I need help with science

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Answer 1

Answer:

Answer:

saaaaame

Explanation:

Related Questions

At 400 K, a volume of gas has a pressure of 0.40 atmospheres. What is the pressure of this gas at 273 K?
Electrons are added into the outermost what in groups 1 & 2
A bookshelf is 2m long, with supports at its end (p and q). A book weighing 10N is placed in the middle of the shelf. what are the upward forces acting on p and q. if the book is moved 50 cm from q, what are the forces at p and q now?
Personification means to give human characteristics to animals, ideas, and objects. a. Trueb. False
if a bus has a mass of 5000 kg and a velocity of 10 m/s, what must the velocity of a 1500 kg can be to have the same momentum

Suppose that you're facing a straight current-carrying conductor, and the current is flowing toward you.The lines of magnetic force at any point in the magnetic field will act in
A. the same direction as the current.
B. a clockwise direction.
C. a counterclockwise direction.
D. the direction opposite to the current.

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Right-hand rule reveals a connection between the current and the magnetic field lines in the magnetic field. It is also called Ampere`s right hand screw rule. It determines the direction of the magnetic field surrounding a current carrying wire. The thunb points direction of current and fingers point the direction of magnetic lines of force. Answer: C ) a counterclockwise rotation.

Answer: b. a clockwise direction

Explanation: just took the test

Nicolaus Copernicus believed that the: sun revolved around the earth sun was the center of the solar system movement of planets could explain weather stars and planets represented spirits

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Nicolaus Copernicus spearheaded the idea of heliocentrism, that is, that the sun was the center of the solar system. Back in his time, a lot of astronomers and scientists believed that the earth was the center of the solar system. This so called belief was called geocentrism. Nicolaus was one fo the first few who pushed heliocentrism.

Answer:

B. Sun was the center of the solar system.

Mary walked north from her home to Sheila's home, which is 4.0 kilometers away. Then she turned right and walked another 3.0 kilometers to the supermarket, which is 5.0 kilometers from her own home. She walked the total distance in 1.5 hours. What were her average speed and average velocity?

Answers

The answer is speed: 4.7 km/h, velocity: 3.3 km/h.

Distances and time are given:
d1 = 4 km
d2 = 3 km
d3 = 5 km
t = 1.5 h

The speed can be expressed as a distance (d) divided by time (t). The average speed (s) is total distance travelled divided by time:
s = (d1 + d2)/t = (4+3)/1.5 = 7/1.5 = 4.7 km/h

The average velocity (v) is total displacement (d₁) from the starting point divided by time. Since Mary's starting point was home, and she walked to the supermarket, which is 5.0 kilometers from her own home, her displacement is 5 km:
v = d₁/t = 5/1.5 = 3.3 km/h

Answer:

Explanation:

THE EXPERT IS WRONG IT IS

4.6 and 3.3

What roles do exchange particles play in an interaction?

Answers

The exchange particles you are talking about are probably the gauge bosons. They are elementary bosons, meaning that they are elementary particles making part of the standard model and they have integer spin. There are four of them: The photon, the gluon, the W+ and W- bosons and the Z boson. The photon basically is the particle of light being an excitation, if you will, of the electromagnetic field so that is mediates the electromagnetic force. The only thing that differs from long range photons (light) is that they are what is called virtual photons but that is for another subject. Then you have the gluons that come in 8 varieties and their role is to interchange the color charge in between quarks so that it mediates the strong nuclear force, the force that keeps quarks bounded into protons. And then finally there are the W+, W- and Z bosons that mediates this time, the weak nulear force, the force that allows protons to coexist in the nucleus of atoms with neutrons. I hope that helped you, but as i usually do, i tried to simplify my answer beacause i could have written a lot mor about that!

A block of mass m sits at rest on a rough inclined ramp that makes an angle θ with the horizontal. What must be true about force of static friction f on the block?A) f > mg
B) f = mgsin(?)
C) f > mgcos(?)
D) f = mgcos(?)
E) f > mgsin(?)

Answers

When the block is at rest, the static frictional force is equal to the horizontal component of the block's weight (F = mgsin(θ)).

The static frictionalforce on the body at rests is determined by applying Newton's second law of motion.

F = ma

where;

F is applied force on a body
m is the mass of the body
a is the acceleration of the body

If the block is at rest, then the net horizontal force on the block is zero.

$\Sigma F_x = 0\n\nmg sin(\theta ) - F_s = 0\n\nF_s = mg sin(\theta)$

Thus, when the block is at rest, the static frictional force is equal to the horizontal component of the block's weight.

Learn more here:brainly.com/question/13758352

Answer:

Option B

Explanation:

For a system of block on inclined ramp shown in the attached image. From the attached image, the Normal force N, weight mg and frictional force f act on the block. The sum of vertical forces should be zero just as sum of vertical forces should be zero when the system is in equilibrium condition.

Taking sum of forces along the inclined plane we deduce that

[tex]f=mgsin \theta[tex]

Therefore, option B is the correct option.

What is the resistance of an ideal ammeter voltmeter ?

Answers

All the current being measured has to flow through the ammeter. So in order to avoid
any change in the circuit caused by the ammeter, its resistance should ideally be zero.

The voltmeter measures the voltage between two points. It must be connected
between those points, and in parallel with everything between them in the circuit.
In order to avoid any change in the circuit caused by the voltmeter, its resistance
should ideally be infinite.

Final answer:

An ideal ammeter has zero resistance to avoid altering the current it measures, while an ideal voltmeter has infinite resistance to prevent drawing current from the device it's measuring the voltage of.

Explanation:

The resistance of an ideal ammeter is zero ohms. This ensures that it doesn't interfere with the current it is measuring. An ammeter is connected in series with the circuit, and if the resistance were greater than zero, it would decrease the amount of current circulating in the circuit.

On the other hand, an ideal voltmeter has infinite resistance. This happens because a voltmeter is connected in parallel with a device to measure its voltage, and to avoid drawing current from the device, an ideal voltmeter should have infinite resistance.