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
Valentin [98]
3 years ago
11

How do scientists know the continents were once closer than they are today? Explain your answer in 2-3 complete sentences.

Physics
1 answer:
WITCHER [35]3 years ago
6 0

Answer:

Continental drift describes one of the earliest ways geologists thought continents moved over time. Today, the theory of continental drift has been replaced by the science of plate tectonics. 

 

The theory of continental drift is most associated with the scientist Alfred Wegener. In the early 20th century, Wegener published a paper explaining his theory that the continental landmasses were “drifting” across the Earth, sometimes plowing through oceans and into each other. He called this movement continental drift. 

You might be interested in
Ian walks 2 km to his best friend’s house, then walks 0.5 km to the library. He then makes a 2.5 km walk home. The entire walk t
Sonbull [250]

Average speed = (total distance covered) / (time to cover the distance)

Ian's total distance = (2km + 0.5km + 2.5km) = 5 km

Ian's total time = 3 hours

Average speed = (5km) / (3 hours)

Average speed = 1.66 km/hr

4 0
3 years ago
Given the displacement vector D = (4î − 8ĵ) m, find the displacement vector R (in m) so that D + R = −3Dĵ. (Express your answer
Elena-2011 [213]

Answer:

--------------------------------

Explanation:

4 0
3 years ago
The smallest unit which maintains the physical properties of a compound is a(n) _____.
Elodia [21]
A molecule, would be the correct answer
8 0
3 years ago
Read 2 more answers
HELP PLZ! A parachutist jumps out of an aeroplane and accelerates uniformly at 9.8 ms-2 for ten seconds. a. How far does she tra
Mrac [35]

Answer:

a.) 490m

b.) 98m/s

Explanation:

Given that the

Acceleration g = 9.8 m/s^2

Time = 10s

Since the parachutist jumps out of an aeroplane. The parachutist jumped out from rest. Initial velocity U is therefore equal to zero. That is,

U = 0

Distance covered = height H

The height can be calculated by using second equation of motion

H = Ut + 1/2gt^2

Substitute g and t into the formula

H = 1/2 × 9.8 × 10^2

H = 490 m

Therefore, she travels as far as 490 m

b.) Her final velocity can be calculated by using third equation of motion

V^2 = U^2 + 2gH

Substitute g and H into the formula.

Remember that U = 0

V^2 = 2 × 9.8 × 490

V^2 = 9604

V = sqrt (9604)

V = 98 m/s

Therefore, her final velocity is 98 m/s

4 0
4 years ago
¿ qué es un motor de explosión?
ArbitrLikvidat [17]

Answer:

es un motor de combustión interna con encendido por chispa.

5 0
3 years ago
Other questions:
  • A 2.40 kg can of coffee moving at 1.50 m/s in the +x-direction on a kitchen counter collides head-on with a 1.20 kg box of macar
    13·1 answer
  • When you pick a book up off the floor you are tranfering __________ energy from your hands to the ____________ energy of the boo
    7·1 answer
  • Compare the energy consumption of two commonly used items in the household. calculate the energy used by a 1.20 kw toaster oven,
    11·2 answers
  • Which factors affect heat transfer between a warm and a cool substance?
    11·1 answer
  • Suppose it turns out that one in 1 million stars has a planet that at some point in its history is home to an advanced civilizat
    13·1 answer
  • Two parallel-plate capacitors, 6.0 μF each, are connectedin series to a 10 V battery. One of the capacitors is thensqueezed so t
    12·1 answer
  • A cell of internal resistance 2 ohms supplies current to a 6 ohms resistor. What is the efficiency of the cell?. ​
    14·1 answer
  • A toy "spring gun" has a spring with a spring constant of 30,000 N/m and is depressed 4 cm. It shoots a plastic dart with a mass
    6·1 answer
  • calculate the current required to create a 0 .85-mT magnetic field at the center of a loop of wire of diameter 12 cm
    7·1 answer
  • A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 ✕ 10−4°C−1). At room temperature
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!