Like magnetic poles will repel each other, while opposite magnetic poles will attract each other true or false

Answers

Answer 1

Answer: The answer is True because Magnetic poles act like charges, they attract oppisites and repel

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Acid mine drainage is: pollution caused when water, wind or ice erodes the overburden forming erosion drainage channels. dissolved toxic materials wash from mines into nearby lakes and streams. a buildup of residual acidity in soils destroys large areas of vegetation. the acidity of metals in mines exceeds level 9 on the pH scale.

A graph of the motion of a pendulum shows that it swings from +5 centimeters to -5 centimeters for each cycle. What is the amplitude of the pendulum?

Answers

The amplitude of the pendulum is 5cm.

What is the amplitude?

Amplitude is the maximum displacement of the wave from its mean position upwards or downwards.

As the graph of the motion of pendulum swings from +5cm to -5cm for each cycle, the magnitude of peak amplitude of the pendulum is 5 centimeters.

Learn about amplitude.

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the peak amplitude of the pendulum is 5 centimeters, the peak to peak amplitude of the pendulum is 10 centimeters.

in this case, i think peak to peak amplitude makes more sense

If an object weighing 32lbs is acted upon by a net force of 32 lbs, what will be its acceleration?

Answers

That"s exactly the situation when you drop the object off the roof or out of a tree... then the net force on it is the ONLY force on it, I.e. the force of gravity, and its acceleration is the acceleration due to gravity ... 32 ft/sec^2 .

the acceleration would be 0 because lifting force up Is the same as the gravity going down. And therefore will not accelerate. The object has no net force

What is the minimum total energy released whenan electron and its antiparticle (positron)
annihilate each other?
(1) 1.64 × 10^–13 J (3) 5.47 × 10^–22 J
(2) 8.20 × 10^–14 J (4) 2.73 × 10^–22 J

Answers

Answer:

(1) $1.64 * 10^(-13) J$

Explanation:

Energy released in this process is given by

$Q = \Delta m c^2$

here we have

$\Delta m = 9.1 * 10^(-31) kg$

since here mass of two electrons converted into energy so we have

$Q = 2(9.1 /times 10^(-31))(3* 10^8)^2$

$Q = 1.64 * 10^(-13) J$

so here energy released is the energy of rest mass energy due to two charges i.e. electrons and positrons

The minimum total energy released when an electron and its antiparticle (positron) annihilate each other is 1.64 x 10⁻¹³ J.

What is the minimum total energy released?

The minimum total energy released when an electron and its antiparticle (positron) annihilate each other is calculated as follows;

E = Δmc²

where;

m is the mass of the two electrons
c is speed of light

E = (2 x 9.11 x 10⁻³¹) x (3 x 10⁸)²

E = 1.64 x 10⁻¹³ J

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1. A player kicks a football from ground level with an initial velocity of 22m/s, 35° above the horizontal. Assume that air resistance is negligible. Find the ball’s hang time.a. Find the maximum height of the ball in question 2.

b. Find the ball’s range from question 2.

Answers

Answer:

2.57 s

8.12 m

46.4 m

Explanation:

1. In the y direction:

s = 0 m

u = 22 sin 35° m/s = 12.6 m/s

a = -9.8 m/s²

Find: t

s = ut + ½ at²

0 = (12.6) t + ½ (-9.8) t²

t = 2.57 s

2. In the y direction:

u = 12.6 m/s

v = 0 m/s

a = -9.8 m/s²

Find: s

v² = u² + 2as

0² = (12.6)² + 2 (-9.8) s

s = 8.12 m

3. In the x direction:

u = 22 cos 35° m/s = 18.0 m/s

a = 0 m/s²

t = 2.57 s

Find: s

s = ut + ½ at²

s = (18.0) (2.57) + ½ (0) (2.57)²

s = 46.4 m

What term describes the rate at which charge passes a point in a circuit

Answers

Current - APEX :) lol it said my answer wasn't long enough so yeah Hi

That's electric "current", usually described in 'Amperes'.

1 Ampere = 1 Coulomb per second ... "the rate at which
charge passes a point in the circuit".

Bonito has potential energy while he was in the starting blocks, getting ready to run his 5-kilometer race. Which of the following statements are true about his potential energy? Choose the three statements that apply.