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3 years ago

Which phrase best describes a metallic bond?

2 answers:

6 0

Metallic bonding is the force of attraction between valence electrons and the metal ions. It is the sharing of many detached electrons between many positive ions,

Hopefully this can help you understand

Tresset [83]3 years ago

4 0

Metallic bonding is the force of attraction between valence electrons and the metal ions. It is the sharing of many detached electrons between many positive ions, where the electrons act as a "glue" giving the substance a definite structure.

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A 77.0 kg woman slides down a 42.6 m long waterslide inclined at 42.3. at the bottom, she is moving 20.3 m/s.how much work did f

svlad2 [7]

Answer:

W = 21409.2 J

Explanation:

Given,

The mass of the woman, m = 77 Kg

The length of the water slide, S = 42.6 m

The inclination of the water slide, ∅ = 42.3

The constant velocity of the women sliding, 20.3 m/s

The kinetic friction of the sliding force is given by the formula

Fₓ = μₓ η

Where,

μₓ - coefficient of kinetic friction

η - normal force acting on the body

Since the water slide is inclined at an angle and the person is sliding with constant velocity. The coefficient of friction becomes,

μₓ = tan∅

And, η = mg cos∅

Therefore, the kinetic friction force becomes

Fₓ = tan∅ mg cos∅

Substituting the given values in the above equation

Fₓ = 0.9 x 77 x 9.8 x 0,74

= 502.56 N

The work done by the kinetic friction on the person

W = Fₓ · S

= 502.56 N x 42.6 m

= 21409.2 J

Hence, the work done by the friction on the woman is, W = 21409.2 J

8 0

3 years ago

How much will stretch a spring that has spring constant of 735 N/m, if you vertically hung a 2. 30 kg object from it. How much w

otez555 [7]

Answer:

Part 1 = 0.03m, Part 2 = 1.4651J

4 0

3 years ago

Read 2 more answers

Which graph represents the solution set of the system of inequalities? {−2x+y≤4y>x+2

Jet001 [13]

Answer:

The fourth graph is the answer

Explanation:

We have inequalities

$-2x+y\leq 4$ $\rightarrow y\leq 2x+4$

$y>x+2$

For the first inequality all points at or below the graph of y are solutions, and for the second inequality all the points above the graph of y are the solutions. So, the solution to these inequalities are points that are above the graph of $y>x+2$ and below the graph of $y\leq 2x+4$ . The shaded region in the fourth graph satisfies these conditions.

Looking at other choices, we see that the first two graphs do not even represent the graphs of our inequalities, and the third graph does represent the inequalities but shades the wrong region.

P.S: the graph of the inequality $y>x+2$ is dashed because $y$ is "greater than" and not "equal to" $x+2$ , so this indicates that the values on the line $y=x+2$ are not included. And the graph of the inequality $y\leq 2x+4$ is a solid line because $y$ is "less than or equal to" $2x+4$ , so we are including the values on the line $y=2x+4$ , and that's why it's solid.

6 0

3 years ago

Read 2 more answers

I WILL GIVE BRAINLIST TO CORRECT ANSWERSSSS

sattari [20]

Answer:

The answer is SYMBOL B.

Explanation:

The correct schematic is the one that shows three groups of long and short lines. A schematic with one long and one short (one group) would be a one cell; a schematic with a long, a short, a long, a short (two group), would be a two cell; and a schematic with a long, a short, a long, a short, a long and a short (three group), would be a three cell- hence why the answer is symbol B.

6 0

3 years ago

If you heat a fixed quantity of gas, which of the following statements are true?Check all that apply.a.The volume will always in

kherson [118]

Answer:

Explanation:

Given

there is fix Quantity of gas i.e. mass of gas is constant

From ideal gas Equation

PV=nRT

(a) volume always increases is not true as Pressure can also be increased .

(b)If Pressure is constant along with mass then as Temperature increases, Volume also increases.

(c)true , Product of Pressure and volume depends upon temperature thus it also increases with temperature.

(d)Density of gas may or may not increases

As density is $\frac{mass}{volume}$

volume may increase or decrease as temperature increase .

(e)false

as it clearly stated that quantity of fixed therefore there is no change in gas

8 0

3 years ago