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3 years ago

________ 8. The pH of a solution is a measure of the concentration of H+ ions in it. TRUE OR FALSE

Physics

1 answer:

Bumek [7]3 years ago

8 0

Answer:

False.

Explanation:

Potential of Hydrogen is the full form of PH.

Potential of Hydrogen tells about the acidity or basicity of the solution.

The pH of a solution is a measure of the concentration of hydrogen ions $(H+)$ ions and hydroxide ions $(OH-)$ in a solution.

So, the given statement is false.

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If our eyes could see a slightly wider region of the electromagnetic spectrum, we would see a fifth line in the Balmer series em

melamori03 [73]

Answer:

λ = 397 nm

Explanation:

given,

Rydberg wavelength equation for Balmer series

$\dfrac{1}{\lambda}=R(\dfrac{1}{n_f^2}-\dfrac{1}{n_i^2})$

R is the Rydberg constant, R = 1.097 x 10⁷ m⁻¹

n_i = initial energy level

n_f = final energy level

where as for Balmer series n_f = 2

n_i = 7

$\dfrac{1}{\lambda}=(1.097\times 10^7)(\dfrac{1}{2^2}-\dfrac{1}{7^2})$

$\dfrac{1}{\lambda}=2.5186\times 10^6$

$\lambda = 3.97\times 10^{-7}$

Hence, the wavelength is equal to λ = 397 nm

8 0

3 years ago

A particular grocery bag can withstand 40 N of tension force before it rips. If a shopper places 3 kg of food in the bag, what i

snow_lady [41]

Answer;

= 13.33 m/s²

Solution;

From the second Newton's law of motion;

F= ma

F is the force = 40 N

M is the mass = 3 kg

a is the acceleration;

40 = 3 × a

a = 40/3

= 13.33 m/s²

Hence; the maximum acceleration the bag can withstand before ripping is 13.33 m/s²

8 0

3 years ago

Read 2 more answers

PLEASE SOMEONE ANSWER THIS

Kitty [74]

Answer:

All of the above.

4 0

3 years ago

Read 2 more answers

An extreme skier, starting from rest, coasts down a mountain slope that makes an angle of 25.0 with the horizontal. The coeffici

uranmaximum [27]

Answer:

V = 10.88 m/s

Explanation:

V_i =initial velocity = 0m/s

a= acceleration= gsinθ- $\mu_k$ cosθ

putting values we get

a= 9.8sin25-0.2cos25= 2.4 m/s^2

v_f= final velocity and d= displacement along the inclined plane = 10.4 m

using the equation

$v^2_f=v^2_i-2as$

$v^2_f=0^2-2(2.4)(10.4)$

v_f= 7.04 m/s

let the speed just before she lands be "V"

using conservation of energy

KE + PE at the edge of cliff = KE at bottom of cliff

(0.5) m V_f^2 + mgh = (0.5) m V^2

V^2 = V_f^2 + 2gh

V^2 = 7.04^2 + 2 x 9.8 x 3.5

V = 10.88 m/s

6 0

4 years ago

What happens to the particles of a liquid when energy is removed from them?

KonstantinChe [14]

Answer:

D: The distance between the particles decreases

Explanation:

Taking away energy slows down molecules, like how you slow down when you are cold (I think)

3 0

4 years ago