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3 years ago

Proper nutrition improves a person's mental alertness. True or False?

2 answers:

5 0

Proper nutrition does improve the mental alertness of a person. If you have a diet that is high in sugar, you will lack focus and clarity. A healthy diet makes your mind clearer. You will be able to focus better and you will feel better with proper nutrition.

nasty-shy [4]3 years ago

5 0

It's true, yesssssssss

You might be interested in

if a mass on a spring bobs up nad down completing 2 full cycles every section. WHat are the periouds and frequency of the mass

Alika [10]

Answer:

This question is incomplete

Explanation:

This question is incomplete because of the absence of the time taken to complete one full cycle.

Frequency (f) will be calculated first as

f = N ÷ t

where N is the number of cycles and t is the time taken to complete one full cycle. The unit for frequency is Hertz (Hz).

To calculate the period, T, the formula below will be used

T = 1 ÷ f

The unit for period is secs

4 0

3 years ago

A boy throws a snowball straight up in the air with an initial speed of 4.50 ft/s from a position 4.00 ft above the ground. The

IgorC [24]

Answer:

a) 0.658 seconds

b) 0.96 inches

Explanation:

$v=u+at\\\Rightarrow 0=4.5-32.1\times t\\\Rightarrow \frac{-4.5}{-32.1}=t\\\Rightarrow t=0.14 \s$

Time taken by the ball to reach the highest point is 0.14 seconds

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=4.5\times 0.14+\frac{1}{2}\times -32.1\times 0.14^2\\\Rightarrow s=0.315\ ft$

The highest point reached by the snowball above its release point is 0.315 ft

Total height the snowball will fall is 4+0.315 = 4.315 ft

$s=ut+\frac{1}{2}at^2\\\Rightarrow 4.315=0t+\frac{1}{2}\times 32.1\times t^2\\\Rightarrow t=\sqrt{\frac{4.315\times 2}{32.1}}\\\Rightarrow t=0.518\ s$

The snowball will reach the bank at 0.14+0.518 = 0.658 seconds after it has been thrown

$v=u+at\\\Rightarrow v=0+32.1\times 0.518\\\Rightarrow v=16.62\ ft/s$

$v^2-u^2=2as\\\Rightarrow s=\frac{v^2-u^2}{2a}\\\Rightarrow s=\frac{0^2-16.62^2}{2\times -100\times 3.28}\\\Rightarrow s=0.42\ ft$

The snowball goes 0.5-0.42 = 0.08 ft = 0.96 inches

8 0

4 years ago

If a nichrome wire has a resistance of 15Ω and is connected across the terminals of a 3.0 V flashlight battery, how much current

scoray [572]

Answer:

0.20 A

Explanation:

The current in the wire is given by Ohm's law:

$I=\frac{V}{R}$

where

I is the current

V is the voltage

R is the resistance

In this problem,

V = 3.0 V is the voltage

$R=15 \Omega$ is the resistance

Substituting into the formula,

$I=\frac{3.0 V}{15 \Omega}=0.20 A$

5 0

3 years ago

The inventor of a new machine claims that its actual mechanical advantage is 4. Literature on the machine reports its input dist

Andreas93 [3]

To solve this we are going to use the formula for ideal mechanical advantage: $IMA= \frac{D_{I} }{D_{O}}$
where
$IMA$ is the machine mechanical advantage
$D_{I}$ is the input distance
$D_{O}$ is the output distance

We know for our problem that $D_{I}=81$ and $D_{O}=27$ . Lets replace those values in our formula to find $IMA$ :
$IMA= \frac{D_{I} }{D_{O}}$
$IMA= \frac{81}{27}$
$IMA=3$

The ideal machine advantage of the machine is 3. The inventor is claiming that the actual mechanical advantage of the machine is 4. Since the actual mechanical advantage takes into account energy losses, it is always less than the ideal mechanical advantage. We can conclude that the developer's claim is false.

8 0

3 years ago

Pick yourself around 1 situation (e.g. pushing a chair on the floor) with four different forces.

aleksandrvk [35]

Should be the force of you pushing the chair, gravity, friction, and air resistance

6 0

3 years ago