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AlladinOne [14]
4 years ago
14

Write five statements that can be identified as either observations or inferences.

Physics
1 answer:
Ivan4 years ago
7 0

Answer:

Examples are stated below.

Explanation:

Observation is simply when we make use of one or more of our sense to gather information while inference is simply the explanation/conclusion we make for what we observed.

Examples are as follows;

1) - Observation: There a lot of questions on google about the year 2021 being the end of the world.

Inference:

- Many people are just too lazy to do their own proper research.

2) - Observation: There is far more cold in the winter than in summer.

- Inference: Very little sunlight shines on the Earth's surface during the winter season.

3) - Observation: The fire alarm in the school is ringing.

-Inference: The school is burning

4) - Observation: The burglar alarm in the bank is ringing.

-Inference: Robbers have broken into the bank.

5) - Observation: The field in the school is very wet.

Inference: There was heavy Rainfall in the school.

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The iron content of iron ore can be determined by titration with a standard solution. The iron ore is dissolved in , and all the
GalinKa [24]

Answer:

2.11 %

Explanation:

In acidic medium iron is in Fe ⁺³ oxidation state .

Equivalent weight = 56 / 3

= 18.33 gm

acid used in titration

= 16.37 mL of .0233 M

= 16.37 x .0233 mL of M soln

= .38 mL of M soln

.38 mL of M soln reacts with .3298 gm of ore

1000 mL of M soln = (.3298 / .38)  x 1000 gm of iron ore

867.89 gm

This must contain one gm equivalent of iron

or 18.33 gm

867.89 gm of ore contains 18.33 gm of iron

mass % of iron in the given ore

= (18.33 / 867.89)  x 100

= 2.11 %

7 0
3 years ago
Find average speed when time= 27s and total distance is 94m
Slav-nsk [51]
3.4814815 (or 3 13/27) m/s

speed = distance/time
3.4814815 (or 3 13/27) = 94/27

8 0
3 years ago
How do you do this problem?
kvasek [131]

Explanation:

First, find the velocity of the projectile needed to reach a height h when fired straight up.

Given:

Δy = h

v = 0

a = -g

Find: v₀

v² = v₀² + 2aΔy

(0)² = v₀² + 2(-g)(h)

v₀ = √(2gh)

Now find the height reached if the projectile is launched at a 45° angle.

Given:

v₀ = √(2gh) sin 45° = √(2gh) / √2 = √(gh)

v = 0

a = -g

Find: Δy

v² = v₀² + 2aΔy

(0)² = √(gh)² + 2(-g)Δy

2gΔy = gh

Δy = h/2

5 0
3 years ago
First, you will investigate purely vertical motion. The kinematics equation for vertical motion (ignoring air resistance) is giv
Ivenika [448]

Answer:

2.85 s .

Explanation:

y(t) = y(0) + v₀t + 1/2 gt²

y(t) is vertical displacement , y(0) is initial position , v₀ is initial velocity and t is time required to make vertical displacement and g is acceleration due to gravity.

Here  y(0) is zero , v₀ = 14 m/s , g = 9.8 m s⁻² , y(t ) = 0 , as the pumpkin after time t comes back to its initial position, that is ground .

We shall take v₀ as negative as it is in upward direction and g as positive as it acts in downward direction

Put the values in the equation above,

0 = 0 - 14t + 1/2 x 9.8 t²

14 t = 1/2 x 9.8 t²

t = 28 / 9.8

t = 2.85 s .

8 0
3 years ago
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What color bends the most
AlexFokin [52]
The correct answer is violet and red.
3 0
3 years ago
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