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sladkih [1.3K]
3 years ago
7

The brain is not a muscle, like the heart, that can be worked and built. Which BEST explains why a consistent exercise regime ha

s a positive
impact on the brain?
ОА. .
Exercise generally requires a lot of thinking.
ОВ.
Exercise can eliminate all of the impact of stress.
OC.
Exercise helps maintain and create pathways in the brain.
OD.
Exercise is the only way to moderate the hormones that control the brain.
Physics
1 answer:
Anna007 [38]3 years ago
4 0

Answer:

Explanation:

D

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A bike travels at a constant speed for 4.00 m/s for 5.00 seconds. How far does it go
Umnica [9.8K]

Answer:

20 m

Explanation:

4.00 m/s x 5 seconds

4 m/s x 5 s = 20m

7 0
3 years ago
Read 2 more answers
An 800 N man stands on a scale in a motionless elevator. When the elevator begins to move, the scale
DENIUS [597]

Answer:

Net force = 800 – 650

= 150 N

150 = (800 ÷ 9.8) a  

a = 1470 ÷ 800

= 1.8375 m/s^2, downwards

3 0
3 years ago
The flash unit in a camera uses a special circuit to "step up" the 3.0 V from the batteries to 360 V , which charges a capacitor
aksik [14]

Answer:

The capacitance of the capacitor is 1.85*10^{-5}F

Explanation:

To solve this exercise it is necessary to apply the concepts related to Power and energy stored in a capacitor.

By definition we know that power is represented as

P = \frac{E}{t}

Where,

E= Energy

t = time

Solving to find the Energy we have,

E = P*t

Our values are:

P = 1*10^5W

t = 12*10^{-6}s

Then,

E= (1*10^5)(12*10^{-6})

E = 1.2J

With the energy found we can know calculate the Capacitance in a capacitor through the energy for capacitor equation, that is

E=\frac{1}{2}CV^2

Solving for C=

C = \frac{1}{2}\frac{E}{V^2}

C = 2\frac{1.2}{(360^2-3^2)}

C = 1.85*10^{-5}F

Therefore the capacitance of the capacitor is 1.85*10^{-5}F

7 0
3 years ago
An airplane is at rest on a runway. It accelerates at 10 m/s2 for 15 seconds. How fast is it now traveling?​
KATRIN_1 [288]

Answer:

150

Explanation:

v = at

v = 10(15)

v = 150 m/s

6 0
3 years ago
What does it mean to control variables
olga55 [171]
Controlled variables are influences that could affect the outcome of an experiment, and so are purposely controlled so that they do not impact the experimental results.
3 0
3 years ago
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