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4 years ago

Low pH means that the hydrogen-ion concentration is __________. A. equal to the pH number B. low C. high D. in the middle

Physics

1 answer:

lys-0071 [83]4 years ago

7 0

Low pH means a the solution is acidic, which means the answer is C. it has a high hydrogen-ion concentration

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Please help on this one?

navik [9.2K]

the upside down image means an inverted image and for an inverted image, magnification is negative

so the answer is -m

4 0

4 years ago

The oven draws 1100 W of power, and you have determined that it heats with an efficiency of 51%. Using this information, determi

LiRa [457]

Answer:

134.75935 seconds

Explanation:

m = Amount of water = 240 mL

c = Specific heat of water = 4.2 J/mL °C

$\Delta T$ = Change in temperature = $100-25=75$

t = Time taken

P = Power = 1100 W

E = Pt

Efficiency = 51 %

So, Energy = 0.51Pt

As energy is conserved

Q = 0

$\\\Rightarrow -mc\Delta T+E=0\\\Rightarrow -mc\Delta T+Pt=0\\\Rightarrow -240\times 4.2(100-25)+0.51\times 1100t=0\\\Rightarrow t=\frac{240\times 4.2(100-25)}{0.51\times 1100}\\\Rightarrow t=134.75935\ s$

The it takes to raise the temperature is 134.75935 seconds

6 0

4 years ago

What is your average velocity after going 15 meters east followed by 20 meters

adelina 88 [10]

Answer:

0.5 m/s

Explanation:

Velocity = displacement/time taken

going 15 meters east and then 20 meters west gives a displacement of 5 meters.

Velocity v = 5/10

= 0.5 m/s

7 0

3 years ago

What is missing from this graph?<br><br> (A) A title.<br> (B) Axis labels.<br> (C) A trendline.

SIZIF [17.4K]

Axis labels. We don’t know what is being compared with the data

5 0

3 years ago

Read 2 more answers

What are the four types of musical instruments and what are the physical behind each type of musical instrument

pishuonlain [190]

Answer:

The four types of musical instruments are percussion, woodwind, brass, and strings.

Explanation:

Percussion instruments include drums, triangle, cymbals, and xylophones. There are more instruments than what i've mentioned though. Percussion instruments often produce the beat of songs.

Woodwind instruments include clarinets, oboe, flute, and saxophone. Woodwind instruments often produce the harmony of songs and, occasionally, the melody.

Brass instruments include trumpet, trombone, french horn, and tuba. Brass instruments often produce the harmony of songs, the trumpet produces the melody a lot though.

String instruments include guitars, violins, cello, bass, ukulele, and banjo. String instruments produce both the harmony and the melody. These instruments often produce really beautiful music, in my opinion.

8 0

3 years ago