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damaskus [11]
3 years ago
13

How does vacuum reduce thermal energy transfer

Physics
2 answers:
Evgesh-ka [11]3 years ago
4 0

Answer:

Less air pressure.

Explanation:

Thermal energy travels in many different ways and one of those ways is through the air so if there's less air, it would reduce thermal energy transfer.

FrozenT [24]3 years ago
3 0
The silver coating on the inner bottle prevents heat transfer by radiation, and the vacuum between its double wall prevents heat moving by convection. The thinness of the glass walls stops heat entering or leaving the flask by conduction.
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g Initially, the motorcycle travels along a straight road with a speed of 35 m/s (this is almost 80 mph). The maximum decelerati
astraxan [27]

Given:

Initial speed of the motorcycle (u) = 35 m/s

Final speed of the motorcycle (v) = 0 m/s (Complete Stop)

Maximum deceleration of the motorcycle (a) = -1.2 m/s²

Required Equation:

\boxed{\bf{ v = u + at}}

Answer:

By substituting values in the equation, we get:

\rm \longrightarrow 0 = 35 + ( - 1.2)t \\  \\  \rm \longrightarrow  0 = 35 - 1.2t \\  \\  \rm  \longrightarrow 35 - 1.2t = 0 \\  \\  \rm  \longrightarrow 35- 35 - 1.2t = 0 - 35 \\  \\  \rm  \longrightarrow  - 1.2t =  - 35 \\  \\  \rm \longrightarrow  \dfrac{ - 1.2t}{ - 1.2}  =  \dfrac{ - 35}{ - 1.2}  \\  \\  \rm \longrightarrow  t = 29.167 \: s

\therefore Time taken by motorcycle to come to a complete stop (t) = 29.167 s

4 0
3 years ago
Which statement best describes the energy of activation?
Varvara68 [4.7K]

hi <3

i believe the answer would be D, as when the temperature increases the particles have more energy and can overcome the activation energy more rapidly.

hope this helps :)

4 0
3 years ago
Define bond length using your own words​
Brut [27]

Answer:

the free encyclopedia. In molecular geometry, bond length or bond distance is defined as the average distance between nuclei of two bonded atoms in a molecule. It is a transferable property of a bond between atoms of fixed types, relatively independent of the rest of the molecule.

Explanation:

6 0
3 years ago
A cyclist is riding along at a constant velocity of 15 m/s. He then accelerates at a uniform rate of 0.50 m/s over a distance of
VashaNatasha [74]

The cyclist accelerates for 4 seconds.

Explanation:

The motion of the cyclist is a motion at constant acceleration, so we can use suvat equations:

s=ut+\frac{1}{2}at^2

where

s = 64 m is the distance covered

u = 15 m/s is the initial velocity

t is the time

a=0.50 m/s^2 is the acceleration

Substituting into the equation,

64=15t+\frac{1}{2}(0.50)t^2\\0.25t^2+15t-64=0

Solving the equation for t,

t=\frac{-15\pm \sqrt{(15)^2-4(0.25)(-64)}}{2(0.25)}

Which gives two solution: one is negative, so we discarde it since it has no physical meaning; the other one is

t = 4 s

which is the answer we were looking for.

Learn more about accelerated motion:

brainly.com/question/9527152

brainly.com/question/11181826

brainly.com/question/2506873

brainly.com/question/2562700

#LearnwithBrainly

5 0
3 years ago
The wavelength of a sound in a certain material is 18 cm the frequency of a wave is 2000 Hy calculate the speed of the wave
Leokris [45]

Answer:

Speed = 360m/s

Explanation:

Given the following data;

Wavelength = 18cm to meters = 18/100 = 0.18m

Frequency = 2000Hz

To find the speed;

Speed = frequency * wavelength

Speed = 2000 * 0.18

Speed = 360m/s

Therefore, the speed of the wave is 360 meters per seconds.

8 0
3 years ago
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