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4 years ago

How many valence electrons are transferred from the calcium atom to iodine in the formation of the compound calcium iodide?

1 answer:

6 0

The number of valence electrons that are transferred from the calcium atom to iodine in the formation of the compound calcium iodide are (2). Valence electrons are electrons that are outside the shell of an atom. These are the ones involved in forming bonds to nearby atoms.

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When a space vehicle reenters the Earth's atmosphere, _______ energy is transformed into _______ energy.

gtnhenbr [62]

Kinetic and Heat

to fill the blanks!

3 0

3 years ago

Read 2 more answers

The drawings show two examples in which a ray of light is refracted at the interface between two liquids. In each example the in

Nataly [62]

Answer:

Possible options:

A. nA, nC, nB

B. nA, nB, nC

C. nC, nB, nA

D. nC, nA, nB

E. nB, nA, nC

Answer is D

Explanation:

When the light is refracted into liquid B it is bent away from the normal, so that nA > nB. When the light is refracted into liquid C it is bent toward the normal, so that nC > nA. Therefore, we conclude that nC > nA > nB

6 0

3 years ago

A woman is standing in the ocean, and she notices that after a wave crest passes by, five more crests pass in a time of 39.5 s.

Gnoma [55]

(a) 7.9 s

The period of a wave is time that passes between two consecutive crests (or two consecutive troughs).

In this case, we are told that five crests pass in a time of 39.5 s. Therefore we can find the period by using the proportion:

$\frac{5}{39.5 s}=\frac{1}{T}$

Where T is the period. Re-arranging the equation, we find

$T=\frac{(39.5)(1)}{5}=7.9 s$

(b) 0.127 Hz

The frequency of a wave is equal to the reciprocal of the period:

$f=\frac{1}{T}$

where

f is the frequency

T is the period

For this wave, we have T = 7.9 s, so its frequency is

$f=\frac{1}{7.9 s}=0.127 Hz$

(c) 37.9 m

The wavelength of a wave is the distance between two consecutive crests (or two consecutive troughs). For this wave, the distance between two successive crests is 37.9 m, so the wavelength of the wave is

$\lambda=37.9 m$

(d) 4.81 m/s

The speed of a wave is given by

$v=\lambda f$

where

$\lambda$ is the wavelength

f is the frequency

For the wave in the problem, we have

$\lambda=37.9 m\\f=0.127 Hz$

Therefore, the speed of the wave is

$v=(37.9)(0.127)=4.81 m/s$

8 0

3 years ago

A space probe is built with a mass of 1700 pound-mass [lbm] before launch on Earth. The probe is powered by four ion thrusters,

Ahat [919]

mass of the space probe is given as

m = 1700 lbm = 771.12 kg

each thrust will apply a net force

$F = 225 milli N = 0.225 N$

now we will have

$v = at$

$v = \frac{F}{m}*t$

given that we have final speed v = 420 miles/minute

we need to convert it into m/s

$v = 420\frac{miles}{min}*\frac{1609 m}{1 miles}*\frac{1 min}{60 s}$

$v = 11263 m/s$

now from above equation

$11263 = \frac{0.225}{771.12}* t$

$t = 3.86 * 10^7 s$

$t = 10722.3 hours = 446.8 days = 63.8 weeks$

so it will require 63.8 weeks to reach the given speed

3 0

4 years ago

Read 2 more answers

Which force is most directly responsible for radioactive beta decay?

andriy [413]

Answer;

weak interaction

<h3>Explanation;</h3>

The weak force is one of the four fundamental forces that govern all matter in the universe (the other three are gravity, electromagnetism and the strong force).
Weak interaction is the mechanism of interaction between subatomic particles that causes radioactive decay and thus plays an essential role in nuclear fission. Only weak interactions can cause the decay of fundamental particles.

3 0

3 years ago