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djyliett [7]
3 years ago
13

Can someone please help me how to set this up?

Physics
2 answers:
fiasKO [112]3 years ago
5 0
The car has a 12 mile head start, going 80 mph, so his distance is:dcar=80∗t+12
The is going at 108 mph, so his distance is:dcop=108t
Setting them equal to each other we get:80t+12=108t⇒12=28t⇒t=1228=37
So 3/7 of an hour.about 25.7 mins.
Citrus2011 [14]3 years ago
3 0

Answer:

The time is 0.428 hr.

Explanation:

Given that,

Final speed = 108 mph

Initial speed = 80 mph

Distance = 12 miles

We need to calculate the time

Using formula of time

v = \dfrac{d}{t}

d = distance

t = time

Put the value into the formula

108-80=\dfrac{12}{t}

t = \dfrac{12}{108-80}

t =0.428\ hr

Hence, The time is 0.428 hr.

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Energy is always conserved. It cannot be created or destroyed. It can, however, be transferred between objects or systems, from
sweet-ann [11.9K]

Have in mind: Energy is always conserved and, (...) be transferred between objects or systems, from one form to another.

Hence, the true relation is C, when a system gains kinetic energy, it loses potential energy.

Think about this,

K + P = constant

If K increases, then P need to decreases to holds the above relation.

5 0
3 years ago
A spring-mass system has a spring constant of 3 N/m. A mass of 2 kg is attached to the spring, and the motion takes place in a v
REY [17]

Answer:

Ut = –(√2)/6 ×Cos(3t + π/4)

Explanation:

Please see the attachments below.

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The solution has been explained in detail, step by step.

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3 years ago
How much momentum is possessed by a 2,300 kg race car that is traveling down a race track at 20 m/s?
vodka [1.7K]

The momentum of the car is 46,000 kg m/s

Explanation:

The momentum of an object is given by

p=mv

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m is the mass of the object

v is its velocity

For the race car in the problem, we have:

m = 2,300 kg is the mass

v = 20 m/s is the velocity

Solving for the momentum, we find

p=(2300)(20)=46000 kg m/s

Learn more about momentum here:

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4 0
3 years ago
Simple diffusion and facilitated diffusion are related in that both
kaheart [24]

Answer:

allow the downward movement of the concentration gradient by passive transport

Explanation:

Passive transport is a process of substance transport, which is carried out spontaneously, without energy expenditure and in favor of the concentration gradient, that is, from a medium where the molecules are more concentrated towards a medium where their concentration is lower.

Three types of passive transport are distinguished: osmosis, simple diffusion and facilitated diffusion

<u>Simple diffusion</u>

It is the passage, through the plasma membrane, of small molecules without charge soluble in the lipid bilayer, such as some gases (oxygen and carbon dioxide). For a molecule to diffuse through the membrane it is necessary that there is a difference in concentration between the external and the internal environment.

<u>Diffusion facilitated </u>

There are molecules such as amino acids, glucose and small ions that, due to their chemical and size characteristics, cannot diffuse through the lipid bilayer and require transport proteins for diffusion.

The transport proteins are immersed in the plasma membrane and can be of two types: protein channels, formed by proteins that generate a channel in the membrane, and permeases, which are proteins that, when joined to the molecule to be transported, change their shape by carrying them into the cell.

4 0
3 years ago
according to einstein's theories of relativity name two ways that someone else's time can flow at a different rate compared to y
horsena [70]

Answer:

Astronauts on the space station and those who work deep underground.

4 0
4 years ago
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