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aivan3 [116]
3 years ago
8

Rock can be weathered and eroded in the rock cycle. What might happen with the resulting rock particles? A. New rock is formed f

rom other rock by great heat and pressure. B. Igneous rock is formed. C. Rock is melted. D. Sediments can be lithified to form new rock.
Physics
2 answers:
Nostrana [21]3 years ago
4 0
Answer: A
After rocks are eroded the particles turn into a sedimentary rock.
IceJOKER [234]3 years ago
3 0
Really the right answer is D:sediments can be lithified to new rock that the right answer 
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What should be the speed of an artificial satellite moving on a circular orbit around the Earth at a distance of 400 km from the
Drupady [299]

Answer:

7.67001846 km/s or 17157.38529 mph

Explanation:

G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²

M = Mass of the Earth =  5.972 × 10²⁴ kg

m = Mass of satellite

v = Velocity of satellite

The distance between the Earth's center and the satellite is

r = 6371000+400000 = 6771000 m

As the centripetal force balances the force of gravity we have

\frac{mv^2}{r}=\frac{GMm}{r^2}\\\Rightarrow v=\sqrt{\frac{GM}{r}}\\\Rightarrow v=\sqrt{\frac{6.67\times 10^{-11}\times 5.972\times 10^{24}}{6771000}}\\\Rightarrow v=7670.01846\ m/s=7.67001846\ km/s

Converting to mph

7670.01846\times \frac{3600}{1609.34}=17157.38529\ mph

The velocity of the satellite is 7.67001846 km/s or 17157.38529 mph

5 0
3 years ago
Which best explains the statement "It has no definite volume”?
Reika [66]
This means that this substance has no fixed volume and can expand or shrink however it may want. An example is gas. Gas will always expand to fill up the space it is in. 
If this helped please give brainliest answer, rate, and thanks!

Thank you. 
6 0
3 years ago
Read 2 more answers
The opening to a cave is a tall, 30-cm-wide crack. A bat that is preparing to leave the cave emits a 30 kHz ultrasonic chirp. Ho
sweet-ann [11.9K]

Answer:

Width of sound beam is 7.557 m

Explanation:

First we will calculate the wave length from given data:

λ=v/f

Were:

v is the speed

f is the frequency

\lambda=\frac{340}{30*10^3}\\ \lambda=0.01133 m

We considered the opening long and narrow, Using single slit diffraction formula:

mλ=dsinΘ

where:

d is the crack width

m is the order

Θ is angle

Considering m=1, The angle between first minimum from center of beam is:

\theta=sin^{-1}(\frac{m\lambda}{d})\\\theta=sin^{-1}(\frac{1*0.01133}{30*10^{-2}})\\ \theta=2.164^o

The width of beam is:

tanΘ=y/L

tan\theta=\frac{w/2}{L}\\ w=2L\ tan\theta\\w=2*100*tan 2.164\\w=7.557 m

Width=7.557 m

5 0
3 years ago
A 100.0 gram sample of Polonium-210 is contained for 552 days. How many half-lives occur during this period of time, if the half
Leto [7]

Answer:

4 half-lives will occur during this period of time.

Explanation:

Formula used :

a_o=a\times e^{-\lambda t}

\lambda =\frac{0.693}{t_{1/2}}

a=\frac{a_o}{2^n}

where,

a = amount of reactant left after n-half lives and time t

a_o = Initial amount of the reactant.

\lambda = decay constant

t_{1\2} = half life of an isotope

n = number of half lives

We have :

a_o=100.0 g

a = ?

t = 552 days

t_{1/2}=138 days

a=100.0 g\times e^{-\frac{0.693}{138}\times 552}

a=6.254 g

6.254 g=\frac{100.0 g}{2^n}

2^n=\frac{100.0 g}{6.254 g}

n = 4

4 half-lives will occur during this period of time.

4 0
3 years ago
On which body would a 10 kg lamp have the most gravitational potential energy when lifted to height of 2 m? A) Earth B) Mars C)
MariettaO [177]

Answer: C.) Neptune

Explanation:

The Gravitational Potential Energy (GPE) of a body is calculated using the formula :

GPE = mgh

Where m = mass of the body

g = acceleration due to gravity

h = distance above a surface

Mass = 10kg

h = 2m

Using the formula :

GPE of lamp on Earth: g = 9.8

GPE = 10 × 9.8 × 2 = 71.8J

GPE of lamp on Mercury: g = 3.59

GPE = 10 × 3.59 × 2 = 196J

GPE of lamp on Mars: g = 3.7

GPE = 10 × 3.7 × 2 = 74J

GPE of lamp on Neptune: g = 14.07

GPE = 10 × 14.07 × 2 = 281.4J

GPE of lamp on Uranus: g = 9

GPE = 10 × 9 × 2 = 180J

GPE of lamp on Pluto: g = 0.42

GPE = 10 × 0.42 × 2 = 8.4J

Neptune has the highest gravitational potential energy as the value of acceleration due to gravity acting on objects is highest on Neptune.

6 0
3 years ago
Read 2 more answers
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