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Paha777 [63]
2 years ago
5

How many times more acidic is solution A with a pH of 3.4 than solution B with a pH of 8.4?

Physics
1 answer:
jeka942 years ago
8 0

Answer:

Solution A is 1 x 10⁵ times more acidic than solution B

Explanation:

The pH scale is a logarithmic scale used to express the acidity or basicity of a solution.

The values are written from 1 - 14 with 1 being the most acidic and 14 a basic solution.

Each interval is ten folds more concentrated than the next because it is a logarithmic scale.

 Since the pH of A = 3.4

                  pH of B  = 8.4

 The difference  = 8.4  - 3.4  = 5.0

So, Solution A is 1 x 10⁵ times more acidic than solution B

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A wheel of diameter 8.0 cm has a cord of length 6.0 m wound around its periphery. Starting from rest, the wheel is given a const
MAVERICK [17]

Answer: time t = 10s

Explanation:

Given;

Diameter = 8.0cm = 0.08m

Radius r = diameter/2 = 0.08/2 = 0.04m

Cord length d = 6.0m

Angular acceleration = 3.0rads/s2

Time = t

Converting the angular acceleration to linear acceleration

a = a* × r = 3.0 × 0.04 = 0.12m/s

d = vt + 1/2 (a × t^2)

Initial velocity v = 0, vt = 0 therefore;

d = 1/2 ( a × t^2)

t = √(2d/a)

t = √ [(2× 6)/0.12]

t = 10s

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3 years ago
Liquids with convex meniscus​
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Mercury in a glass tube.

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2 years ago
Kelly's mother is taking her temperature to see if she has a fever. Which unit of measurement could be used to measure Kelly's b
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Answer:

The answer is A.

Explanation:

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7 0
3 years ago
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A weightlifter raises a 200-kg barbell through a height of 2 m in 2.2 s. the average power he develops during the lift is
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Power is calculated as work per unit time, and work in turn is calculated as force multiplied by distance. In this case, the force required is equivalent to the weight of the barbell multiplied by acceleration due to gravity.
P = W/t = Fd/t = mgd/t = (200 kg)(9.81 m/s^2)(2 m)/2.2 s = 1783.64 Watts.
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3 years ago
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A 1500 kg car moving with a speed of 20 m/s collides with a utility pole and is brought to rest in 0.30 s. Find the magnitude of
storchak [24]

Answer:

-100000 N.

Explanation:

Force: This can be defined as the product of the mass of a body and it's acceleration. The S.I unit of Force is Newton(N). The Formula of force is given as,

F = ma ........................... Equation 1

Where F = Average force exerted on the car, m = mass of the car, acceleration of the car, a = acceleration of the car.

a = (v-u)/t..................... Equation 2

Where v = Final velocity, u = Initial velocity, t = time.

Substitute equation 2 into equation 1

F = m(v-u)/t............. Equation 3

Given: m = 1500 kg, u = 20 m/s, v = 0 m/s (brought to rest), t = 0.3 s.

Substitute into equation 3

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F = -100000 N.

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