Am I right? Please help!

The nonmetal family of the periodic table that wants to gain, lose, or share four electrons is the __________ family.

vivado [14]

d. halogen is the answer

6 0

3 years ago

A square coil, enclosing an area with sides 2.0 cm long, is wrapped with 2 500 turns of wire. A uniform magnetic field perpendic

Delvig [45]

Answer:

The induced voltage in the coil is 0.25 V.

Explanation:

It is given that,

Area of a square coil is 2 cm or 0.02 m

Number of turns in the wire is 2500

A uniform magnetic field perpendicular to its plane is turned on and increases to 0.25 T during an interval of 1.0 s.

We need to find the induced voltage in the coil. According to Faraday's law, the induced emf in the coil is given by the rate of change on magnetic flux. So,

$\epsilon=\dfrac{-d\phi}{dt}\\\\\epsilon=\dfrac{-d(NBA)}{dt}\\\\\epsilon=NA\dfrac{-dB}{dt}\\\\\epsilon=-2500\times (0.02)^2\times \dfrac{0.25}{1}\\\\\epsilon=-0.25\ V$

So, the induced voltage in the coil is 0.25 V.

3 0

3 years ago

Suppose you are driving a car, and a cup of coffee is on the seat beside you. Choose the frame with respect to which the cup is

Reil [10]

We want to find the frame of reference (viewpoint) where the cup of coffee inside your car moves the fastest.

The correct option will be A, the astronaut in the ISS.

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Let's see how to get the correct option, first, remember that the frame of reference means the "viewpoint" that you are taking. So we need to find the viewpoint where the cup of coffee moves faster.

Now just let's analyze all the given options to see in which one the cup moves fastest.

A) Here the astronaut sees the car moving, so here the cup has the speed of the car, and the astronaut is also moving. Remember that the International Space Station orbits with a speed of 7.6km/s (this is really fast). So in the frame of reference of the astronaut, he/she is at a stop, so this velocity is assigned to all the other objects. Thus, he sees the cup of coffee moving really fast.

B) In it's own frame of reference, the cup does not move.

C) The observer will see the car moving, and the cup is inside the car, so in this frame of reference the velocity of the cup is the same as the one of the car.

D) The incoming car has a given velocity V', from this frame, the car with the cup of coffee will have its own velocity plus the V' of the incoming car, so from this frame the velocity of the cup of coffee is larger than the velocity of the car with the cup.

E) You are driving the car with the cup of coffee, so the cup of coffee is always next to you, so in this frame, the cup does not move.

Concluding, is easy to see that the frame of reference where the cup moves the fastest is in the first one, for the nature of the astronaut's frame of reference velocity, he/she will see the cup moving the fastest.

If you want to learn more, you can read:

brainly.com/question/12222532

8 0

2 years ago

what system helps the body maintain homeostasis by giving it the nutrients it needs to perform different functions

castortr0y [4]

The Cardiovascular system is the system that helps the body maintain homeostasis by giving it the nutrients it needs to perform different functions

6 0

3 years ago

8. Chemical weathering occurs more rapidly in what kind of climates?

Lady bird [3.3K]

I think it's b..................