What does trajectory mean?

Answers

Answer 1

Answer: Trajectory means the path that something follows.

It's almost always used to describe things that are dropped, thrown, or shot,
like the trajectory of baseballs, golf balls, and canon balls, or other things moving
under the influence of gravity, like comets, asteroids, and planets. But it doesn't
have to be the path of something sailing overhead from one place to another.
You'll also hear about a person's 'trajectory through life'.

Answer 2

Answer: A trajectory is the path that a moving object follows through space as a function of time. The object might be a projectile or a satellite

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When energy is transferred to air, what happens to the particles of air? (1 point) They move slower. They move faster. They cool down. none of the above

Slick Willy is in traffic court (again) contesting a $50.00 ticket for running a red light. "You see, your Honor, as I was approaching the light, it appeared yellow to me because of the Doppler effect. The red light from the traffic signal was shifted up in frequency because I was traveling towards it, just like the pitch of an approaching car rises as it approaches you." a. Calculate how fast Slick Willy must have been driving, in meters per second, to observe the red light (wavelength of 687 nm) as yellow (wavelength of 570 nm). (Treat the traffic light as stationary, and assume the Doppler shift formula for sound works for light as well.)

Answers

Answer:

$6.11*10^7m/s$

Explanation:

The Doppler effect formula for an observer approaching a source is given by equation (1);

$f_o=(f(v+v_o))/(v-v_s)...................(1)$

where $f_o$ is the frequency perceived by the observer, v is the actual velocity of the wave in air, $v_o$ is the velocity of the observer, $v_s$ is the velocity of the source and $f$ is the actual frequency of the wave.

The actual velocity v of light in air is $3*10^8m/s$ . The relationship between velocity, frequency and wavelength $\lambda$ is given by equation (2);

$v=\lambda f...........(2)$

therefore;

$f=(v)/(\lambda)...............(3)$

We therefore use equation (3) to find the actual frequency of light emitted and the frequency perceived by Slick Willy.

Actual wavelength $\lambda$ of light emitted is 678nm, hence actual frequency is

given by;

$f=(3*10^8)/(687*10^(-9))\nf=4.37*10^(14)Hz$

Also, the frequency perceived by Slick Willy is given thus;

$f_o=(3*10^8)/(570*10^(-9))\nf=5,26*10^(14)Hz$

The velocity $v_s$ of the source light is zero since the traffic light was stationary. Substituting all parameters into equation (1), we obtain the following;

$5.26*10^(14)=(4.37*10^(14)(3*10^(8)+v_o))/(3*10^8-0)$

We then simplify further to get $v_o$

$10^(14)$ cancels out from both sides, so we obtain the following;

$5.26*3*10^8=4.37(3*10^8+v_o)$

$15.78*10^8=13.11*10^8+4.37v_o\n4.37v_o=15.78*10^8-13.11*10^8\n4.37v_o=2.67*10^8$

Hence;

$v_o=(2.67*10^8)/(4.37)\nv_o=6.11*10^7m/s$

Answer:

61578948 m/s

Explanation:

λ $_(actual)$ = λ $_(observed)$ $(c+v_(o))/(c)$

687 = 570 $((3 * 10^(8) +v_(o) )/(3 * 10^(8)) )$

$v_(o)$ = 61578948 m/s

So Slick Willy was travelling at a speed of 61578948 m/s to observe this.

An explosion that destroys a massive star is called a A. nebula.
B. supernova.
C. black hole.
D. vacuum.

Answers

An explosion that destroys a massive star is called a supernova ........the answer is B) supernova

A man pushes on a box at an angle of 30.0° with a force of 20.0 N and the box moves across the floor. Which of the following component of the force do you use to calculate work?

Answers

Not sure what the given options are, but the answer is the horizontal component. This is given by Force x cos(angle), or Fcos(θ), where θ is the angle. In this case that would be 20cos(30) = 17.32N

Which is an IUPAC name for a covalent compound

Answers

In naming covalent compound (binary) based in IUPAC naming, we have 4 rules to be followed:

1. The first element of the formula will use the normal name of the given element. for example: CO2 ( Carbon Dioxide), Carbon is the element name of the first element of the formula.

2. The second element is named as if they are treated like an anion but put in mind that these are no ions in a covalent compound but we put -ide on the second element as if it is an anion.

3. Prefixes are used to indicate the number of atom of the elements in the compound. for example: mono- 1 atom, di- 2atoms, tri- 3 atoms and etc

4. Prefix "mono"is never used in naming the first element. For example: Carbon dioxide, there should be no monocarbon dioxide.

An IUPAC name for a covalent compound is ethane. For covalent compounds, IUPAC names are based on the composition and structure of the molecules. Covalent compounds typically consist of nonmetals or a combination of nonmetals and metalloids.

Ethane (C₂H₆) is a covalent compound that consists of two carbon atoms bonded to each other with single bonds, and each carbon atom is also bonded to three hydrogen atoms.

Other examples of IUPAC names for covalent compounds include:

Methane (CH₄)

Propane (C₃H₈)

Ethene (C₂H₄)

Nitrogen dioxide (NO₂)

These names are derived based on the IUPAC rules for naming covalent compounds, which consider the number and types of atoms present in the molecule.

To know more about covalent compounds:

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Name the physical quantity measured by the velocity-time graph?

Answers

The so-called "velocity-time" graph is actually a "speed-time" graph. At any point
on it, the 'x'-coordinate is a time, and the 'y'-coordinate is the speed at that time.

'Velocity' is a speed AND a direction. Without a direction, you do not have a velocity,
and these graphs never show the direction of the motion. It seems to me that it would be
pretty tough to draw a graph that shows the direction of motion at every instant of time,
so my take is that you'll never see a true "velocity-time" graph.

At best, it would need a second line on it, whose 'y'-coordinate referred to a second
axis, calibrated in angle and representing the 'bearing' or 'heading' of the motion at
each instant. The graph of uniform circular motion, for example, would have a straight
horizontal line for speed, and a 'sawtooth' wave for direction.

Physics principles involved in the tablecloth trick???

Answers

Inertia: the plates over the tablecloth will try to stay in the same state of non movement. If there is minimum friction between the tablecloth and the objects standing on it, a rapid movement of the tablecloth does not change the state of the objects.

inertia is the answer haha i'm late

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