = velocity of sound x time

Distance of sound = 340 x 3 = 1020m

Learn more:

Velocity brainly.com/question/5248528

#learnwithBrainly

7 0

3 years ago