All categories

3 years ago

What the Ph measures??

1 answer:

5 0

PH measures the concentration of hydrogen ions ( $H^{+}$ ) in a solution. Knowing this, you can determine how acidic -or basic- your solution is.

You might be interested in

When a cup is placed on a table, which force prevents the cup from falling to the ground?

pshichka [43]

I believe it is normal force.

5 0

3 years ago

Read 2 more answers

What is the differ of fermentation from respirstion

Andrej [43]

This may help u... :P

8 0

3 years ago

If a crow flies west for 60 km and then south for 45 km, what is the direction of its displacement?

son4ous [18]

That's 105 km that he flew, or 65.2 miles ! I'm absolutely positive
that the crow must have landed and gotten some rest when you
weren't looking. But that had no effect on his displacement when
he got where he was going, so we can continue to solve the problem:

The displacement is the distance and direction from the place
where the crow took off to the place where he landed.

-- It's distance is the hypotenuse of the right triangle whose legs
are 60 km and 45 km.

D² = (60 km)² + (45 km)²

=    3,600 km² + 2,025 km² = 5,625 km²

   D = √(5625 km²) = 75 km .

-- It's direction is the angle whose tangent is (45 S / 60 W).

   tan⁻¹ (45/60) = tan⁻¹ (0.75) = 36.9° south of west

   = 53.1° west of south.

   = not exactly southwest but close.

7 0

3 years ago

An open diving chamber rests on the ocean floor at a water depth of 60 meter. Find the air pressure (gage pressure relative to t

Fofino [41]

Answer:

Gauge Pressure required = 606.258 kPa

Explanation:

Water will not enter the chamber if the pressure of air in it equals that of the water which tries to enter it.

Thus at a depth of 60m we have pressure of water equals

$P(z)=P_{0}+\rho _wgh$

Now the gauge pressure is given by

$P(z)-P_{0}=\rho _wgh$

Applying values we get

$P(z)-P_{0}=\rho _wgh\\\\P_{gauge}=1.03\times 1000\times 9.81\times 60Pa\\\\P_{gauge}=606258Pascals\\\\P_{gauge}=606.258kPa$

8 0

3 years ago

Choose all correct sentences Group of answer choices The power is maximum when the value of the impedance is greater than the va

Illusion [34]

Answer:

True b and c

Explanation:

In an RLC circuit the impedance is

$Z = \sqrt{[R^{2} + ( (wL)^{2} + (\frac{1}{wC})^{2} ] }$

examine the different phrases..

a) False. The maximum impedance is the value of the resistance

b) True. Resonance occurs when

(wL)² + (1 / wC)² = 0

w² = 1 / LC

c) True. In resonance the impedance is the resistive part and the power is maximum

d) False. In resonance the inductive and capacitive part cancel each other out

e) False. The impedance is always greater outside of resonance, but at the resonance point they are equal

6 0

2 years ago