1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
pantera1 [17]
3 years ago
5

We often see cracks on rocks and stones why

Physics
1 answer:
Paul [167]3 years ago
6 0

Answer:

Due to the process of weathering and erosion.

Explanation:

  • As the rocks are made of different forms of minerals they may have an igneous, metamorphic or sedimentary origin. Hence the natural stone surfaces can be made of granite, lime, or even shale.  
  • The process of physical weathering that is called as mechanical weathering of rocks tends to break them apart and leads to the development of crack and small openings.
  • The diurnal exposure of bare rocks to extreme temperatures of day and night leads to onion peeling and slowly with water as an agent of erosion lead to cracks in joints of rocks.
You might be interested in
Calculate the speed of a car that has traveled 300 miles in 6 hours.
PilotLPTM [1.2K]
300 miles / 6 hours = 50 miles per hour
5 0
3 years ago
The element that has an average amu of 40 is represented by the symbol Zr on the Periodic Table of Elements. True False Question
Gnom [1K]

Answer:

False

Explanation:

Becuase the average amu of 40 is represented

6 0
3 years ago
You drop a rock down a well that is 5.4 m deep. How long does it take the rock to hit the bottom of the well?
Natali5045456 [20]
Equation of motion:

y_{f}=y_{o}+v_{o}t+ \frac{1}{2} at^{2}

Since initial velocity is zero, the second term goes away:

y_{f}=y_{o}+0+ \frac{1}{2} at^{2}

y_{f}=y_{o}+\frac{1}{2} at^{2}

y_{f}-y_{o}= \frac{1}{2} at^{2}

y_{f}-y_{o}=5.4m

5.4m= \frac{1}{2} at^{2}

\frac{2(5.4m) }{a} = t^{2}

a = g = 9.81  \frac{m}{ s^{2}}

\frac{2(5.4m) }{9.81 \frac{m}{ s^{2} } } = t^{2}

1.1 s^{2} = t^{2}\sqrt{1.1 s^{2}} =  \sqrt{t^{2}}

<u><em>t = 1.05s</em></u>
4 0
3 years ago
Read 2 more answers
A severe storm has an average peak wave height of 16.4 feet for waves hitting the shore. suppose that a storm is in progress wit
Agata [3.3K]

Before we answer this question, let us first understand what alternate hypothesis is.

The alternative hypothesis is the hypothesis which is used in the hypothesis testing and this is opposite to the null hypothesis. This is the test hypothesis which is usually taken to be that the observations are the result of a real effect in an experiment.

In this case since what we want to set up is the statistical test to see if the waves are dying down, then this means we are trying to determine if the wave height are decreasing, so lesser than 16.4 feet. Therefore:

The alternative hypothesis would state                 (ANSWER)

Ha: μ less than 16.4 feet and P-value area is on the left of the mean.

 

While the null hypothesis is the opposite and would state

H0: mu equals 16.4 feet 

4 0
3 years ago
A child is playing on a swing. As long as he does not swing too high the time it takes him to complete one full oscillation will
Aleks [24]

Answer:

We know that for a pendulum of length L, the period  (time for a complete swing) is defined as:

T = 2*pi*√(L/g)

where:

pi = 3.14

L = length of the pendulum

g = gravitational acceleration = 9.8 m/s^2

Now, we can think on the swing as a pendulum, where the child is the mass of the pendulum.

Then the period is independent of:

The mass of the child

The initial angle

Where the restriction of not swing to high is because this model works for small angles, and when the swing is to high the problem becomes more complex.

7 0
3 years ago
Other questions:
  • A convex lens has a focal length of 16.5 cm. Where on the lens axis should an object be placed in order to get a virtual, enlarg
    9·1 answer
  • An emu moving with constant acceleration covers the distance between two points that are 92 m
    9·1 answer
  • Start with a puddle on a sunny day. How might water move through the water cycle and eventually fall as rain
    10·1 answer
  • PLEASE HELP!!!!!!! I have 2 of these science questions!!!!
    14·2 answers
  • A golfer takes two putts to sink his ball in the hole. The first putt displaces the ball 6.50 m east, and the second putt displa
    11·1 answer
  • NEED HELP NOW. I WILL BRAINLIEST
    8·1 answer
  • WILL GIVE YOU WHAT EVER YOU WANT JUST HELP ME
    7·1 answer
  • This is a problem about a child pushing a stack of two blocks along a horizontal floor. The masses of the blocks, and the coeffi
    13·1 answer
  • The atmosphere of Mercury and Mars are very thin. What effect does the thin atmosphere have on the temperature on the surface of
    13·1 answer
  • A school bus moves at speed of 35 mi/hr for 20 miles. How long will it take the bus to get to school
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!