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3 years ago

A technique called _____ records the brain's activity through scalp electrodes.

Physics

2 answers:

Hitman42 [59]3 years ago

8 0

I think its E E G but not sure what that stands for exactly.

Oh its Electroencephalogram.

sweet [91]3 years ago

4 0

Electoral stimulation neruron

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A parachutist relies on air resistance (mainly on her parachute) to decrease her downward velocity. She and her parachute have a

wlad13 [49]

The resultant force will be equal to difference of her downward force, her weight, and the upward force, the air resistance.
Fnet = 657 - 51.1 x 9.81
= 149.7 N
F = ma
a = F / m
a = 149.7/51.1
a = 2.93 m/s²

3 0

4 years ago

It is difficult to lift a Large stone but easy to lift a smaller one on the surface of the earth .why ?

denis23 [38]

Answer:

the weight of the large stone is greater than a small one

Explanation:

because the large stone has greater mass then the small stone.therefore it is difficult to lift the large stone on the surface of the earth but easy to lift the small one

8 0

3 years ago

Why do we use a spaceship in outer space, far from other objects, to illustrate the principle that an object that does not inter

HACTEHA [7]

Complete Question: Why do we use a spaceship in outer space, far from other objects, to illustrate the principle that an object that does not interact with anything travels at constant speed in a straight line (Newton's first law)? Why not a car or a train? (Select all that apply.)

(1) A car or train touches other objects, and interacts with them.

(2) A car or train can't travel fast enough.

(3) The spaceship has negligible interactions with other objects.

(4) A car or train interacts gravitationally with the Earth.

(5) A spaceship can never experience a gravitational force.

Answer:

(1), (3), (4), (5)

Explanation:

In order to be able to move in a straight line at constant speed forever, as stated by Newton's first law, the object can't be subject to any external net force that can change its momentum.

1) A car, or train, interacts with other objects (the air, the road surface, or the rails, for instance) which means that sooner or later, it will come to an stop, so, for this reason, is not a good fit for that purpose.

3) As it is assumed that the spaceship has negligible interactions with another objects, it will continue moving in a straight line at a constant speed, forever, so it's a good fit to explain Newton's first law.

4) As the train, or a car, or any earthling object, is subject to the gravitational attractive force from Earth, it is not possible for them to move along a straight line at a constant speed forever, as stated by Newton's first law, so a train or a car definitely aren't a good fit in order to explain it.

5) Even though a spaceship can actually experiment a gravitational force from any mass close enough to it, as stated by Newton's Universal Law of Gravitation, in order to simplify things, in this case, usually we neglect any of them.

3 0

3 years ago

Force F acts between two charges, q1 and q2, separated by a distance d. If q1 is increased to twice its original value and the d

Step2247 [10]

Okay, haven't done physics in years, let's see if I remember this.

So Coulomb's Law states that $F = k \frac{Q_1Q_2}{d^2}$ so if we double the charge on $Q_1$ and double the distance to $(2d)$ we plug these into the equation to find

<span> $F_{new} = k \frac{2Q_1Q_2}{(2d)^2}=k \frac{2Q_1Q_2}{4d^2} = \frac{2}{4} \cdot k \frac{Q_1Q_2}{d^2} = \frac{1}{2} \cdot F_{old}$ </span>

So we see the new force is exactly 1/2 of the old force so your answer should be $\frac{1}{2}F$ if I can remember my physics correctly.

9 0

4 years ago

Read 2 more answers

Lewis base A. Provides H in water Bronsted-Lowry acid B. Provides OH - in water Arrhenius base C. Proton donor D. Proton accepto

allsm [11]

Answer: E. Electron pair donor

Explanation:

According to Arrhenius concept, a base is defined as a substance which donates hydroxide ions $(OH^-)$ when dissolved in water and an acid is defined as a substance which donates hydronium ions $(H_3O^+)$ in water.

According to the Bronsted Lowry conjugate acid-base theory, an acid is defined as a substance which donates protons and a base is defined as a substance which accepts protons.

According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs.

Hence, the correct statement is Lewis base is Electron pair donor.

5 0

4 years ago