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
riadik2000 [5.3K]
4 years ago
15

Which of the following elements do living things have that volcanic rocks don’t have? A) Oxygen B) Silicon C) Magnesium D) Carbo

n
Physics
1 answer:
Mrrafil [7]4 years ago
5 0
Either A or D. If I were answering I'd go with my git answer and say A
You might be interested in
IN WHAT SEQUENCE DOES MAGMA MOVE THROUGH A VOLCANO?
Natalka [10]
Well the volcanos come from the lower crust and moves up with changes the climate
6 0
4 years ago
A 12cm candle is placed 6cm from a converging lens with a focal length of 15cm. What is the height of the image of the candle? S
amm1812

Answer:

The height of the image of the candle is 20 cm.

Explanation:

Given that,

Size of the candle, h = 12 cm

Object distance from the candle, u = -6 cm

Focal length of converging lens, f = 15 cm

To find,

The height of the image of the candle.

Solution,

Firstly, we will find the image distance of the candle. Let it is equal to v. Using lens formula to find the image distance.

\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}

v is image distance

\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{f}+\dfrac{1}{u}\\\\\dfrac{1}{v}=\dfrac{1}{15}+\dfrac{1}{(-6)}\\\\v=-10\ cm

If h' is the height of the image. Magnification is given by :

m=\dfrac{h'}{h}=\dfrac{v}{u}

h'=\dfrac{vh}{u}\\\\h'=\dfrac{-10\times 12}{-6}\\\\h'=20\ cm

So, the height of the image of the candle is 20 cm.

3 0
3 years ago
A student stands on the edge of a cliff that is 300 m high and kicks a rock horizontally. 7.8 seconds later, the rock hits the g
mart [117]

Answer:

6.65m/s

Explanation:

Using the equation of motion

S = ut + 1/2gt²

S is the height of fall

t is the time

u is the horizontal velocity

g is the acceleration due to gravity

Given

S = 300 + 50

S = 350m

t = 7.8seconds

g = 9.8m/s^2

Get S

S = 7.8u + 1/2(9.8)(7.8)²

S = 7.8u + 298.116

350 = 7.8u + 298.116

7.8u = 350 - 298.116

7.8u = 51.884

u = 51.884/7.8

u = 6.65m/s

Hence the rock's horizontal velocity was 6.65m/s

6 0
3 years ago
The sun doesn't set during what season and at what latitude?
Dahasolnce [82]

Answer: summer and greater than 66°N

Explanation:

Summer is the most appropriate season in which the sun does not set. It is a typical situation for the Arctic Circle. It is the latitude in which the sun does not set in the day and typically during the month of July. The north of this circle is a period of sunshine which last for a period of about six months in the North Pole. Summer never rises in the winter solstice (December).

4 0
3 years ago
The diagram shows two sets of vectors that result in a single vector. Four vectors added using the tip to tail method. The first
sesenic [268]

Answer:

find the sum of the two horizontal vectors and the sum of the two vertical vectors

Explanation:

made the most sense. you can beat me up if its wrong :D

8 0
3 years ago
Other questions:
  • Which of the following involve an increase in the entropy of the system under consideration? a. melting of a solid b. evaporatio
    12·1 answer
  • A point charge Q is located a short distance from a point charge 3Q, and no
    8·1 answer
  • A kangaroo jumps straight up to a vertical height of 1.66 m. How long was it in the air before returning to Earth? Express your
    10·1 answer
  • A man pulls a suitcase of mass 15 kg with a force "F" inclined at an angle of 60° to the horizontal. The frictional force betwee
    14·1 answer
  • If the wavelength is changed to λ/2, does the central spot remain bright, does the central spot become dark, or do the fringes d
    9·1 answer
  • Find the speed of sound in air that is 30.0°C.<br><br> 350<br><br> 314<br><br> 18
    12·1 answer
  • Two energy resources that do not depend on the sun's energy
    9·2 answers
  • What actions can be explained by physics?
    7·1 answer
  • Puck 1 (0.5 kg) travels with velocity 20 m/s to the right when it collides with puck 2 (2 kg) which is initially at rest. After
    5·1 answer
  • In which situation are waves transmitted?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!