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3 years ago

Explain why a wooden spoon a better choice then a metal spoon for stirring a boiling pot I soup

1 answer:

5 0

Metal is a conductor of heat while wood does the opposite so having a wooden spoon would keep you from burning your hand

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Which of the following correctly arranges the planets by the size of their diameter in increasing order?

valentinak56 [21]

Increasing Order..
So, it's from the little one into the biggest one..

My Answer is
C: Mercury < Earth < Saturn < Jupiter

What Shape of The Earth ?
Is it Round or Flat ?
Subjective Answer..

7 0

3 years ago

Read 2 more answers

A motorist is driving at 20m/s when she sees that a traffic light 200m ahead has just turned red. She knows that this light stay

yuradex [85]

Answer:

5.71428571422 m/s

Explanation:

u = Initial velocity = 20 m/s

v = Final velocity

s = Displacement

a = Acceleration

Time taken = 15-1 = 14 s

Distance traveled in 1 second = $20\times 1=20\ m$

$s=ut+\frac{1}{2}at^2\\\Rightarrow 200-20=20\times 14+\frac{1}{2}\times a\times 14^2\\\Rightarrow a=\frac{2(180-20\times14)}{14^2}\\\Rightarrow a=-1.02040816327\ m/s^2$

$v=u+at\\\Rightarrow v=20-1.02040816327\times 14\\\Rightarrow v=5.71428571422\ m/s$

The speed as she reaches the light at the instant it turns green is 5.71428571422 m/s

4 0

3 years ago

nsider a common mirage formed by superheated air immediately above a roadway. A truck driver whose eyes are 2.00 m above the roa

Anna11 [10]

Answer:

$n_{air} =1.0000355$

Explanation:

from snells law we have following relation

$n' Sin i = n_{air} Sin r$

$
n_{air}$ is refractive index of air

n' - refractive index of air below

i is angle of incidence = 90 - 1.30 = 88.70^o

r is refraction angle

plugging all value in above formula

$1.000293 \times sin 88.7 = n_{air} \times sin 90$

$n_{air} =1.0000355$

6 0

3 years ago

Se deja caer un objeto desde la cornisa de una casa la cual tarda en llegar al suelo 645/500 segundos. ¿Cúal es la altura de la

salantis [7]

8.15m. La altura de la casa de la cual se deja caer un objeto que tarda en caer $\frac{645}{500}s$ es de 8.15m.

La clave para resolver este problema es mediante caída libre, la velocidad inicial del objeto es 0 por lo que podemos calcular la altura h de la casa mediante la relación $h= \frac{gt^{2}}{2}$ .