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LenaWriter [7]
3 years ago
12

URGENT! Please define these, and give an example.

Physics
1 answer:
adelina 88 [10]3 years ago
6 0

Testable: Able to be tested or tried.

<em>ex. An example of a testable hypothesis is, Students who attend class more have higher grades, while those who skip have lower grades. </em>

Data: Data is the items of information that represent our analyze, or our findings in an experiment.

<em>ex. An example of Data, is the results of information collected for a research paper.</em>

Evidence: Evidence is information that helps show whether a proposed idea is valid.

<em>ex. We can use evidence to help support our point and strengthen our findings with reasoning.</em>

Theory: Theory is an explanation of something in the natural world that can be tested and gives us the same results each time. A proven hypothesis.

<em>ex. Examples of scientific theories are gravitation, evolution, and plate tectonics. </em>

Hypothesis: A hypothesis is a theory or question that can be tested through study and experimentation. It has more reasoning to it than a simple guess, but not enough information to be a theory.

<em>ex. An example of a possible hypothesis is, If we play music while working on homework, the participant's perfomance will increase.</em>

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1. The illuminance on a surface is 6 lux and the surface is 4 meters from the light source. What is the intensity of the source?
Crank

<u>Answer</u>

1) A. 96 Candelas

2) A. Both of these types of lenses have the ability to produce upright images.

3) C. 5 meters


<u>Explanation</u>

Q1

The formula for calculation the luminous intensity is;

Luminous intensity = illuminance × square radius

Lv = Ev × r²

= 6 × 4²

= 6 × 16

= 96 Candelabra

Q2

For converging lenses, an upright image is formed when the object is between the lens and the principal focus while a diverging lens always forms and upright image.

A. Both of these types of lenses have the ability to produce upright images.

Q3

Luminous intensity = illuminance × square radius

square radius = Luminous intensity/ illuminance

r² = 100/4

= 25

r = √25

= 5 m




5 0
4 years ago
Read 2 more answers
When a piece of copper is taken to the moon , a change will be observed in it's ?​
SpyIntel [72]
Weight. Because there is less gravity on the moon.
3 0
3 years ago
Cliff divers at Acapulco jump into the sea from a cliff 37.1 m high. At the level of the sea, a rock sticks out a horizontal dis
Stella [2.4K]

Answer:

v_x = 4.87 m/s

Explanation:

Height of the cliff is given as

h = 37.1 m

now the time taken by the diver to hit the surface is given as

h = \frac{1}{2}gt^2

37.1 = \frac{1}{2}(9.8)t^2

t = 2.75 s

Now in the same time it has to cover a distance of 13.39 m

so the speed in horizontal direction is given as

v_x = \frac{x}{t}

v_x = \frac{13.39}{2.75}

v_x = 4.87 m/s

3 0
4 years ago
Talia is on a road trip with some friends. In the first 2 hours, they travel 100 miles. Then they hit traffic and go only 30 mil
emmainna [20.7K]
Since Speed, V = Distance/Time
Average speed = Total Distance/Total Time

From the given data, Total Distance = 100 + 30 + 75 miles
and Total Time = 2 + 1 + 1 hours

Average Speed = 205/4
Average Speed = 51.25 mph ( or 51mph to the nearest whole number)
3 0
3 years ago
Read 2 more answers
The tip of a fan blade is 0.61 m from the center of the fan. The fan turns at a constant speed and completes 2 rotations every 1
Liono4ka [1.6K]
Time period of fan (t) = 1 / 2 = 0.5 seconds

Angular velocity (ω)= 2π/t
ω = 4π

v = ωr
v = 4π x 0.61
v = 7.66 m/s
7 0
4 years ago
Read 2 more answers
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