Waves keep their what even when they bounce of something

Answers

Answer 1

Answer: the answer is shape, waves keep the same shape when bouncing off something

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Which of the following statements below is correct?A. In the process of cooking a frozen pizza, only chemical changes occur.

B. Both physical and chemical changes occur when you make pizza from scratch.

C. Only chemical changes occur when you cook a frozen pizza and only physical changes occur when you make pizza from scratch.

D. You cause chemical changes in vegetables by cutting them into small pieces

Answers

C. is correct. when you make a pizza, you see the the meat or pepperoni or cheese heating up and sometimes melted. (thats physical). on the inside the crust in heated and the toppings are cooked (chemical)

Final answer:

Both physical and chemical changes occur when you make pizza from scratch.

Explanation:

The correct statement from the given options is: Both physical and chemical changes occur when you make pizza from scratch. When you make pizza from scratch, physical changes occur when you mix and shape the ingredients, while chemical changes occur during the process of baking the pizza dough and melting the cheese. These changes involve the breaking and forming of chemical bonds, resulting in the creation of new substances with different properties.

Additionally, cheese undergoes a chemical change as it melts, proteins denature, and Maillard reactions occur, resulting in the development of new flavors and textures.

Thus, making pizza from scratch is a dynamic process that encompasses both physical and chemical changes, highlighting the fascinating chemistry and physics behind this delicious culinary endeavor.

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Mr. D needs to create a lever with a mechanical advantage of 0.4. If he is going toapply his force 2 meters from the fulcrum, how far away must his load be from the
fulcrum to get the correct mechanical advantage?

Answers

Answer:

The distance of load from fulcrum is 5 m.

Explanation:

Given:

Mechanical advantage, MA = 0.4

Distance of force from fulcrum is, $\textrm{Effort arm}=2\ m$

Distance of load from fulcrum is, $\textrm{Load Arm}=?$

We know that, Mechanical advantage of a machine is the ratio of the effort arm and load arm.

So, Mechanical advantage is given as:

$MA=\frac{\textrm{Effort Arm}}{\textrm{Load Arm}}\n\n0.4=\frac{2}{\textrm{Load Arm}}\n\n\textrm{Load Arm}=(2)/(0.4)=5\ m$

Therefore, the distance of load from fulcrum is 5 m.

when was slate found

Answers

No direct answer, around the 1800s

Which discovery gave scientists the first evidence for the theory for the theory of plate tectonics

Answers

It was one of the earliest times the concept of crustal motion had been presented to the scientific world, and it lay the foundation for the creation of current plate tectonics, even if Wegener's "continental drift" hypothesis was eventually refuted.

What is Plate tectonics theory?

In order to comprehend mountain-building processes, volcanic eruptions, earthquakes, the evolution of the Earth's surface, and rebuild the continents and oceans that once covered it, plate tectonics, a theory about the dynamics of the lithosphere, revolutionized Earth sciences.

In the 1960s, the theory of tectonics was developed. The lithosphere, which really is typically 100 km thick and sits on top of the asthenosphere, a plastic layer, is said to be Earth's outermost, unyielding layer.

The lithosphere is divided into several small plates, six to eight medium-sized local plates, and seven extremely massive continental and oceanic plates.

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Alfred Wegener discovered Pangea and the theory that over time they moved apart using tectonic plates.

6. A golf ball is hit a distance of 300 yards in 10 sec. What is the speed of the golf ballo

Answers

The speed of the ball is 27.4 m/s

Explanation:

The speed of an object is given by:

$speed=(d)/(t)$

where

d is the distance covered

t is the time taken

In this problem, we have:

d = 300 yards is the distance covered by the golf ball

t = 10 s is the time taken

Keeping in mind that

1 yard = 0.914 m

We can convert the distance from yards to meters:

$d = 300 \cdot 0.914 = 274.2 m$

And substituting into the equation, we find the speed of the ball:

$speed=(274.2)/(10)=27.4 m/s$

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A sound wave is traveling at a speed of 330 m/s. If the frequency of the wave is 660 Hz, what is the wavelength of the sound wave?2 m
330 m
990 m
0.5 m