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3 years ago

Read the following passage and find the two errors. Then, choose the answer that

Physics

1 answer:

solmaris [256]3 years ago

6 0

Answer:

O pH is a measure of the concentration of H+ ions in a solution of an acid or base. The pH plots

the concentration of solutions in a range from 0-14.

Explanation:

pH is a measure of how acidic/basic water is. The range goes from 0 to 14, with 7 being neutral.

You might be interested in

What is the single most important factor that determines why Earth (or almost any planet in the Solar System) experiences season

kirill [66]

Answer:

Planetary seasons are caused by two factors:

1. axial tilt and

2. variable distance from the sun

Explanation:

Earth's orbit is nearly circular and so has little effect on climate. It's our planet's axial tilt that causes almost all seasonal changes.

You can read further; Planetary seasons

6 0

3 years ago

A 4 kg billiard ball moving on a horizontal surface has a speed of 16 m/s when it strikes a horizontal coiled spring is brought

ruslelena [56]

Answer:

spring constant of the spring is 1820.44 N/m

Explanation:

given data

ball mass = 4 kg

speed = 16 m/s

distance = 0.75 m

to find out

spring constant of the spring

solution

we know that kinetic energy of ball = energy store in spring as compression

so we can express it as

0.5 × m × v² = 0.5 × k × x² ....................1

so put here value we get spring constant k

m × v² = k × x²

4 × 16² = k × 0.75²

solve it we get

k = 1820.44 N/m

so spring constant of the spring is 1820.44 N/m

6 0

4 years ago

Read 2 more answers

if a ball is thrown horizontally from the first floor of a building (5.0 m from the ground) at a speed of 5.0 m/s, where will it

r-ruslan [8.4K]

The ball will be 49.5m from the base when it hits the ground based on 9.8m/s² earth gravity.

what is earth gravity?
Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun.

Why do things fall down when you throw them or drop them? The answer is because gravity ; an invisible force that pulls objects toward each other. Earth's gravity is what keeps you on the ground and what makes things fall.

First, let's try to find the time taken by ball to reach the ground :

$-h = 0 - \frac{1}{2}gt^{2}$

t = $\sqrt{2gh}$

t = $\sqrt{2*9.8*5$

t = 9.9 s (rounded)

Next, we will find the horizontal distance covered by ball :
D = v*t
D = 5 * 9.9

D = 49.5m

Therefore, the ball will be 49.5m from the base when it hits the ground for the first time based on 9.8m/s² earth gravity.

Learn more about earth gravity brainly.com/question/11174601

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8 0

1 year ago

A person driving her car at 43 km/h approaches an intersection just as the traffic light turns yellow. She knows that the yellow

siniylev [52]

Answer:

If she hits the brakes, she will travel 13m before stopping. If she hits the gas, she will travel 28 before the light turns red. She should try to stop

Explanation:

To know how far she will travel before stopping, we need to use a kinematic formula which initial final velocity (Vf), initial velocity (V0), acceleration (a) and distance traveled(x):

$V_{f}^{2}=V_{0} ^{2} +2ax$

The moment in which she stops is when the final velocity equals zero. In this case, initial velocity is 43km/h=12m/s, and its maximum deceleration is -5.4m/s^2. Plugging in these values and solving for x:

$0^2=(12m/s)^2+2(-5.4m/s)x\\x=13m$