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
dexar [7]
3 years ago
7

Which of the following is a chemical change

Physics
2 answers:
alina1380 [7]3 years ago
5 0
What are the options u can't say that and expect me to know wat u talkin bout
mel-nik [20]3 years ago
5 0

I'm guessing the answer choices are:

A. ice melting

B. ice being carved

C. water boiling

D. water breaking down into hydrogen and oxygen

The answer, if any of these choices, would be C

You might be interested in
Why is Tycho Brahe often called “the greatest naked-eye astronomer” of all time?
riadik2000 [5.3K]

Answer:Explained Below

Explanation:

Tycho Brahe saw a super nova which inspired him to study astronomy.His observations are 5 times more accurate than other astronomers of his time   and thus he was given a private island to study about astronomy  .He made most accurate naked eye measurements ever.

So he can be said to be the "greatest naked eye astronomer of all time"

6 0
3 years ago
A girl playing tug-of-war with her dog pulls the dog a distance of 8.0m by exerting a force at an angle of 18° with the horizont
AnnZ [28]

Answer:

25 N

Explanation:

Work is a product of force and perpendicular distance moved.

W=Fd where F is force exerted and d is perpendicular distance.

However, for this case, the distance is inclined hence resolving it to perpendicular so that it be along x-axis we have distance as dcos\theta

Therefore, W=Fdcos\theta

Making F the subject of the formula then

F=\frac {W}{dcos\theta} where \theta is the angle of inclination. Substituting 190 J for W then 18 degrees for \theta and 8 m for d then

F=\frac {190}{8cos18^{\circ}}\approx 25N

3 0
3 years ago
Light waves are not mechanical waves. The Sun transmits light waves to Earth through __________ _________. *
Natasha2012 [34]
Electromagnetic waves?
3 0
3 years ago
Read 2 more answers
What is the period (in hours) of a satellite circling Mars 100 km above the planet's surface? The mass of Mars is 6.42 × 1023 kg
scZoUnD [109]

To solve this problem it is necessary to apply the concepts related to the Centrifugal Force and the Gravitational Force. Since there is balance on the body these two Forces will be equal, mathematically they can be expressed as

F_c = F_g

\frac{mv^2}{r} = \frac{GmM}{r^2}

Where,

m = Mass

G =Gravitational Universal Constant

M = Mass of the Planet

r = Distance/Radius

Re-arrange to find the velocity we have,

v^2 = \frac{GM}{r}

At the same time we know that the period is equivalent in terms of the linear velocity to,

T = \frac{2\pi}{\frac{v}{r}}

v = \frac{2\pi r}{T}

If our values are that the radius of mars is 3400 km and the distance above the planet is 100km more, i.e, 3500km we have,

v^2 = \frac{GM}{r}

( \frac{2\pi r}{T})^2 =  \frac{GM}{r}

T = \sqrt{\frac{4\pi^2 r^3}{GM}}

Replacing we have,

T = \sqrt{\frac{4\pi^2 (3500*10^3)^3}{(6.67430*10^{-11})(6.42*10^23)}}

T = 6285.09s (\frac{1min}{60s})(\frac{1hour}{60min})

T= 1.74hour

Therefore the correct answer is C.

7 0
3 years ago
what is the density to the nearest hundredths, of a metal with a volume of 3.00 cm3 and a mass of 8.13g?
I am Lyosha [343]
Since D=M/V, the answer would be 2.7
8 0
3 years ago
Other questions:
  • Which of the following is the best definition of viscosity? A. the tendency of a fluid to support a floating object B. the abili
    13·2 answers
  • Which kinds of objects emit visible light in the electromagnetic spectrum?1)all objects2)radioactive objects3)relatively cold ob
    8·1 answer
  • What will happen when these two waves interact?
    9·1 answer
  • a ball is kicked on level ground with a speed of 30 m/s at angle of 40 degrees above horizontal g Find the minimum velocity of t
    9·1 answer
  • An 8 kg cat is running 4 m/s. How much kinetic energy does it have?
    12·1 answer
  • A politician running for office tells a crowd at a rally that the only way to keep the food chain safe is to stop allowing the g
    11·1 answer
  • 1. Faça as transformações:
    5·1 answer
  • The table below shows the average wind speeds of four hurricanes in Florida
    5·2 answers
  • NEED HELP!!! ANSWER THESE 4 QUESTIONS FOR 20 POINTS!!!! PLEASE ANSWER!! I WILL GIVE YOU BRAINEST
    14·1 answer
  • A wire coil inside a generator has 150 square loops and an area equal to 0.042 m2.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!