Answer:
polystyrene is a good insulater so less heat will escape from the cup and it will keep it warm.
the cup helps it become more insulated
Explanation:
Sound travels faster In solids than liquid than gases
Speed of sound is highest in solids, and higher in liquids and slower in gases. Example- Sound travels in air with the speed of 330 m/s, In steel it travels with a speed of 5920 m/s, In liquids it travels with a speed of 5000 m/s.
Hope this helps you
Explanation:
<em>"The accuracy of a potentiometer can be increased by decreasing the potential gradient across the potentiometer wire, and this can be achieved by increasing the length"</em>
<em />
<u>The factors that are affecting/limiting the accuracy of the potentiometer are:
</u>
-
The specific resistance of the material of the potentiometer wire.
- The potential gradient
- The current passing through the potentiometer wire.
- Area of a cross-section of the wire
- Internal temperature.
<u>The objective of reversing the terminals of the cell</u>
If the jockey of the potentiometer is pressed for a long time, joule heating sets in, so that reversing the terminals of the potentiometer will prevent the resistance due to joule heat from being added to the measured resistance, ultimately preventing unwanted resistance
Answer:
convection
Explanation:
The only way convection can only take place in liquids and gas.Since the marshmello is neither,convection is the least effective way
By the de Broglie wavelength equation, the speed of proton is <u>0.47 × </u>
<u> m/s</u>.
λ = h / mv
λ = wavelength, given = 8.29 fm
h = plank's constant, given = 6.626 × 
m = mass, given = 1.672 × 
kg
v = velocity
Now, v = h / mλ
Put the values in formula, v = h / mλ
v = 0.47 × m/s
Therefore, the speed of proton is<u> 0.47 × </u><u> m/s</u>.
Learn more about de Broglie wavelength here:- brainly.com/question/15330461
#SPJ4
