The north pole of a bar magnet is moved close to the north pole of a second bar magnet. What prediction best describes how the first magnet responds when it is released? It will move toward the second magnet because like poles repel. It will move toward the second magnet because like poles attract. It will move away from the second magnet because like poles repel. It will move away from the second magnet because like poles attract.

Answer:

The answet is B. Hope thia is right! btw this is also my lesson xD

Answer:

a) 8m.[tex]s^{-2}[/tex]

b) 6.4N

Explanation:

a)Using [tex]s=ut+1/2at^{2}[/tex]

s=16

u=0

t=2

a=?

16=1/2a(4)

a=8m.[tex]s^{-2}[/tex]

b) F=ma

Where m is in kg

Convert 800g to kg

800/1000=0.8kg (1000g in a kg)

F= 0.8 x 8 = 6.4N

Answer:

The correct answer is A.

Explanation:

Answer:

A. A lower voltage into a higher voltage

Explanation:

A P E X

Explanation:

a fraction that is created when we slide something in a motion

Answer:

t = 9.36 s

Explanation:

Given that,

Initial velocity, u = 0 (at rest)

Final velocity, v = 77 m/s

Acceleration of the airplane, a = 8.2 m/s²

We need to find the time required for an airplane to take off its speed 77 m/s. Let t be the time. using first equation of motion to find it as follows :

v=u+at

[tex]t=\dfrac{v-u}{a}\\\\t=\dfrac{77}{8.22}\\\\t=9.36\ s[/tex]

so, the airplane will take 9.36 seconds.

Answer:68

Explanation:

6.8x100

We have that for the Question "A block weighing (Fg) 100 N is resting on a steel table (us = 0.68) ." it can be said that

The minimum force to start this block moving is [tex]F_{min}=37N[/tex]

From the question we are told

A block weighing (Fg) 100 N is resting on a steel table (us = 0.68)

The minimum force to start this block moving is. N.

Generally the equation for the Maximum force  is mathematically given as

[tex]F_{max} =0.74*50\\\\F_{max} =37N[/tex]

Therefore

The Minimum force = max Frictional force

Therefore

[tex]F_{min}=37N[/tex]

Hence

The minimum force to start this block moving is [tex]F_{min}=37N[/tex]

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Answer:

conduction

Explanation:

Answer:

Radiation

Explanation:

Conduction: movement of something such as heat or electricity through a medium

Convection: movement in a gas or liquid in which the warmer parts move up and the cooler parts move down

Radiation: emission or transmission of energy in the form of waves or particles through space or through a material

Explanation:

ANSWER

g

m

=

R

2

GM

1.4=

R

2

(6.667×10

−11

)(7.34×10

22

)

R=

1.4

6.667×10

−11

(7.34×10

22

)

=

34.95×10

11

=1.87×10

6

m

HOPE IT'S HELP AND PLZ FOLLOW ME

Answer:

items that would sink : spoon marbles rocks

Explanation:

items that would float : straw feather cotton

Answer:

250 m

Explanation:

In projectile, range is given as;

R = (v²sin 2θ)/g

We are given θ = 45°

Thus range of shell is;

R = (v²sin (2 × 45))/g

R = v²/g

Now, distance for the shell to hit the car will be; 150 + 14.14t

This will be equal to the range of shell;

150 + 14.14t = v²/g

Where t is time of flight

Now, time of flight is given by;

t = (2vsin θ)/g

t = (2v sin 45)/g

In surf form, we have;

t = (2v/(g√2))

Simplifying further gives;

t = (v√2)/g

Plugging this value of t into the distance equation gives;

150 + 14.14(v√2)/g = v²/g

Assuming g is 10 m/s², we have;

150 + 14.14(v√2)/10 = v²/10

Multiply through by 10 to get;

1500 + 14.14(v√2) = v²

v² - 20v - 1500 = 0

From quadratic equation calculator, we have; v = 50 m/s

Thus, t = (50√2)/g

t = (50√2)/10

t = 5√2

Plugging this into the distance equation gives;

Distance = 150 + 14.14(5√2) = 250 m

Answer:

Explanation:

To the atomic mass;

1.   Atomic mass is the number of protons + neutrons;

  When a new proton is added, the atomic mass increases.

   When a proton is removed, the atomic mass reduces

The mass of an atom is concentrated in the nucleus where there is the proton and neutron.

2. Atomic number is the number of protons:

When a new proton is added, the atomic number increases

When a new proton is removed, the atomic number reduces

3. Charge:

 An atom is neutral if the number of positive charges is the same as negative charges:

    Protons = electrons

If :

   Protons > electrons = +Ve charges

   Protons < electrons =  -Ve charges

Answer:

584.32m

Explanation:

Firstly, we need to find the x and y components of each vector.

x-component for vector L=303cos205°=-274.61

y-component for vector L=303sin205°=-128.05

x-component for vector M=555cos105°=-143.64

y-component for vector M=555sin105°=536.09

Since it's the vector sum, we add the x and y components of each vector.

Resultant vector x-component -274.61+(-143.64)=-418.25

Resultant vector y-component -128.05+536.09=408.04

Now, to find the magnitude, we use the formula [tex]\sqrt{x^{2}+y^{2}}[/tex]

sqrt(-418.25^2+408.04^2)=584.32m

Check my work for errors just in case.

Answer:

D) 100 kilometres/hour.

Explanation :

Given -

To find -

Solution -

★ Velocity = displacement/time

→ V = 200/2

→ v = 100 km/h

Therefore, the average velocity of the car is 100 km/h.

Answer:

w=225000 J

E=225000 J

P=9000 W

P=22500 W

Explanation:

Ew=Fd=E

P=E/t

(A) w=225000 J

(B) E=225000 J

(C) P=9000 W

(D) P=22500 W

Aristotle famously described a force as anything that generates an object to undergo “unnatural motion. Sir Isaac Newton was one of the preferred scientists to explore gravity and force. Any kind of force is simply a push or a pull. It can be described as a push or pull on an object.

Thus, Ew=Fd=E (P=E/t)

Force can assemble a body that is at rest to move.

It can contain a moving body or slow it down.

It can accelerate the acceleration of a moving body.

It can also modify the direction of a moving body along with its build and size.

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Answer:

True

Explanation:

Answer: 6.0 m/s2

Explanation:

The acceleration of the block pushed horizontally with the force of 6 N is 3 m/s².

In order to move a body of mass 'm' kg with an acceleration of 'a' m/s², a force of magnitude → |F| = ma is needed to push the body in a specified direction.

Given is a 2 kg block being moved across a frictionless horizontal surface by a 6 Newton horizontal force.

Mass of block [m] = 2 Kg

Force on block [F] = 6 N

From the definition of force -

|F| = ma

6 = 2 x a

6 = 2a

a = 3 m/s²

Therefore, the acceleration of the block pushed horizontally with the force of 6 N is 3 m/s².

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Answer:

Either A or D

Explanation:

Answer:

c

Explanation:

its c because high winds foRM A HURRICAN AND WARM TO AND ESPECIALY IF IT IS 80 DEGRESES

Answer:

objects falling at same rate.

Explanation:

ifif you neglect air resistance, objects following your Earth's surface or with the same approximate acceleration 9.8 meters per second squared (9.8 m/s^2, or g) due to Earth's gravity.

Answer:

answer down below

Explanation:

hi! newton's third law applies to a lot of things. this is shown when we jump, bounce a ball, or push something, for example. the law states that for every action, there an equal and opposite reaction. when you bounce a ball, it bounces back up at the same force at which you dropped it.

hope this helps!

Answer:

add 5 each number

Answer:

Increase by 5 each time.

Explanation:

Large scale extraction is vital to the economy of mining towns is the correct option.

Large scale extraction is very important to the economy of mining towns because the minerals are very valuable which can be sold at high prices which leads to increase in income of a country but this large extraction also disturbs the surrounding environment.

So we can conclude that Large scale extraction is vital to the economy of mining towns is the right option.

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Answer:

Large scale extraction is vital to the economy of mining towns is right

Explanation:

Answer:

47.4 ft/s

Explanation:

Using v² = u² - 2gs where u = initial vertical velocity of ball = 100sin30, v = final vertical velocity of ball at the time it was caught by the fielder, g = acceleration due to gravity = 32 ft/s² and s = vertical displacement = y₂ - y₁, y₁ = 3 ft and y₂ = 7 ft. s = y₂ - y₁ = 7 - 3 = 4 ft

Substituting these values into the equation, we have

v² = u² - 2gs

v² = (100sin30)² - 2 × 32ft/s² × 4 ft

v² = (100sin30 ft/s)² - 256 ft²/s²

v² = (50 ft/s)² - 256 ft²/s²

v² = 2500 ft²/s² - 256 ft²/s²

v² = 2244 ft²/s²

v = √2244 ft²/s²

v = 47.37 ft/s

v ≅ 47.4 ft/s

So, the velocity of the ball relative to the fielder at the instant the catch is made is 47.4 ft/s.

Answer:

Ek =  981000 [J]

Explanation:

To solve this problem we must use the principle of energy conservation, where kinetic energy is transformed into potential energy or vice versa. In this special case we take the reference level of potential energy in the soil (potential energy equivalent to zero). When the potential energy is zero, this energy has been transformed into kinetic energy and the velocity will be maximum.

[tex]E_{k} =\frac{1}{2}*m*v^{2}[/tex]

[tex]E_{p}=m*g*h[/tex]

where:

Ek = kinetic energy [J]

Ep = potential energy [J]

m = mass = 200 [kg]

h = elevation = 500 [m]

[tex]E_{p}= E_{k}[/tex] (energy conservation)

Ep = 200*9.81*500

Ep = 981000 [J]

And the kinetic energy is equal to:

Ek = Ep =  981000 [J]

Answer:

the first one

Explanation:

an atoms ability to attract other electrons and form a chemical bond

since other one got deleted :(

Electronegativity is an atom's ability to attract other electrons and form a chemical bond.

The tendency of an atom of a given chemical element to attract shared electrons (or electron density) when forming a chemical bond is known as electronegativity.

The electronegativity of an atom is affected by its atomic number as well as the distance between its valence electrons and the charged nucleus. The higher the associated electronegativity, the more an atom or substituent group attracts electrons.

Electronegativity is a simple way to quantify bond energy as well as the sign and magnitude of a bond's chemical polarity, which characterizes a bond along a continuous scale from covalent to ionic bonding.

Hence, electronegativity is an atom's ability to attract other electrons and form a chemical bond.

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Answer:

The resolution is when Jonathan finds a new friend in his neighbor after his other one moves away. (B).

Explanation:

Hope this helps

Answer:  Temperature is also a condition that affects the speed of sound. Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly. The speed of sound in room temperature air is 346 meters per second.

Explanation: so basically, yes!

Answer:

The option your looking for is C- Mars and Venus have similar atmospheres

Answer:

C: Mars and Venus have similar atmospheres.