PHYSICS HIGH SCHOOL

-3 < -1Which sentence correctly translates the sentence shown here?
A) Negative three is to the left of negative one on the number line.
B) Negative three is to the right of negative one on the number line.
Eliminate
C) Negative three and negative one are to the right of 0 on the number line.
D) Negative three and negative one are on opposite sides of 0 on the number line.

Answers

Answer 1

Answer:

Answer:

The Answer is D

Explanation:

I know because I just took the test.

Answer 2

Answer:

Answer:

answer is D

Explanation:

Related Questions

Why are the very first stars thought to have been much more massive than the sun? (a the clouds that made them were much more massive than todays star-forming clouds. (b the temperatures of the clouds that made them were higher because the clouds consisted entirely of hydrogen and helium. (c star-forming clouds were much denser early in time?
All of the following are types of severe weather storms except __________.a. doldrums b. tornadoes c. hurricanes d. thunderstorms
How are different types of radiation arranged along the electromagnetic spectrum
A set of water waves travels at 10.0 m/s, and 4.0 waves pass you in 2.0 s. what is the wavelength of the waves?
Maria is camping when she starts to smell smoke. She turns on her radio and hears that a forest fire is heading her way. How can Maria's organ systems interact to help keep her safe? Include at least five organ systems in your response.

Matter behaving like a wave rather than like a particle is best illustrated by which phenomenon?

Answers

The photoelectric effect is about electrons being ejected from metals when light is shined on metals. The electrons do not behave like waves in the photoelectric effect. Black body radiation is all about the radiation emitted by warm bodies and not about those bodies behaving like waves. The emission spectra of atoms is all about what light is given off by atoms when electrons in those atoms jump down to lower energy levels from higher levels. That also has nothing to do with matter behaving as a wave. Interference is classically defined as the generation of a new wave with an amplitude modulated according to the waves that interfere to form that new wave. Note its emphasis on the wave part.

The conductive tissues of the upper leg can be modeled as a 40- cm-long, 12-cm-diameter cylinder of muscle and fat. The resistivities of muscle and fat are 13 Ω m and 25 Ω m, respectively. One person’s upper leg is 82% muscle, 18% fat. What current is measured if a 1.5 V potential difference is applied between the person’s hip and knee?

Answers

Answer:

current = 0.0027 A

Explanation:

the resistivity of upper leg

$\rho = 0.82 (13) + 0.18(25) = 15.16 ohm . m$

Resistance of upper leg

$R = (\rho L)/(A)$

$= (\rho L)/(\pi R^2)$

$= (15.16 * 0.40)/(\pi [(0.12)/(2)]^2)$

= 551.27 ohm

current $i = (V)/(R)$

$current = (1.5)/(551.27)$

current = 0.0027 A

Intro physics course is beginning to move into 2D kinematics, stuck on the first real question.A stone is thrown horizontally at 15m/s from the top of a cliff 44m high. What is the velocity of the rock after 2 seconds?
I tried 3(-9.8m/s2) and some other formula's but could never arrive at the correct answer of 24.7m/s. Could someone explain how to arrive at this answer and the reasoning behind it?

Answers

-- You kick it horizontally, out off of the cliff, at 15 m/s. There's no horizontal
force on it, so its horizontal speed never changes.

-- As soon as it clears the edge of the cliff, gravity starts accelerating it
downward, 9.8 m/s faster every second. After 2 seconds, it has

   (2 x 9.8) = 19.6 m/s

of downward vertical speed.

At this point, its velocity points somewhere between horizontal and downward-
vertical. I gather from the wording of the question that you're not so much
concerned with the direction of the velocity as you are with its magnitude ...
that is, the stone's speed in whatever direction it's actually moving.

You have a vector with two components: 15 horizontal and 19.6 vertical.
Those components are perpendicular, so their resultant is just the hypotenuse
of the right triangle.

   (Speed)² = (15 m/s)² + (19.6 m/s)²

   = (225 m²/s²) + (384.16 m²/s²)

   = (609.16 m²/s²) .

   Speed = √(609.16 m²/s²) = 24.681 m/s

That's where the 24.7 m/s comes from. /\

(I just looked back at the question again. Notice that we don't care
how high the cliff is. That "44m" is in there only to distract those who
don't know what they're doing, and who think that they must use it
just because it's there.)

ok so the x velocity is 15 m/s with no acceleration
the y velocity is 19.62 after 2 seconds because of acceleration of 9.81 m/s x 2

the velocity can be found by making a diagram and solving through the pythagorean theorem

15 sq + 19.62 sq = velocity sq
225 + 384.9444 = velocity sq
velocity = sqrt 609.944
velocity = 24.7

Which statement is true about the loudness of sound?A. It is directly proportional to the distance of the listener from the source.

B. It is inversely proportional to the square of the distance of the listener from the source.

C. It is directly proportional to the square of the distance between the listener from the source.

D. It is inversely proportional to the distance between the listener from the source.

Answers

Answer : The correct option is, (B)

Explanation :

There is a direct relation between the loudness of sound and the intensity of sound.

$L=10\log (I)/(I_o)$ ..........(1)

where,

L = loudness of sound

I = intensity of sound

$I_o$ = intensity of reference

From this we conclude that the loudness is directly proportional to the intensity of the sound.

There is an indirect relation between the intensity of sound and the distance of the listener from the source.

$(I_1)/(I_2)=((d_2)/(d_1))^2$ ...................(2)

From this we conclude that the intensity of sound is inversely proportional to the square of the distance of the listener from the source.

From equation (1) and (2) we conclude that the loudness of sound is inversely proportional to the square of the distance of the listener from the source.

Hence, the correct option is, (B)

Just like the gravitational force, the electrostatic force, the perceived
brightness of a light, and the strength of a radio station . . .

The loudness of a sound is inversely proportional to the square of
the distance between the observer and the source.

What is the purpose of gel electrophoresis?

Answers

The main purpose of gel electrophoresis is to separate the molecules based on their different electric charge.

Hope this helps!

Which of the following best describes the difference between speed and acceleration? A. Acceleration is the distance an object travels within a specific unit of time, whereas speed is the rate at which the acceleration or direction of an object is changing. B. Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.

C. Acceleration is the distance an object travels within a specific unit of time, whereas speed is a measure of the force necessary to change the acceleration of an object.

D. Speed is the distance an object travels within a specific unit of time, whereas acceleration is a measure of the force necessary to change the speed of an objectWhich of the following best describes the difference between speed and acceleration? A. Acceleration is the distance an object travels within a specific unit of time, whereas speed is the rate at which the acceleration or direction of an object is changing.
B. Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.
C. Acceleration is the distance an object travels within a specific unit of time, whereas speed is a measure of the force necessary to change the acceleration of an object.
D. Speed is the distance an object travels within a specific unit of time, whereas acceleration is a measure of the force necessary to change the speed of an object.

Answers

The option that best describes the difference between speed and acceleration is : ( B ) Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.

Difference between and Acceleration and Speed

Acceleration is the rate of change of velocity with time while speed is the rate of change distance with time.

Acceleration is a vector quantity because it has magnitude and direction while speed is a scalar quantity.

Hence we conclude that Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.

Learn more about vector quantity : brainly.com/question/356987

Answer:

Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.

(Apex) Pretest

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