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3 years ago

Define acid and base in terms of pH in a paragraph

Physics

1 answer:

BigorU [14]3 years ago

7 0

Answer:

Acid is any substance from 0-6

(stomach acid, lemon juice, vinegar, milk, soda, rainwater)

Bases are any substance from 8-14

(egg whites, baking soda, ammonia)

Neutral are 7

(pure water)

Explanation:

* Acids taste sour, are corrosive to metals, change litmus (a dye extracted from lichens) red, and become less acidic when mixed with bases.

* Bases feel slippery, change litmus blue, and become less basic when mixed with acids.

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2 years ago

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3 years ago

What is 13% less of 14 400

GREYUIT [131]

♥ 13%=0.13
14400-0.13
Solve: 14399.87
Answer: <span>14399.87</span>

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3 years ago

A car is traveling 50mph how long will it take the car to travel 300 miles

baherus [9]

50 mph = 50 miles in one hour
300 divided by 50 = 6 hours

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3 years ago

Suppose you are helping Galileo measure the acceleration due to gravity by dropping a canon ball from the tower of Pisa, You mea

Anni [7]

It is given that the height of the tower is

$h=183 ft.$

The uncertainty the measurement of this height is

$\Delta h=0.2 ft$

Drop time is measured as:

$t=3.5s$

The uncertainty in measurement of time is:

$\Delta t=0.5 s$

Using the equation of motion: $h=ut+\frac{1}{2} at^2$ where, $h$ is the distance covered, $u$ is the initial velocity, $a$ is the acceleration and $t$ is the time.

$u=0$ (because canon ball is in free fall). we need to calculate the value of a=g.

$\Rightarrow h=\frac{1}{2}gt^2$

$\Rightarrow g=\frac{2h}{t^2}\\ \Rightarrow g=\frac{2\times 183ft}{(3.5s)^2}=29.87 ft/s^2$

The uncertainty in this value is given by:

$\Delta g=g\sqrt{(\frac{\Delta h}{h})^2+(\frac{2\Delta t}{t})^2}$

Substitute the values:

$\Delta g=29.87\sqrt{(\frac{0.2 }{183})^2+(\frac{2\times 0.5}{3.5})^2}=29.87\sqrt{1.19\times 10^{-6}+0.08}=29.87\times \sqrt{0.08}=29.87\times 0.28=8.44 ft/s^2$

5 0

3 years ago