1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
denpristay [2]
3 years ago
6

MULTIPLE CHOICE PLEASE HELP QUICK!!!!!!

Physics
2 answers:
Natasha_Volkova [10]3 years ago
6 0

Answer:

934 m/s and it is faster in hydrogen than in air

Explanation:

Speed of sound in gas is given by the formula

v = \sqrt{\frac{\gamma RT}{M}}

here we know for hydrogen

M = 2 g/mol

R = 8.31 J/mol k

\gamma = 1.4

T = 0 degree C = 273 K

now we will have

v = \sqrt{\frac{(1.4)(8.31)(273)}{0.002}}

v_{hydrogen} = 1260.2 m/s

Now for air we know that

M = 29 g/mol

R = 8.31 J/mol k

\gamma = 1.4

T = 30 degree C = 303 K

now we will have

v = \sqrt{\frac{(1.4)(8.31)(303)}{0.029}}

v_{air} = 348.6 m/s

so the difference in the speed is given as

\Delta v = v_{hydrogen} - v_{air}

\Delta v = 1260.2 - 348.6 = 911.4 m/s

so the closest answer is 934 m/s and it is faster in hydrogen than in air

vekshin13 years ago
5 0
 i would choose a for 945 and a for faster
You might be interested in
Surface currents and waves are powered by what
Allisa [31]
It is powered by the Earth's rotation and the moon gives a little boost.
4 0
3 years ago
Mason notices that his boat sinks lower into the water in a freshwater lake than in the ocean. What could explain this?
zloy xaker [14]

Answer:

Salt water is more dense than freshwater.

8 0
3 years ago
Read 2 more answers
PLZ! PLZ! PLZ! HELP! WILL GIVE BRAINLIEST! Scientific Claim Engaging in scientific argument is a critical piece to the applicati
Nastasia [14]

Answer:

Explanation:

1The study of science and engineering should produce a sense of the process of argument necessary for advancing and defending a new idea or an explanation of a phenomenon and the norms for conducting such arguments. In that spirit, students should argue for the explanations they construct, defend their interpretations of the associated data, and advocate for the designs they propose. (NRC Framework, 2012, p. 73)

Argumentation is a process for reaching agreements about explanations and design solutions. In science, reasoning and argument based on evidence are essential in identifying the best explanation for a natural phenomenon. In engineering, reasoning and argument are needed to identify the best solution to a design problem. Student engagement in scientific argumentation is critical if students are to understand the culture in which scientists live, and how to apply science and engineering for the benefit of society. As such, argument is a process based on evidence and reasoning that leads to explanations acceptable by the scientific community and design solutions acceptable by the engineering community.

Argument in science goes beyond reaching agreements in explanations and design solutions. Whether investigating a phenomenon, testing a design, or constructing a model to provide a mechanism for an explanation, students are expected to use argumentation to listen to, compare, and evaluate competing ideas and methods based on their merits. Scientists and engineers engage in argumentation when investigating a phenomenon, testing a design solution, resolving questions about measurements, building data models, and using evidence to evaluate claims.

Compare and critique two arguments on the same topic and analyze whether they emphasize similar or different evidence and/or interpretations of facts.

Respectfully provide and receive critiques about one’s explanations, procedures, models and questions by citing relevant evidence and posing and responding to questions that elicit pertinent elaboration and detail.

Construct, use, and/or present an oral and written argument supported by empirical evidence and scientific reasoning to support or refute an explanation or a model for a phenomenon or a solution to a problem.

Make an oral or written argument that supports or refutes the advertised performance of a device, process, or system, based on empirical evidence concerning whether or not the technology meets relevant criteria and constraints.

Evaluate competing design solutions based on jointly developed and agreed-upon design criteria.

8 0
2 years ago
What is the length of the shadow cast on the vertical screen by your 10.0 cm hand if it is held at an angle of θ=30.0∘ above hor
Alchen [17]

Answer:

The  length is  D  =  5 \ cm

Explanation:

From the question we are told  that

     The  length of the  hand is  l  =  10.0 \ cm

      The  angle at the hand is  held is  \theta  =  30 ^o

Generally resolving the length the length of the hand to it vertical component we obtain that the length of the shadow on the vertical wall is mathematically evaluated as

             D  =  l * sin(\theta )

substituting values

             D  =  10 * sin (30)

             D  =  5 \ cm

5 0
3 years ago
What is heliocentric model?​
MariettaO [177]
A model of the solar system with the sun in the middle
8 0
2 years ago
Other questions:
  • What is one advantage of doing a field experiment instead of a laboratory experiment
    5·1 answer
  • State the 3 laws of motion
    7·1 answer
  • The difference between tension and traction?
    7·1 answer
  • A wave is approaching a barrier that has a small hole at the center. Which describes the change in the wave as it encounters the
    15·2 answers
  • Which combination of characteristics produces the LEAST energetic waves?
    9·1 answer
  • A 19 nC charge is moved in a uniform electric field. The electric field does 5.3 μJ of work as the charge moves from point A to
    7·1 answer
  • If you have to apply 40 N of force to a crowbar to lift a rock that weighs 400 N, what is the actual mechanical advantage of the
    8·2 answers
  • If a car travels at speed 10 m/s with an engine force of 2000 N, calculate the power of the car
    6·1 answer
  • 80
    8·1 answer
  • A particle starts from rest and is acted on by a net force that does work at a rate that is proportional to the time t. The spee
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!