PHYSICS HIGH SCHOOL

as a drivers vehicle approaches an intersection at 20 m/s the driver applies the brakes in order to stop creating a uniform acceleration of 2.3 m² calculate the time required to stop

Answers

Answer 1
Answer:

Answer:

8.70 seconds.

Explanation:

1. Use the kinematic equation: v = u + at,

v = final velocity

u = initial velocity

a = acceleration

t = time.

Find variables and numbers:

v = ?

u = 20 m/s

a = -2.3 m²

v = 0 m/s

Rearrange values: t = (v - u) / a.

Plugging in the values: t = (0 - 20) / (-2.3) = 20 / 2.3

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The Moon is made up of minerals similar to those on Earth, which areA. rilles.
B. lunar breccias.
C. silicates.
D. highlands.

Answers

Let's look at them in turn until we find the correct answer:

A) Rile is a kind of formation on the moon, but it's not a mineral
B) brecchia is a kind of rock composed of broken minerals. But, lunar breccias would not be similar to those found on earth
C) is the correct answer! it's a mineral containing silica

20 miles per hour north is an example of ______A) acceleration
B) velocity
C) deceleration
D) speed

Answers

B. It's an example of velocity due to the fact that it has a measurement of speed, divided by time, and has a specific direction. Acceleration doesn't have any direction on it, but has speed divided by time. C and D have a different mode of measurement despite of the fact that it still needs meters/miles/km.

Why should the lock and key be gay?​

Answers

They shouldn't  because it's lock and key

Answer:

.-.

Explanation:

Electricity is the movement of _____ from one atom to another along a conductor.

Answers

The sentence can be completed as follows:

"Electricity is the movement of charges from one atom to another along a conductor."


The movement of the the charges is due to the presence of a potential difference across the conductor, which pushes the charges. More specifically, in normal conductors, the carriers of electricity are the electrons. Therefore we can rewrite the sentence as

"Electricity is the movement of electrons from one atom to another along a conductor."

Final answer:

Electricity is the flow of electrons from one atom to another along a conductor such as a metal wire. This motion is driven by a potential difference or voltage. While the overall speed of electron movement is slow, the propagation of the electrical effect (current) is near light speed.

Explanation:

Electricity is the movement ofelectrons from one atom to another along a conductor. These carriers of electric charge move due to potential difference, also known as voltage. For example, in a metal wire, free electrons move from the negative (low potential) end towards the positive (high potential) end of the wire, creating a flow of electricity.

An interesting detail is that while the electrons move quite slowly overall, the electric effect they produce, the electric current, propagates almost at the speed of light.

The conductor is a material that allows this movement of electrons to occur efficiently, metals like copper or silver are typical conductors.

Learn more about Electricity here:

brainly.com/question/33513737

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A 1-kilogram coconut falls out of a tree from a height of 3 meters. Determine the coconut's kinetic energy.

Answers

You first would have to find the Gravitational Potential Energy of the coconut. This can be done by multiplying PE=mgh PE=(1)(9.81)(3) PE=29.43.
However, in order to find the KE of the coconut, you would need to specify on when in the coconuts fall you would like to know the KE.
For example, at the top of the tree, before it falls, the coconut has PE of 29.43J but KE of 0J. When the coconut is about to hit the ground, though, the coconut will have a KE of 29.43J and PE of 0J.
This is because of the Law of Conservation of Energy which states that energy is not created if destroyed.
In this system, PE is converted to KE and so at the end of the fall, the coconut has the same KE as the PE it had in the beginning.

The Pangaea theory supports the theory of plate tectonics because _____.it is based on the idea that there were several land masses when Earth was first created
it is based on the idea that all the present continents were one supercontinent
it does not require scientists to support the notion that Earth's plates can move
one day, Earth will have one large land mass again

Answers

The Pangea theory supports the theory of plate tectonics because it is based on the idea that all the present continents were one super-continent. For reasons still unknown, the super-continent got separated and created separate smaller continents. This theory also supports the fact that this movement will continue until the day arrives when all the smaller continents will again merge in a different configuration to create another super-continent. 

Answer:

A

Explanation:

ITS RIGHT
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