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3 years ago

Please help me this is due today

Physics

1 answer:

Alex_Xolod [135]3 years ago

4 0

Answer:

1) Acids have a sour taste.

Acid formulas start with "H", contain hydrogen and some react with active metals in a single replacement reaction to give off hydrogen gas.

An acid will turn blue litmus paper red

All acids are SOLUBLE in water.

Acids have a pH below 7.

2) Bases are bitter to taste a bitter taste is characteristic of all bases.

trong bases are very corrosive and can burn the skin.

Bases may or may not be soluble in water Bases that can dissolve in water are called alkalis

They can conduct electricity.

Bases lose their basicity when mixed with acids.

3) i dont know how to do it on here sorry but its self explanitory!!

4) 0-3 strongly

4-6 weakly

7 neutral

8-10 weakly

11-14 strongly

hydrochloric acid

lead acid battery

gastric acid

lemon juice

cola

vinegar

orange juice and apple juice

tomato juice

beer

tea or healthy skin

acid rain

coffee

urine

milk

healthy human saliva

pure water

blood

sea water

hand soap

household ammonia

bleach

house hold lye

Explanation:

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so, the right answer is 3×12 = 36 units.

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Starting from rest, a rocket accelerates at 20 m/s². How far will it travel in the first 4

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Answer:

80m

Explanation:

using

S=ut+1/2at².

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3 years ago

Question 4 (2 points)

d1i1m1o1n [39]

Answer:

t = 1.15 + .713 = 1.863 [s]

Explanation:

To solve this problem we must use the following kinematic equation, but first we identify the initial data.

vo = 7 [m/s]

yo = 4 [m]

g = 9.81[m/s^2]

$v_{f}=v_{o}-g*t\\0 = 7 - (9.81*t)\\7 = 9.81*t\\t = 0.713[s]$

The final velocity happens at the moment when the maximum height is reached, at this point the final speed is zero.

$y=y_{o}+v_{o}*t-0.5*g*t^{2}\\ y = 0+ (7*0.713)-0.5*9.81*(0.713)^{2}\\ y = 2.5[m]$

The total elevation will be 2.5 + 4 = 6.5 [m]

Now using again the total height we can find the final velocity.

$v_{f}^2=v_{o}^2+2*g*y\\v_{f}=\sqrt{2*g*y}\\ v_{f}=\sqrt{2*9.81*6.5}\\ v_{f}=11.3[m/s]$

With this final velocity we cand find the time.

$v_{f}=v_{i}+g*t\\11.3=0+9.81*t\\11.3=9.81*t\\t=1.15[s]$

Now we have to sum the two times, the time it takes to go up and the time it takes to go down.

t = 1.15 + .713 = 1.863 [s]

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3 years ago