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3 years ago

I need help pls! sooner is preferable than later! thank you!

Physics

1 answer:

steposvetlana [31]3 years ago

4 0

Answer:

Reagent: aqueous bromine

Observation with ethene: solution turns from brown to colourless.

Observation with ethane: solution remains brown

Explanation:

Unsaturated compound contain C - C double bond while Saturated compound contain C - C single bond. Alkenes with C - C double bonds (unsaturated) can undergo bromination reaction while alkanes (saturated) are not able to do so due to the absence of C - C double bonds.

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What state of matter is snow? why?

Sladkaya [172]

Answer: solids

Explanation: Snow and hail is a solid, sleet has solids within a liquid mass, and rain is liquid.

5 0

3 years ago

Read 2 more answers

Zinc is best used for making a. glass b. walls c. screws d. fertilizers

Levart [38]

C. zinc is best used for making screws. Zinc is best used for making alloys, anything made from 55% or 95% copper more then likely contain zinc

5 0

4 years ago

You are part of a mission to Mars and have been assigned the task of designing balloons for the purpose of carrying scientific i

melomori [17]

Answer:

The radius of the balloon is R= 0.974 m

Explanation:

Atmospheric density on the surface of mars ρ = 0.0154 kg/m³

Mass density of balloon σ 5 gm/m² = 0.005 kg/m²

Total mass of balloon M = density of balloon* surface area

The balloon is considered as sphere

Surface area of sphere is given by 4π R²

Mass of balloon is M =σ *4πR²

M= (0.005 kg/m²)*(4π R²)

Volume of balloon is given by $\frac{4}{3}$ πR³

Density of atmosphere of mass is given by

ρ = Mass of balloon/volume of balloon

=(0.005 kg/m²)*(4π R²)/ $\frac{4}{3}$ πR³

Re arranging R

R = $\frac{3*0.005 kg/m²}{ 0.0154 kg/m³}$

R = 0.974 m

The radius of the balloon is R= 0.974 m

3 0

4 years ago

At 96Â° F the saturation density of air is 0.04 kg/m3. If the weather report says the relative humidity is 90 % when the tempera

nalin [4]

Answer:

The value is $H = 0.036 \ kg/m^3$

Explanation:

From the question we are told that

The saturation density of air is $\rho = 0.04 \ kg/m^3$

The temperature for this saturation density to occur $T_s = 96^o F$

The relative humidity at this temperature is $R_h = 90\% = 0.90$

Generally the relative humidity is mathematically represented as

$R_H = \frac{H}{\rho}$

Here H represents humidity

=> $0.90 = \frac{H}{0.04}$

=> $H = 0.90 * 0.04$

=> $H = 0.036 \ kg/m^3$

8 0

3 years ago

An air-filled capacitor consists of two parallel plates, each with an area of 7.60 cm2, separated by a distance of 2.00 mm. If a

ValentinkaMS [17]

Answer:

a. 11.5kv/m

b.102nC/m^2

c.3.363pF

d. 77.3pC

Explanation:

Data given

$area=7.60cm^{2}\\ distance,d=2mm\\voltage,v=23v$

to calculate the electric field, we use the equation below

V=Ed

where v=voltage, d= distance and E=electric field.

Hence we have

$E=v/d\\E=\frac{23}{2*10^{-3}} \\E=11.5*10^{3} v/m\\E=11.5Kv/m$

b.the expression for the charge density is expressed as

σ=ξE

where ξ is the permitivity of air with a value of 8.85*10^-12C^2/N.m^2

If we insert the values we have

$8.85*10^{-12} *11500\\1.02*10^{-7}C/m^{2} \\102nC/m^{2}$

from the expression for the capacitance

$C=eA/d$

if we substitute values we arrive at

$C=\frac{8.85*10^{-12}*7.6*10^{-4}}{2*10^{-3} } \\C=\frac{6.726*10^{-15} }{2*10^{-3} } \\C=3.363*10^{-12}F\\C=3.363pF$

d. To calculate the charge on each plate, we use the formula below

$Q=CV\\Q=23*3.363*10^{-12}\\ Q=7.73*10^{-12}\\ Q=77.3pC$

8 0

4 years ago

I need help pls! sooner is preferable than later! thank you!​

I need help pls! sooner is preferable than later! thank you!