Which term best describes the important pieces of information that scientists gather and record during an experiment?

Answers

Answer 1
Answer: Data. Anything a scientist measures or records for an experiment is considered data, very important information.

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What is the energy of a photon whose frequency is 6.0 x 10^20?(h=6.63 x10^-34 j•s; 1 eV=1.06x10^-19 J)


A. 1.6 MeV

B. 2.5 MeV

C. 3.3 MeV

D. 4.8 MeV

Answers

Answer:

3.75 MeV

Explanation:

The energy of the photon can be given in terms of frequency as:

E = h * f

Where h = Planck's constant

The frequency of the photon is 6 * 10^20 Hz.

The energy (in Joules) is:

E = 6.63 x10^(-34) * 6 * 10^(20)

E = 39.78 * 10^(-14) J = 3.978 * 10^(-13) J

We are given that:

1 eV = 1.06 * 10^(-19) Joules

This means that 1 Joule will be:

1 J = 1 / (1.06 * 10^(-19)

1 J = 9.434 * 10^(18) eV

=> 3.978 * 10^(-13) J = 3.978 * 10^(-13) * 9.434 * 10^(18) = 3.75 * 10^(6) eV

This is the same as 3.75 MeV.

The correct answer is not in the options, but the closest to it is option C.

How far can a bus travel in 8 h at an average speed of 60 mph?

Answers

Answer:

480 mph

Explanation:

speed = 60 mph

time = 8 hours

distance = speed*time

             = 60*8

             = 480 mph

A car accelerates uniformly from rest to a speed of 58.3 mi/h in 9.47 s. Find the constant acceleration of the car.

Answers

58.3 mi/h = (58.3x1605)/3600= 24 m/s
Acceleration = 24/9.47= 2.5 m/s^2

________ is the name for when a director decides where and when performers move and position themselves on the stage.

Answers

Answer:

Blocking/staging

Explanation:

Blocking/staging is the name for when a director decides where and when performers move and position themselves on the stage.

Moreover, Blocking a dream sequence is merely "working on the details of an actor's movements with regard to the camera." We can also reckon of blocking as the dance routines of a dance or a ballet: all the components on the set must move in perfect sync with one another (performers, extras, automobiles, crew, machinery).

PLX HELPAll elements in the same group
A) have similar chemical properties.
B) are not similar in any way.
C) are in the same state at room temperature.
D) have the same boiling and freezing points.

Answers

The answer to this question is A.

Answer:   THE ANSWER IS A!!

Explanation:

Nearly all physics problems will use the unit m/s^2 for acceleration. Explain why the seconds are squared. Why isn't the unit given as m/s, as it is for speed

Answers


Because acceleration is not speed, and speed is not acceleration. 
I'm sure you would not ask "Why isn't temperature given in acres,
as it is for area ?"  Speed and acceleration are different things, so
it's only natural that they have different units.


The magnitude (size) part of acceleration is:

         (how much speed changes) per second.

Are you speeding up ?
Are you traveling (2 meters per second) faster every second ?
Then your acceleration is

           (2 meters per second) per second .

When you write that phrase as an algebraic expression, it's

           (2 m/sec) / sec

and when you simplify that fraction, you get        2 m/sec² .