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3 years ago

Alfred Wegener believed that all of the continents were originally:

1 answer:

5 0

Alfred Wegener believed that all of the continents were originally attached! By looking at the map, you can see that Africa and South America look like they were once joined. This 'super continent' was known as Pangaea. He also found fossils that proved his point.
Hope this helps :)

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You observe three carts moving to the left. Cart A moves to the left at nearly constant speed. Cart B moves to the left, gradual

Lady bird [3.3K]

Answer:cart B

Explanation:

For cart A speed is constant therefore there is no acceleration because acceleration is rate of change of velocity

thus there is no net force

For cart B there is change in velocity in the left direction , so there is net acceleration towards left

$Force=mass\times acceleration$

so there is net force in the left direction

For cart C there is decrease in velocity i.e. negative acceleration or deceleration . Therefore there is a net force towards right which opposes the motion

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2 years ago

what does it mean to make “difficult choices” when creating a federal budget? A) deciding how to keep interest rates on the nati

Lilit [14]

the answer is D, deciding what will be funded and what will be cut.

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3 years ago

Read 2 more answers

The Enterprise goes into orbit around a mysterious planet. The ship moves at 4200 m/s in a circle of radius 4.91 x 10^7 m. What

NeX [460]

Answer:

M = 1.3*10^25 Kg

Explanation:

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3 years ago

A 92.0-kg skydiver falls straight downward with an open parachute through a vertical height of 325 m. The skydiver's velocity re

natka813 [3]

Answer: Workdone293.02KJ

Explanation: The equation to use to calculate Workdone = Change in KE + Change in PE

Assuming velocity is constant,KE becomes 0

Workdone= Change in PE=mg

W=92×9.8×325=293.02KJ

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3 years ago

Light in a vacuum travels at a constant speed of 3x10^8 m/s. If the moons average distance from the earth is 38776106 km how lon

Karo-lina-s [1.5K]

Answer: 258.3 s

Explanation:

The speed $s$ is given by the following equation:

$s=\frac{D}{t}$

Where:

$s=3(10)^{8} m/s$ is the speed of light in vacuum

$D=2(38776106 km \frac{1000 m}{1 km})=7.75(10)^{10} m$ is the double of the distance between Earth and Moon, since the beam of light travels from Earth to the Moon and back to Earth again.

$t$ is the time it takes to the beam of light to travel the mentioned distance

Isolating $t$ and solving with the given information:

$t=\frac{D}{s}$

$t=\frac{7.75(10)^{10} m}{3(10)^{8} m/s}$

Finally:

$t=258.3 s \approx 258 s$

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3 years ago