The temperature that the aluminum will have a resistivity that is three times the resistivity copper has at room temperature is 227°C.
<h3>How to calculate the temperature?</h3>
It should be noted that the temperature of resistivity is given as:
p(t) = p(20°C) (1 + (t - 20°C)
The resistivity at room temperature is illustrated as:
pCu(20°C) = 1.68 × 10^-8
pAl(20°C) = 2.65 × 10^-8
Therefore, the equation will be:
3 × 1.68 × 10^-8 = 2.65 × 10^-8(1 + 0.00435(t - 20°C)
0.902 = 0.00435(t - 20°C)
t = 20 + 207
t = 227°C
Therefore, the temperature is 227°C.
Learn more about temperature on:
brainly.com/question/24746268
#SPJ4
The force that will make this into
equilibrium would be equal to the force of equal amount yet applied on the
opposite direction.
<span>So we are given that a force of 55 N due west
was applied, so the equilibrium force would be 55 N due east.</span>
A dull knife is actually more dangerous than a sharp one because it forces you, as the chef, to add more pressure while cutting.
<h3>Why a dull knife is more dangerous than sharpen knife?</h3>
As the chef we have cut many things. Chef have to look over all the knifes whether it is sharp or dull and whether it is long or short, et.,. They have various knifes that can be used at various places by giving force and that force can be known to be pressure.
Pressure (symbol: p or P) can be defined as the force that can be applied perpendicular for the straight to the surface of an object which will be per unit area over and there the force is gets distributed.
Pressure formula can be, P = F/A N/m².
Thus, dull knife is more dangerous than the sharp, because of the pressure.
Hence, Option D is the correct answer.
Learn more about the pressure,
brainly.com/question/12977546
#SPJ1
Answer: The accurate statement which describes the transmission of sound through various medium is D.
Explanation:
Sound is longitudinal wave in which the vibration of particles travels parallel to the propagation of the motion of the wave. It requires a medium to travel. It consists of compression and rarefaction.
Sound insulator prevents the sound to travel for example plastic, wood etc. Sound travels faster in solid medium than in liquid medium. Sound travels faster in liquid than in gas. Less elastic material absorbs sound for example paper in compare to inelastic material.
Therefore, the accurate statement which describes the transmission of sound through various medium is "Sound insulators prevent sound from being transmitted better than elastic solids.
A flash of red light and a flash of blue light enter a glass cube perpendicular to its surface at the same time. after passing through the block, the red light pulse exits first.
For any medium, other than vacuum, the index of refraction for red light is slightly lower (closer to 1 ) than that for blue light. This means that when light goes from vacuum (or air) into glass, the red light deviates from its original direction less than does the blue light. Also, as the light reemerges from the glass into vacuum (or air), the red light again deviates less than the blue light. If the two surfaces of the glass are parallel to each other, the red and blue rays will emerge traveling parallel to each other, but displaced laterally from one another.
what is refractive index?
The ratio between the speed of light in medium to speed in a vacuum is the refractive index. When light travels in a medium other than the vacuum, the atoms of that medium continually absorb and re-emit the particles of light, slowing down the speed light.
learn more about refractive index from here: brainly.com/question/28203787
#SPJ4
