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3 years ago

11

Which statement describes the relationship between bond strength and the melting and boiling points of a substance? A. As the fo

rce between the particles increases, the melting and boiling points also increase. O B. As the force between the particles increases, the melting point decreases and the boiling point increases. O C. As the force between the particles increases, the melting and boiling points decrease. O D. As the force between the particles increases, the melting point increases and the boiling point decreases. SUBMIT

1 answer:

icang [17]3 years ago

4 0

Answer:

a

Explanation:

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"a 1,600 kg car is traveling at a speed of 12.5 m/s. what is the kinetic energy of the car?"

xxTIMURxx [149]

I had this question before can you show me the answers choices

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3 years ago

Scientists want to place a 3400.0 kg satellite in orbit around Mars. They plan to have the satellite orbit at a speed of 2480.0

BaLLatris [955]

Answer:

Part a)

$r = 6.96 \times 10^6 m$

Part b)

$F_g = 3.004 \times 10^3 N$

Part c)

$a = 0.88 m/s^2$

Part d)

$v = \frac{2480}{2} = 1240 m/s$

Explanation:

Part a)

As we know that the orbital speed of the satellite is given as

$v = 2480 m/s$

now we will have

$v = \sqrt{\frac{GM_{mars}}{r}}$

now we have

$M_{mars} = 6.4191 \times 10^{23} kg$

$R_{mars} = 3.397 \times 10^6 m$

now we have

$2480 = \sqrt{\frac{(6.67 \times 10^{-11})(6.4191 \times 10^{23})}{r}}$

$r = 6.96 \times 10^6 m$

Part b)

Here force between mars and satellite is the gravitational attraction force which is given as

$F_g = \frac{GM_{mars} m}{r^2}$

$F_g = \frac{(6.67\times 10^{-11})(6.4191 \times 10^{23})(3400)}{(6.96\times 10^6)^2}$

$F_g = 3.004 \times 10^3 N$

Part c)

Acceleration of satellite is the ratio of gravitational force and mass of the satellite

$a = \frac{F_g}{m}$

$a = \frac{3004}{3400}$

$a = 0.88 m/s^2$

Part d)

As we know by III law of kepler

$\frac{T_1^2}{T_2^2} = \frac{r_1^3}{r_2^3}$

here we know that T2 = 8 T1

$(\frac{1}{8})^2= \frac{r_1^3}{r_2^3}$

$\frac{r_1}{r_2} = (\frac{1}{2})^2$

so we have

$r_2 = 4r_1$

as we know that speed is given as

$v = \sqrt{\frac{GM}{r}}$

so we can say since radius is orbit becomes 4 times so the orbital speed must be half

$v = \frac{2480}{2} = 1240 m/s$

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4 years ago

1. The acronym AUDIENCE serves to remind you of what to consider when analyzing an audience. In the acronym, what does the C sta

Tom [10]

The correct answers are as follows:
1. D [CONTEXT]
The acronyms AUDIENCE stands for following:
A: Analysis
U: Understanding
D: Demographic
I: Interest
E: Enviroment
N: Needs
C: Context
E: Expectation
The acronyms is used in speech presentation to consider and analyse the audience needs so that a speaker will be able to satisfy these needs.
2. EXPECTATION. NEEDS.
The expectations and the needs of the audience are part of the things that a speaker needs to understand about his audience before presenting a speech. Expectation refers to the things that the audience expect to learn or hear from you while needs refers to the needs of the audience which must be met by the speaker.
3. CREATIVE STRATEGIES CAN HELP ENHANCE CREATIVITY DURING THE DESIGN PROCESS
Creative strategies refers to the strategies employ by designers to ensure that their designs are creative and it meets the specific goals for which they are intended. Developing a creative strategies will help a designer to carefully consider all workable plans and then choose the best one among them, thus enhancing their creativity.
4. BRAIN STORMING IS A MORE ORGANISED APPROACH TO CREATIVE DESIGN THAN IS FREE ASSOCIATION.
Brainstorming is the process by which ideas are generated by a group while free association usually involves only one person and it has to do with resolving inner conflicts and contradictions.
5. FREE ASSOCIATION
Free association is a method developed by Sigmund Freud. It is a psychoanalytical method which he used to help his patients to learn more about what they are thinking and feeling. This method bring to the fore the unconscious and the repressed thoughts of the patients.

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3 years ago

Read 2 more answers

Helppppppppppppppppppppppppp

andrew11 [14]

Answer:

value of x=35°

y=72.5°

hope it helps you

make me brainliest plz

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3 years ago

Certain x-rays have a frequency of 1.0×1019hz. calculate their wavelength in air.

Murljashka [212]

For any electromagnetic wave, the relationship between frequency and wavelength is given by
$\lambda = \frac{c}{f}$
where
$\lambda$ is the wavelength
c is the speed of light (the speed of the electromagnetic wave)
f is the frequency

For the X-rays in our problem, the frequency is $f=1.0 \cdot 10^{19}Hz$ , while the speed of light is $c=3.0 \cdot 10^8 m/s$ , so the wavelength of this radiation is
$\lambda= \frac{3 \cdot 10^8 m/s}{1.0 \cdot 10^{19} Hz} =3 \cdot 10^{-11} m$

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3 years ago