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3 years ago

12

The students in Miss Washburn’s class use different methods to conduct

1 answer:

pychu [463]3 years ago

4 0

Answer:

b

Explanation:

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The type of chemical bond that involves the transfer of electrons between atoms is a(n) bond.

GaryK [48]

<h3>Answer;</h3>

<em>-Ionic bond</em>

<h3>Explanation;</h3>

<u>Ionic bond</u> is a type of bonds that results from transfers of electrons from one atom to another. This types of bond is formed between metals and non metals.
Metals lose electrons to form cations (positively charged ion) and non metals gain electrons forming anions, negatively charged ion.
For instance; between sodium and chlorine element; sodium donates a single electron to attain a stable configuration while chlorine gains an electron to achieve stable configuration, thus forming an ionic compound sodium chloride.

7 0

3 years ago

Read 2 more answers

An 80-kg bungee jumper jumps off a bridge. Rubber bungee cords act as a large spring attaching the jumper to the bridge. A bear

inysia [295]

Answer:

The force is $F_b = 216 \ N$

Explanation:

From the question we are told that

The mass of the bungee jumper is m = 80 kg

The spring constant is $k = 20 \ N/ m$

The extension of the rubber bungee cords is x = 50 m

Generally the weight of the jumper is

$W = m * g$

=> $W = 80 * 9.8$

=> tex]W = 784 \ N [/tex]

Generally the returning force of the rubber bungee cords is mathematically represented as

$F = k * x$

=> $F = 20 * 50$

=> $F = 1000 \ N$

The force to be applied by the bear is

$F_b = F - W$

=> $F_b = 100 - 784$

=> $F_b = 216 \ N$

6 0

3 years ago

8. A boy pulls a 20.0-kg box with a 140-N force at 30° above a horizontal surface. If the coefficient of kinetic friction betwee

LenaWriter [7]

0.280 m is the correct answer

8 0

3 years ago

A stereo speaker is rated at P1000 = 52 W of output at 1000 Hz. At 20 Hz, the sound intensity level LaTeX: \betaβ decreases by 1

baherus [9]

Answer:

The value of the power is $P_c = 38.55 \ W$

Explanation:

From the question we are told that

The power rating $P_{1000} =P_b= 52 \ W$

The frequency is $f = 1000 \ Hz$

The frequency at which the sound intensity decreases $f_k = 20 \ Hz$

The decrease in intensity is by $\beta = 1.3 dB$

Generally the initial intensity of the speaker is mathematically represented as

$\beta_1 = 10 log_{10} [\frac{P_b}{P_a} ]$

Generally the intensity of the speaker after it has been decreased is

$\beta_2 = 10 log_{10} [\frac{P_c}{P_a} ]$

So

$\beta_1-\beta_2 = 10 log_{10} [\frac{P_c}{P_a} ]- 10 log_{10} [\frac{P_b}{P_a} ]$

=> $\beta = 10 log_{10} [\frac{P_c}{P_a} ]- 10 log_{10} [\frac{P_b}{P_a} ]= 1.3$

=> $\beta =10log_{10} [\frac{\frac{P_b}{P_a}}{\frac{P_c}{P_a}} ] = 1.3$

=> $\beta =10log_{10} [\frac{P_b}{P_c} ] = 1.3$

=> $10log_{10} [\frac{P_b}{P_c} ] = 1.3$

=> $log_{10} [\frac{P_b}{P_c} ] = 0.13$

taking atilog of both sides

$[\frac{P_b}{P_c} ] = 10^{0.13}$

=> $[\frac{52}{P_c} ] = 10^{0.13}$

=> $P_c = \frac{52}{1.34896}$

=> $P_c = 38.55 \ W$

3 0

3 years ago

Sound travels at 343 m/s through dry air. If a lightening bolt strikes the ground 2 km away from you, how long will it take for

Minchanka [31]

Answer:

0.006 km / m/s

Explanation:

divide 343 m/s and 2 km

4 0

2 years ago