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Natasha2012 [34]
3 years ago
9

A ball rolls across the grass. Which of these statements best describes what happens to the particles that make up the ball afte

r the ball stops rolling? The particles do not move. The particles are vibrating. The particles slide past each other. The particles move from place to place.
Physics
1 answer:
Lemur [1.5K]3 years ago
5 0
The particles are vibrating
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Why are endospores used to measure the effectiveness of autoclave sterilization?
max2010maxim [7]
<span>Endospores can be quantitatively measured. This repeatability would allow for consistent measuring over time showing if there are lapses in the sterility anytime it is recommended or desired to measure it.</span>
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3 years ago
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A car goes from rest to a speed of 90 km/h in 10 seconds . What is the car's acceleration in m/s²
prisoha [69]
First you must convert Km/hr to m/s. 90 km/hr equals 25m/s (this can be done through a conversion table by plugging in the conversion values). Then you need to see what was given:
vi (initial velocity)= 0m/s
vf (final velocity= 25m/s (90km/hr)
t (time)= 10s

Next you should find an equation that requires only the values you know and gives you the value you're looking for. Sometimes that requires two equations to be used, but in this case you only need one. The best equation for this would be a=(vf-vi)/t. Finally, plug in your values (a=(25-0)/10) to get your answer which would be 2.5m/s^2. Hope this helped!
7 0
3 years ago
Rogue waves are created along the "Wild Coast" off the southeast coast of ________, where the Agulhas Current flows directly aga
Vedmedyk [2.9K]

Answer:

Africa

Explanation:

A rogue wave refers to the wave that is twice the height of a significant wave occurring in a particular area. The significant wave height is generally referred to as the mean of the largest one-third of waves existing at a particular time period. In simple words, a rogue wave is much larger than any other waves that occur at the proximity of the same time.

This rough wave describes the interaction between the ocean and sea current and swelling of waves. It takes place when the large swells in the ocean, also known as the Antarctic storms, strikes with the rapidly traveling Agulhas current, and the curved water current focuses on the energy of the waves.

Thus, these Rogue waves are often generated along the southeastern coastal regions of Africa, where there occurs the convergence of Antarctic storm waves and Agulhas Current.

4 0
2 years ago
A football player kicks the ball with an initial velocity of 28.3 m/s at an angle of 60° above the horizontal. The ball is in th
alexgriva [62]

Hi there!

Since the ball is directed 60° above the horizontal, we must use its HORIZONTAL component to find its displacement.

We can take the cosine to do so:

vcosθ = 28.3cos(60) = 14.15 m/s

Since the ball is in the air for 5 sec, we can use the following equation:

displacement = velocity · time (d = vt)

Plug in the values:

d = 14.15 · 5 = 70.75 m

6 0
2 years ago
when a book falls from a shelf to the ground without anyone pushing on it, no work is done to the book. True or False
VikaD [51]

That's false.

-- The force on the book is its weight.

-- The force acts through the distance the book falls.

-- The work done on the book is

(weight) x (length of the fall)

-- Gravity DOES the work.

8 0
2 years ago
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