What leads to the development of the theory?

Answers

Answer 1

Answer: Theories are developed when phenomena are observed and analyzed using the scientific method or another method of inquiry to determine if their are observable similarities and causalities which can be created into a theory. The development of theories helps to understand the physical world by providing an order and way of seeking to understand and explain the way that the world and universe are ordered or unordered.

Answer 2

Answer: The phenomena are observed and analyzed using the scientific method or another method of inquiry to determineleads to the development of the theory

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A train traveling at 82.8 kilometers per hour is blowing its horn as it approaches you. The horn has a frequency of 312 Hz. Assume the speed of the sound is 331 m/s. What is the observed frequency of the horn?335 Hz
312 Hz
292 Hz
412 Hz

Answers

The answer is 335 Hz.

To calculate this, we will use the following formula:
f₀ = f × v ÷ (v - v₁)
where:
f₀ - frequency heard
f - actual frequency
v - speed of sound
v₁ - speed of source

We know:
f = 312 Hz
v = 331 m/s
v₁ = 82.8 km/h = 23 m/s

We need:
f₀ = ?

f₀ = f × v ÷ (v - v₁)
⇒ f₀ = 312 Hz x 331 m/s ÷ (331 m/s - 23 m/s)
⇒ f₀ = 312 Hz × 331 m/s ÷ 308 m/s
⇒ f₀ = 335.3 Hz ≈ 335 Hz

Thus, the frequency of the horn is 335 Hz.

Answer:

335 Hz

Explanation:

100%

If Mike does 25.5 J of work lifting a book 1.5 m onto a shelf what is the mass of the book in kilograms

Answers

lifting the book means that the object gains gravitational potential energy. GPE=mass*gravitational field strength*height, ∴m=GPE/gh, m=25.5/10*1.5=1.7 kg

The portion of a light ray that falls on a surface is a/an A. reflected ray.
B. diffuse reflection.
C. specular reflection.
D. incident ray.

Answers

So we want to know what is a light ray that falls on a surface. The incident ray that fallls on a surface can then fe reflected, refracted or transmitted. The angle in which the incident ray is must be the same as the angle of a refracted light ray. So the correct answer is D.

d. incident ray, i just took the test yesterday

Technician A says that an oxygen sensor can have one, two, three, four, or more wires, depending on the style and design. Technician B says that if the exhaust has little oxygen, the voltage of the oxygen sensor will be close to 1 volt (1000 mV) and close to zero if there is high oxygen content in the exhaust. Who is right?

Answers

Answer:

Both technicians A and B are right.

Explanation:

-The most common application is to measure the exhaust-gas concentration of oxygen.The probe typically has four wires attached to it: two for the lambda output, and two. The number of wires depends on design and style.

-An oxygen sensor will typically generate up to about 0.9 volts( $\approx 1.0V$ ) when the fuel mixture is rich and there is little unburned oxygen in the exhaust. When the mixture is lean, the sensor's output voltage will drop down to about 0.1( $\approx 0.0V$ )volts

Select all that apply.At night, thermal energy moves _____.
from space to the atmosphere
from the land to the atmosphere
from the atmosphere to the land
from the atmosphere to space

Answers

Answer:

From the Land to the atmosphere

From the atmosphere to space

Explanation:

Answer:

from the atmosphere to space

from the Land to the atmosphere

Explanation:

An object starts at position 12 on a horizontal line with a reference point of 0. What is the position of the object if it moves 14 units to the left?

Answers

Answer:

The position of the object is $-2$

Explanation:

I add a picture of the situation in order to explain the question.

We are going to state the ''zero'' on a horizontal line. Then, we are going to state as positive the sense from left to right.

Now, if the object moves 14 units to the left , we need to subtract to the original position 14 units (because it will be a negative move given that the object is moving to the left) ⇒

$12-14=-2$

It new position will be at $-2$ .

In general, the first step to solve this kind of exercises is to set a reference system. Then, it is very important to draw the situation.

-2 is the right answer

Other Questions

Choose the correct statement. A. Turning the steering wheel rotates the pinion and moves the rack up and down B. The teeth on both the pinion and the rack are helical gears C. A large pinion means the number of turns of the steering wheel is increased D. The steering ratio is the same on all vehicles

A bartender slides a beer mug at 1.7 m/s towards a customer at the end of a frictionless bar that is 1.0 m tall. The customer makes a grab for the mug and misses, and the mug sails off the end of the bar. (a) How far away from the end of the bar does the mug hit the floor? m (b) What are the speed and direction of the mug at impact?

You travel 20.0 mph for 0.500 hour, 40.0 mph for 1.00 hour, 30.0 mph for 0.500 hour, and 50.0 mph for 2.00 hours. What is the total distance traveled?

Your boss asks you to compare two sound waves and determine which has a higher frequency. Wave A has a period o 4/100 second and Wave B has a period of 1/7 second. What would you tell your boss? A. Wave A has the higher frequency. It's frequency is 4 Hz B. Wave A has the higher frequency. It's frequency is 25 Hz C. Wave B has the higher frequency. It's frequency is 42 Hz D. Wave B has the higher frequency. It's frequency is 7 Hz