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4 years ago

8

You have two pieces of wire that allow electrons to pass through them when they are connected to each other. If you insert a pie

ce of rubber between the wires, the electrons do not flow. The rubber material is ______.

1 answer:

Nonamiya [84]4 years ago

8 0

The rubber material is an insulator.

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It takes 23 hours 56 minutes and 4 seconds for the earth to make one revolution (mean sidereal day). What is the angular speed o

pychu [463]

Answer:

The angular speed of the Earth is approximately $7.292\times 10^{-5}$ radians per second.

Explanation:

We suppose that Earth rotates at constant angular speed. From Rigid Body Physics, we remember that angular speed of the planet ( $\omega$ ), measured in radians per second, is:

$\omega = \frac{2\pi}{T}$ (Eq. 1)

Where $T$ is the period, measured in seconds.

Therefore, the angular speed of the planet is:

$\omega = \frac{2\pi}{23\,h\times \frac{3600\,s}{1\,h}+56\,min\times 60\,\frac{s}{min}+4\,s }$

$\omega \approx 7.292\times 10^{-5}\,\frac{rad}{s}$

The angular speed of the Earth is approximately $7.292\times 10^{-5}$ radians per second.

6 0

3 years ago

PLEASE HELP! I'LL GIVE BRAINLEST

erma4kov [3.2K]

Answer:

8.162

Explanation:

W=mg

= 2.2 x 3.71

= 8.162 N

5 0

3 years ago

Two clear but non-mixing liquids each of depth 15 cm are placed together in a glass container. The liquids have refractive indic

vladimir1956 [14]

Answer:

The apparent depth d = 19.8495 cm

Explanation:

The equation for apparent depth can be expressed as:

$d = \dfrac{d_1} {\mu_1}+\dfrac {d_2}{\mu_2}$

here;

$d_1 = d_2 = 15 \ cm$

$\mu_1$ = refractive index in the first liquid = 1.75

$\mu_2$ = refractive index in the second liqquid= 1.33

∴

$d = \dfrac{15}{1.75}+\dfrac{15}{1.33}$

$d = 15( \dfrac{1}{1.75}+\dfrac{1}{1.33})$

$d = 15( 0.5714 +0.7519)$

d = 15(1.3233 ) cm

d = 19.8495 cm

6 0

3 years ago

Two girl scouts are sitting in a large canoe on a still lake while at summer camp. the canoe happens to be oriented with the fro

MrRissso [65]

That it's more puashe on the back of the canoe and that effects the back of the canoe to fall back

7 0

4 years ago

A balloon filled with helium gas has an average density of rhob = 0.22 kg/m3. The density of the air is about rhoa = 1.23 kg/m3.

MissTica

Answer:

$a=g\left(\frac{\rho_a}{\rho_b}-1\right)$

45.03681 m/s²

Explanation:

$F_b$ = Buoyant force

W = Weight of the balloon

$\rho_a$ = Density of air = 1.23 kg/m³

$\rho_b$ = Density of balloon = 0.22 kg/m³

$v_a$ = Volume of air

$v_b$ = Volume of balloon

$F_b=\rho_av_bg$

$W=\rho_bv_bg$

g = Acceleration due to gravity = 9.81 m/s²

The net force acting on the balloon is

$F=F_b-W\\\Rightarrow F=\rho_av_bg-\rho_bv_bg\\\Rightarrow \rho_bv_ba=\rho_av_bg-\rho_bv_bg\\\Rightarrow \rho_bv_ba=v_bg(\rho_a-\rho_b)\\\Rightarrow a=\frac{g}{\rho_b}(\rho_a-\rho_b)\\\Rightarrow a=g\left(\frac{\rho_a}{\rho_b}-1\right)$

The equation is $a=g\left(\frac{\rho_a}{\rho_b}-1\right)$

$a=g\left(\frac{\rho_a}{\rho_b}-1\right)\\\Rightarrow a=9.81\times \left(\frac{1.23}{0.22}-1\right)\\\Rightarrow a=45.03681\ m/s^2$

The acceleration of the balloon is 45.03681 m/s²

8 0

3 years ago