why do compass needles around a current carrying wire point in different directions

Explanation:

The density of a solid copper is 8960kg/m^3 while the density of a molten copper is 7900kg/m^3 this is due to the difference in the state of matter, the solid copper is in solid state while the molten copper is in form of a liquid. In the solid copper atoms are tightly pack while they atom are not tightly packed.

Answer:

I believe it is 16

Explanation:

Answer:so add the momentum twice and then the kinetic energy becomes four times

Explanation:This includes to me not the factor but by what factor it’s kenetic energy changes Momentum becomes twice and kinetic energy becomes four times its original value

The velocity vector is always perpendicular to the radius. By radius, I mean the inward centripetal force that pulls the object to continue on its curved path. Without this inward force, the object would continue on a straight path tangential to the curve it was previously on.

Answer:

Centripetal acceleration = 8m/s²

Explanation:

Given the following data;

Radius, r = 50m

Velocity, v = 20m/s

To find centripetal acceleration;

Centripetal acceleration = v²/r

Centripetal acceleration = 20²/50

Centripetal acceleration = 400/50

Centripetal acceleration = 8m/s²

Therefore, the centripetal acceleration of Zach's car is 8 meters per seconds square.

Answer:

c

Explanation:

Answer:C&D

Explanation:

I just did it

Answer:

They are inversely proportional

Explanation:

The force of gravity and the distance between two objects involved are inversely proportional to one another.

According to newton's law of universal gravitation "the force of gravity between two bodies is a product of their masses and inversely proportional to the distances between them".

Answer:

P= 1.04651 g/cm3

Explanation:

Answer:

friction

Explanation:

have you not heard frictional force?

have you ever heard momentum force or acceleration force

hope this helps. if not. please report it and let someone else try it

Answer:

y = 3.26 [m]

Explanation:

In order to solve this problem, we must use the following equation of kinematics.

[tex]v_{f}^{2}= v_{o}^{2}-2*g*y[/tex]

where:

Vf = final velocity = 0

Vo = initial velocity = 8 [m/s]

g = gravity acceleration = 9.81 [m/s²]

y = elevation [m]

Note: The negative sign in the equation above represents that the movement is againts the direction of the gravity acceleration.

Now replacing:

[tex]0=8^{2} -2*9.81*y\\19.62*y=64\\y=3.26 [m][/tex]

it increase it momentum

Explanation:

atommmmmmmmmmmmmmmmmmmmm

Answer:

Microwaves

Radiowaves.

Answer:

radio waves

microwaves

infrared (IR)

visible light

ultraviolet light (UV)

X-rays

gamma rays

Explanation:

these are the electromagnetic spectrum. they are arranged in decreasing wavelength and increasing energy and frequency.

This is an incomplete question, the complete question is given below.

Drag the tiles to the correct boxes to complete the pairs. Not all tiles will be used.  Match the reactants with the products.

copper sulfate + oxygen

copper oxide

zinc sulfate + copper

aluminum chloride + copper

copper + water

copper sulfate + zinc  →

aluminum + copper chloride  →

copper oxide + hydrogen  →

copper + oxygen  →

Answer :

Copper sulfate + Zinc → Zinc sulfate + copper

Aluminium + Copper chloride → Aluminium chloride + copper

Copper oxide + Hydrogen → Copper + Water

Copper + Oxygen → Copper oxide

Explanation :

As we know that chemical reaction is a reaction in which two or more than two substances or reactants are reacted to give two or more than two different products.

According to the question:

This reaction is a single replacement reaction in which zinc is more reactive than copper and zinc displaces copper from its salt to give products.

This reaction is a single replacement reaction in which aluminium is a more reactive element than copper and aluminium displaces copper from its salt to give products.

This reaction is a single replacement reaction in which hydrogen displaces less reactive metals from their oxide to form water and the metal.

This reaction is a synthesis reaction in which two different atoms or molecules combine to form single compound.

