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Vaselesa [24]
4 years ago
7

A roller coaster needs to climb a tall hill. How tall of a hill can it climb with an initial

Physics
1 answer:
iren [92.7K]4 years ago
3 0

Answer:

h = 11.25m

Explanation:

mgh = 1/2mv2

gh = 1/2v2

10 x h = 1/2 x 15 x 15

20 x h = 225

h = 225/20

h = 11.25m

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Match the layer of Earth with its characteristic.
mote1985 [20]

Answer:

Explanation:

The Asthenosphere -- drives the movement in the plates

<em>It is a weak and flexible part of the upper mantle of the planet Earth.</em>

<em>It is located below the lithosphere. The depth of it is between 200 and 80 kilometers below the surface. It is usually solid but in some regions it is fluid. The temperature dictates the thickness of the Asthenosphere.</em>

The Core -- the hottest layer of the Earth.

<em>The inner Core of the Earth is a layer that's located in the core of it.  By definition, it is a rock-hard ball that has the radius of 1,220 kilometers, making it 20% of the Earth's radius and 70% of the Moon's radius. The samples are not discovered. It is believed that it has the composition of iron-nickel infusion along with other elements. The temperature is appx. 5430 °C, which is similar to the temperature of the surface of the Sun.</em>

Mesosphere -- contains the lower mantle

<em>By definition, it comes from the Greek word mesos, which means '' middle ''.</em>

<em>It is the third layer of the Earth. It is located above the stratosphere and below the thermosphere. The higher the altitude,  the lower the temperature. It ends in the coldest part of the Earth, Mesopause. And it begins at the Stratosphere.</em>

Lithosphere -- contains the tectonic plates

<em>By the definition, it is also a word that came from the Greek language. It comes from the word '' lithos '' which means '' rocky ''.</em>

<em>It is a hard, outer part of the Earth.</em>

<em>On the planet Earth, it is made out of the crust of the upper mantle.  The rocks from the Lithosphere are elastic.</em>

<em>They are two types of Lithosphere -- the oceanic Lithosphere and Continental Lithosphere.</em>

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6 0
3 years ago
Read 2 more answers
At a waterpark, sleds with riders are sent along a slippery, horizontal surface by the release of a large, compressed spring. Th
steposvetlana [31]

The sleds speed when the spring returns toits uncompressed length is v = 0.03 m/s.

<u>Explanation</u>:

Given,

force constant = 42 N/cm = 0.42 N/m,   mass m = 68 kg, spring x = 0.39 m

The potential energy, U, stored in the spring is

                     U = 1/2 kx^2  

                       = 1 / 2 \times 0.42 \times (0.39)^2

                       = 0.032 J

All its potential energy has been converted into kinetic energy since it has a uncompressed length.

                    K = 1/2 mv^2

                     v = sqrt (2K / m)

                       = √(( 2 \times 0.032) / 68)

                    v = 0.03 m/s .

4 0
4 years ago
Look at the photo and answer the question
Naddik [55]

Answer:

I think D. maybe C

Explanation:

newtons is force of gravity and grams can be weight or mass in the metric system

5 0
3 years ago
Read 2 more answers
A hypothetical planet has a mass of 1.66 times that of Earth, but the same radius. What is gravitiy near its surface?
baherus [9]

Answer: 16.22 m/s^2

Explanation: g= GM/r^2 G= (6.67x 10^-11) M= 1.66(6x 10^24) r=(6400x 10^3) so

((6.67x10^-11)(1.66x 6x 10^24))/ (6400x10^3)^2 = 16.22 m/s^2

6 0
4 years ago
Read 2 more answers
. The penalties for a person's second DUI conviction include completion of __________ hours of DUI school.
Ghella [55]

Answer:

21

Explanation:

brainliest please

3 0
3 years ago
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