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
Daniel [21]
4 years ago
6

What is the most important force in astronomy?

Physics
1 answer:
CaHeK987 [17]4 years ago
4 0
This is probably gravity because without gravity, everything would just be some hot dust floating through space
You might be interested in
Monochromatic light is incident on a grating that is 75 mm wide and ruled with 50,000 lines. the second-order maximum is seen at
DIA [1.3K]

Answer:

The wavelength of the incident light is \lambda = 400 nm

Explanation:

Given data

Distance between the sits

d = \frac{0.075}{50000}

d = 1.5 × 10^{-6} m

\theta = 32.5°

m = 2

We know that the wavelength of the incident light is given by

\lambda = \frac{d\sin \theta}{m}

Put all the value in above formula we get

\lambda = \frac{1.5 (\sin 32.5)}{2}×10^{-6}

\lambda = 4 × 10^{-7} m

\lambda = 400 nm

Therefore the wavelength of the incident light is \lambda = 400 nm

4 0
4 years ago
Which statement about the accuracy and precision of measuring tools is
adelina 88 [10]

The true statement about the accuracy and precision of measuring tools is Tools cannot be both accurate and precise. The correct option is C.

<h3>What is accuracy?</h3>

When in an experiment, a value is measured 5 times, then if the values measured are same for most of the time or like three times out of five, it said to be accurate. The phenomenon is accuracy.

Precision is about comparing the values to each other then find them near to each other.

Accuracy compares the experimental value to the theoretical value.

So, when all the values are close to each other but not nearest to the theoretical value, then it is said to be precise but not accurate.

Thus, the correct option is C.

Learn more about accuracy.

brainly.com/question/13099041

#SPJ1

4 0
2 years ago
Sound waves are longitudinal waves that can travel through air. Would you expect sound waves to travel faster through a low-dens
Serjik [45]

Answer:

Sound waves travel faster in a low-density gas

Explanation:

First of all, let's remind that sound waves are pressure waves: they consist of oscillations of the particles in a medium, which oscillate back and forth along the direction of motion of the wave (longitudinal wave).

The speed of sound in an ideal gas is given by the equation

v=\sqrt{\gamma \frac{p}{\rho}}

where

\gamma is the adiabatic index of the gas

p is the gas pressure

\rho is the gas density

From the equation, we see that the speed of sound is inversely proportional to the square root of the density: therefore, the lower the density, the faster the sound waves.

So, sound waves will travel faster in a low-density gas.

6 0
3 years ago
Which of the following describes the renewability of utility-scale wind energy?
schepotkina [342]

Unlimited, clean energy plant describes the renewability of utility-scale wind energy.

<h3>What is utility-scale wind energy?</h3>

Utility-scale wind turbines are installed in large, multi-turbine wind farms connected to the nation's transmission system. These turbines produce clean and unlimited energy.

So we can conclude that Unlimited, clean energy plant describes the renewability of utility-scale wind energy.

Learn more about energy here: brainly.com/question/13881533

6 0
2 years ago
A Carnot engine operates between two heat reservoirs at temperatures THTH and TCTC. An inventor proposes to increase the efficie
Marat540 [252]

Answer:

e_12=1-Tc/Th

This is same as the original Carnot engine.  

Explanation:

For original Carnot engine, its efficiency is given by

e = 1-Tc/Th

For the composite engine, its efficiency is given by

e_12=(W_1+W_2)/Q_H1

where Q_H1 is the heat input to the first engine, W_1 s the work done by the first engine and W_2 is the work done by the second engine.  

But the work done can be written as  

W= Q_H + Q_C with Q_H as the heat input and Q_C as the heat emitted to the cold reservoir. So.  

e_12=(Q_H1+Q_C1+Q_H2+Q_C2)/Q_H1

But Q_H2 = -Q_C1 so the second and third terms in the numerator cancel  

each other.

 e_12=1+Q_C2/Q_H1

but, Q_C2/Q_H2= -T_C/T'

⇒ Q_C2 = -Q_H2(T_C/T')

               = Q_C1(T_C/T')

(T1 is the intermediate temperature)  

But, Q_C1 = -Q_H1(T'/T_H)

so, Q_C2 =  -Q_H1(T'/T_H)(T_C/T') = Q_H1(T_C/T_H) So the efficiency of the composite engine is given by  

e_12=1-Tc/Th

This is same as the original Carnot engine.  

7 0
3 years ago
Other questions:
  • A solenoidal coil with 26 turns of wire is wound tightly around another coil with 350 turns. The inner solenoid is 20.0 cm long
    15·1 answer
  • 1. You are standing on the roof of a building, 46.0 m above the ground. your friend, who is 1.80 m tall, is standing next to the
    14·2 answers
  • Write an expression for the potential energy of a body of mass m in the gravitational field of the earth and moon. let me be the
    8·1 answer
  • What metric unit would you use to estimate the actual distance between Boston and New York?
    14·1 answer
  • Scientific evidence documents the pattern of evolution. The evidence exists in a variety of categories. What are these categorie
    15·1 answer
  • 1. A car drives at a velocity of 40 [m/s].
    5·1 answer
  • What happens if you move a magnet near a coil of wire?
    12·2 answers
  • What we call the state in a human body if cerebrum is not functioning well​
    7·1 answer
  • Which of the following is NOT a geological event caused by the movement of tectonic plates?
    6·1 answer
  • Do all the stars move in the sky ? Explain​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!