Answer:

Copper sulfate + Zinc → Zinc sulfate + copper

Aluminium + Copper chloride → Aluminium chloride + copper

Copper oxide + Hydrogen → Copper + Water

Copper + Oxygen → Copper oxide

Explanation:

guy above me

Explanation:

it's lead because see it's density if u have more density the voice will be slowest

Answer:

11 times

Explanatiom:

756 fourty

Answer:

the form of energy that makes something move

Explanation:

Explanation:

Electromagnetic waves are different from sound or water waves in such a way that water and sound waves are called mechanical waves that requires a material medium for their propagation.

Electromagnetic waves do no require a material medium for propagation.

Answer:

Frequency and tfcvvbyfgffhhi

Answer:

I think frequency

Explanation:

Answer:

It is B

Explanation:

Answer:

the other guy is right im answering so you can give him brainliest have a nice day :)

Explanation:

Answer:

The change in the object's velocity is 6.25 m/s

Explanation:

Force

According to the second Newton's law, the net force exerted by an external agent on an object of mass m is:

F = ma      [1]

Where a is the acceleration of the object.

On the other hand, the equations of the Kinematics describe the motion of the object by the equation:

[tex]v_f=v_o+at\qquad\qquad[2][/tex]

Where:

vf is the final speed

vo is the initial speed

a is the acceleration

t is the time

It's given a constant force of F=4.5 N acts on an object of mass m=7.2 kg. The object has an acceleration we can calculate solving [1] for a:

[tex]a=\frac{F}{m}[/tex]

[tex]a=\frac{4.5}{7.2}=0.625[/tex]

[tex]a=0.625\ m/s^2[/tex]

It's required con compute the change of velocity (or its magnitude, the speed). From [2]:

[tex]v_f-v_o=at[/tex]

The expression at the left side is the change of speed Δv:

[tex]\Delta v=at[/tex]

Knowing the time is t=10 s:

[tex]\Delta v=0.625*10[/tex]

[tex]\Delta v=6.25\ m/s[/tex]

The change in the object's velocity is 6.25 m/s

Answer:

P = 0.2 W

Explanation:

Given that,

Force, F = 4 N

Displacement, d = 1 m (say)

Time, t = 20 s

We need to find the power output. Power is the rate of doing work. So,

P = W/t

[tex]P=\dfrac{Fd}{t}\\\\P=\dfrac{4\times 1}{20}\\\\P=0.2\ W[/tex]

So, the required power is 0.2 W.

Answer:

b) v

Explanation:

the distance between pole and position of image can denoted by v

Answer:

B. an organism being changed through technological methods

Explanation:

Science can be defined as a branch of intellectual and practical study which systematically observe a body of fact in relation to the structure and behavior of non-living and living organisms (animals, plants and humans) in the natural world through experiments. One of the most important branch of science is bioengineering. Bioengineering can be defined as a high-tech process which avail scientists the opportunity or ability to modify, remove, replace and insert Deoxyribonucleic Acid (DNA) sequence in a living organism such as bacterias, animals, plants etc in order to correct a genetic disorder and to improve on their physical and chemical conditions.

Selective breeding has been used to create plants that are more resistant to disease. Thus, this is an example of an organism being changed through technological methods.

Answer:

The answer would be no

Explanation:

because the voltages are so high, we can assume that 5 appliances divided up between the voltages would not be safe to use together and would ultimately cause the circuits to overload

Answer:One of this country's most notable achievements will be spending Canada Day weekend marking its own milestone anniversary in a unique place, floating up in space.

After 10 years in the ether, several times farther from Earth than the International Space Station, it remains the world's smallest space telescope.

MOST was also Canada's first-ever space telescope when it was launched into space on June 30, 2003.

It has helped make Canada a leader in the field of micro satellites.

But Matthews is particularly enthused about all the other possibilities that might be opened up by the 60-kilogram MOST.

The colorful University of British Columbia astrophysicist firmly believes there is life outside our solar system.

"Certainly simple forms of life like microbial life is probably very common — and I hope complex life," Matthews said in a recent interview. "If it's out there, we're finding the places where it's most likely to live."

I have no Idea if this helps but hope it does.

Answer:

no i dont think so

Explanation:

I dont see a mark where it is, if there was a line it would be marking the constant speed of it. There is just time(s) which probably stands for speed, and position(m) which probably stands for miles. There is a measurement of 50, down to 10. Please give me more explanation to this question and I may be able to help!

Answer:

6km

Explanation: