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
ludmilkaskok [199]
3 years ago
15

The diagram shows the life cycle of a pine tree.

Chemistry
2 answers:
Brrunno [24]3 years ago
7 0

Answer: D- A seed that contains an embryo plant grows into a young pine tree.

Explanation: The embryo plant comes from a pinecone seed so it can grow into a new plant.

hodyreva [135]3 years ago
6 0

Answer: d

Explanation: a p e x

You might be interested in
What is the significance of "Er" in the diagram?
Drupady [299]

Answer:

The significance of "Er" in the diagram is :

B.) Threshold energy for reaction

Explanation:

Threshold energy : It is total amount of energy required by the reactant molecule to reach the transition state .

Activation energy : It is the excess energy absorbed by the molecules to reach the transition state.

<u>Activation Energy = Threshold Energy - Average Kinetic Energy</u>

<u>This means Activation energy decreases on increasing kinetic energy</u>

On increasing Temperature average kinetic energy of the molecule increases which reduces the activation energy and the reaction occur faster in that case.

Catalyst also reduces the Activation energy.

<u>Er = Threshshold energy for reaction at 30 degree</u>

<u>Ea = Activation Energy</u>

<u>The given figure shows that the threshold energy decreases on increasing the temperature</u>

<u>Only the molecule having energy greater than Er can react to form product</u>

3 0
3 years ago
Read 2 more answers
Give two possible sets of four quantum numbers for the electron in hydrogen when it is in its lowest energy state.
konstantin123 [22]

Answer:

Explanation:

The electron in the lowest energy state will be found in 1 s energy level.

set of 4 possible quantum numbers

Principal quantum no : n = 1 ,

Azimuthal quantum no l = 0

Magnetic quantum no m = 0

Spin quantum no  s = + 1/2

set of other quantum nos

Principal quantum no : n = 1 ,

Azimuthal quantum no l = 0

Magnetic quantum no m = 0

Spin quantum no  s = - 1/2

4 0
3 years ago
Which laws can be combined to form the ideal gas law?
slava [35]

Option 3- Avogadro's, Charles's and Boyle's


6 0
3 years ago
10) What are the four main spheres of planet?
Tomtit [17]

Answer:

the four main spheres of the earth are geosphere, hydrosphere, atmosphere and biosphere

Explanation:

geosphere consists of all rocks on Earth

atmosphere which are the gases that surrounds the earth

hydrosphere which is all the water on the earth

biosphere which are the living things on the earth

5 0
3 years ago
which two will help you measure how different colors absorb the energy in sunlight is it beaker or thermometer
KATRIN_1 [288]
Beaker does thermometer measures the thermal energy in the air
6 0
3 years ago
Other questions:
  • The atmosphere is composed of several gases. The gas which is present in the largest quantity is:
    11·2 answers
  • The energy transferred between samples of matter because of a difference in their temperatures is called a. heat. b. thermochemi
    6·1 answer
  • Determine the energy in joules of a photon whose frequency is 3.55 x10^17 hz( with units)
    11·1 answer
  • This human cause process is called ____ and can drastically increase the natural process _____​
    11·2 answers
  • Which cell copies its dna
    10·1 answer
  • What is the formula for this ionic compound and tha name ?
    15·1 answer
  • The octet rule states that, in chemical compounds, atoms tend to have
    15·2 answers
  • The compound 3-methylpentane is an example of
    6·1 answer
  • What characterizes an electrolytic cell?
    5·2 answers
  • Hello! help me please and thanks
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!