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
Ede4ka [16]
1 year ago
11

The coal with the highest energy available per unit burned is:________

Physics
1 answer:
Elan Coil [88]1 year ago
7 0
A Ignite. Because. When you put coal in a gas pit, it ignites and burns. However, there is a chance that all of us fed
You might be interested in
Test Due! Which statement is true?
Lubov Fominskaja [6]

The correct answer is C. Mercury and Mars have the same gravitational force

Explanation:

This chart compares the different features of two planets in our solar system (Mercury and Mars). In this chart, the only numerical value or feature that is the same for both planets is gravity because for both planets gravity is 1.7 m/s2. This implies the gravitational force or the force that attracts objects towards the center of the planet is the same or that objects are pulled with the same force in both planets. Moreover, this factor depends on others such as mass, density, among others.

8 0
2 years ago
Find the order of magnitude of your age in seconds
Natali5045456 [20]
The order of magnitude of my age in seconds is 10^9. I think you'll find that this is true for anyone who is 32 or older.
6 0
3 years ago
When light propagates from a material with a given index of refraction into a material with a smaller index of refraction, the s
Ket [755]
Hope this can help u
7 0
3 years ago
An object is made of glass and has the shape of a cube 0.13 m on a side, according to an observer at rest relative to it. Howeve
Vlad1618 [11]

Answer:

v=0.9833\ c

Explanation:

The density changes means that the length in the direction of the motion is changed.

Therefore,

$\text{Density} = \frac{m}{lwh}$

Given :

Side,  b = h = 0.13 m

Mass, m = 3.3 kg

Density = 8100 kg/m^3

So,

$8100=\frac{3.3}{l \times 0.13 \times 0.13}$

$l=\frac{3.3}{8100 \times 0.13 \times 0.13}$

l = 0.024 m

Then for relativistic length contraction,

$l= l' \sqrt{1-\frac{v^2}{c^2}}$

$0.024= 0.13 \sqrt{1-\frac{v^2}{c^2}}$

$0.184=  \sqrt{1-\frac{v^2}{c^2}}$

$0.033=  1-\frac{v^2}{c^2}}$

$\frac{v^2}{c^2}= 0.967$

$\frac{v}{c}=0.9833$

v=0.9833\ c

Therefore, the speed of the observer relative to the cube is 0.9833 c (in the units of c).

3 0
3 years ago
g A 475-gram ball is traveling horizontally at 12.0 m/s to the left when it is suddenly struck horizontally by a bat, causing it
AlexFokin [52]

Answer:

7.64 ms

Explanation:

3 0
2 years ago
Other questions:
  • a driver travels 135 km, east in 1.5 h, stops for 45 minutes for lunch, and then resumes driving for the next 2.0 h through a di
    13·1 answer
  • An electron moving parallel to a uniform electric field increases its speed from 2.0 × 107 m/s to 4.0 × 107 m/s over a distance
    5·1 answer
  • A high-jump athlete leaves the ground, lifting her center of mass 1.8 m and crossing the bar with a horizontal velocity of 1.4 m
    15·1 answer
  • In certain cases, using both the momentum principle and energy principle to analyze a system is useful, as they each can reveal
    5·1 answer
  • You drop a rock down a well that is 11.5 m deep.How long does it take the rock to hit the bottom of the well ?
    9·1 answer
  • When you look at green dots with a red filter what color did you see?
    13·1 answer
  • A fluid moves through a tube of length 1 meter and radius r=0.002±0.0002 meters under a pressure p=4⋅105±1750 pascals, at a rate
    15·1 answer
  • What is the net displacement of the particle between 0 seconds and 80 seconds
    9·1 answer
  • In water, sound travels 1500 m/s. A whale sings at a frequency of 17 Hz. What will be the length of the sound wave?
    6·1 answer
  • An ocean liner leaves New York City and travels 18.0o north of east for 155 km. How far east and how far north has it gone? In o
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!