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babunello [35]
3 years ago
7

What is a type of material that tries to prevent the flow of thermal energy?

Physics
1 answer:
Citrus2011 [14]3 years ago
4 0
A type of material that tries to prevent the flow of thermal energy is called an insulator.
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A particle of mas 0.1 kg moves along the trajectory x(t)-3t t where x is in meters and t is in seconds. What is the kinetic ener
devlian [24]

Answer:

Kinetic energy = 0.45 joules

Explanation:

We have velocity of the particle is

v=\frac{dx(t)}{dt}\\\\v=\frac{d(3t)}{dt}\\v=3m/s

Now kinetic energy(K.E) is given by

K.E=\frac{1}{2}mv^{2}

applying values we get

Kinetic energy =\frac{1}{2}0.1\times 3^{2}\\\\\therefore K.E=0.45Joules

6 0
3 years ago
Define very long base line interferometry
chubhunter [2.5K]
Very Long Baseline Interferometry (VLBI) is a technique being used by the United States Naval Observatory (USNO) to determine the reference frames for stars and the Earth, and to predict the variable orientation of the Earth in three-dimensional space.






Hope this helps



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5 0
3 years ago
Read 2 more answers
An engineer wishes to design a roller coaster so that
nataly862011 [7]

To prevent cars from falling, the radius at the top of the circle should be

small such cars inverted at the top remain attached during motion.

Correct response;

The radius of the coaster can be <u>C) 20 m</u>

<h3>Method by which the above option is selected</h3>

Mass of roller coaster car, m = 500 kg

Speed at the top of the circle, v = 20 m/s

Required:

The maximum radius of the circular path the roller coaster car.

Solution:

\displaystyle Centrifugal \ force, \, F_{c} = \mathbf{\frac{m \cdot v^2}{r}}

Where;

r = The radius of the circular path.

Weight of the roller coaster car = m·g = The centripetal force

Where;

g = Acceleration due to gravity = 9.81 m/s²

At equilibrium, we have;

Centrifugal force = Centripetal force

\displaystyle \frac{m \cdot v^2}{r}  = \mathbf{ m \cdot g}

Therefore;

\displaystyle r = \mathbf{ \frac{v^2}{g}}

Which gives;

\displaystyle r = \frac{20^2}{9.81} \approx 40.77

The maximum radius for safety of a roller coaster, r ≈ 40.77 meters

\displaystyle Range \ of \ radius \ of \ the \ circle = \frac{40.77}{4}  \leq Radius \ of \ circle \leq 40.77

Which gives;

Range of the radius of the circle = 10.2 ≤ Radius of circle ≤ 40.77

The correct option for safety considerations is therefore;

  • <u>C) 20 m</u>

<em>The possible question options are;</em>

<em>A) 5 m  B) 10 m  C) 20 m  D) 40 m  E) 80 m</em>

Learn more about centripetal force here:

brainly.com/question/12674230

7 0
3 years ago
If another vehicle is trying to pass your vehicle,
Vladimir [108]

Answer:

Reduce you're speed, and let the other vehicle pass you

8 0
3 years ago
In pea plants Round (R) is a dominant trait and wrinkled nose (r) is a recessive trait. Which combination would result in wrinkl
bixtya [17]
The answer is would be number 3 rr
7 0
3 years ago
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