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2 years ago

Which of the following is the best evidence that Earth's continents were once in vastly different positions than they are today?

Physics

2 answers:

vredina [299]2 years ago

8 0

Answer:

B. Fossils of tropical plants are found in Antarctica.

Explanation:

That option is the best evidence from the given because it shows that once tropical plants and the continent that today is Antarctica were once together. There is no other form that plants could travel there.

It could have happened during the Permian Epoch when all the landmasses on Earth were together forming a supercontinent known as Pangea.

I hope this answer helps you.

4vir4ik [10]2 years ago

5 0

B. Fossils of tropical plants are found in Antarctica

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A motorcyclist drove 7 km at 57km/h and then another 7 km at 81 km/h. What was the average speed?

alex41 [277]

Answer:

The average speed of the car is 66.9 km/h

Explanation:

Here distance covered with the speed 57 km/h=7 km 

distance covered with the speed of 81 km/h=7 km

Average speed is equal to the ratio of total distance to the total time.

total distance= 7 + 7= 14 km

$time= \frac{distance}{speed}$

time taken to cover the first 7 km= 7/57 h

time taken to cover the second part of the journey = 7/81 h

average speed = $14/(7/57+7/81)=(14 \times 57 \times 81)/945=66.9 km/h$ 

Shortcut: 

When equal distances are covered with different speeds average speed=2 ab/(a+b) where a and b are the variable speeds in the phases. 

7 0

2 years ago

a man of mass 50 kg on the top floor of skyscraper step into an elevator what is the max weight as the elevator moves downward

shtirl [24]

514.5 N is the answer

6 0

2 years ago

Diamonds Choose one:

Daniel [21]

Answer:

D. are brought from the mantle to the surface in magma that hardens into komatiite.

Explanation:

Diamond :

It is the hardest form of carbon.The atomic atoms arrange in the cubic crystal structure and this is known as diamond cubic.Another form of the diamond at room temperature is graphite.This is used for making jewelry.This is also used in the cutting process because it has high strength.

Therefore the correct option for the diamond is D.

4 0

3 years ago

Using -10 m/s2 for acceleration due to gravity, what would be the total displacement of the object if it took 8 seconds before h

ASHA 777 [7]

If it starts from 0m/s...
s=?
u=0
a=-10
t=8
s=ut +1/2at^2
so s=(0×8)+ (0.5×-10×64)
s=0+(32×-10)
s=32×-10
s=-320metres

6 0

2 years ago

PLEASE HELP ITS DUE TODAY ILL POST THE OTHER HALF

IgorLugansk [536]

2.B
4.C
3.D
1.C
5.C
Theses are the right answer

4 0

2 years ago

Read 2 more answers