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
Korolek [52]
3 years ago
11

Which statement best summarizes the theory of evolution by natural selection?

Physics
2 answers:
prisoha [69]3 years ago
8 0

Answer:

c is the one that makes the most sense

Explanation:

eimsori [14]3 years ago
6 0
I’m pretty sure it’s c
You might be interested in
How is the mass of a body measured ? Write in brief.<br>​
skad [1K]

Answer:

Mass is the quantity of matter contained in a body. The mass of an object is measured in kilogram (kg).

Explanation:

3 0
3 years ago
Read 2 more answers
A point charge of magnitude q is at the center of a cube with sides of length L
DanielleElmas [232]

Answer:

Explanation:

Answer is in the attachment below:

5 0
3 years ago
child slides down a snow‑covered slope on a sled. At the top of the slope, her mother gives her a push to start her off with a s
Strike441 [17]

Answer:

θ = 13.7º

Explanation:

  • According to the work-energy theorem, the change in the kinetic energy of the combined mass of the child and the sled, is equal to the total work done on the object by external forces.
  • The external forces capable to do work on the combination of child +sled, are the friction force (opposing to the displacement), and the component of the weight parallel to the slide.
  • As this last work is just equal to the change in the gravitational potential energy (with opposite sign) , we can write the following equation:

       \Delta K + \Delta U = W_{nc} (1)

  • ΔK, is the change in kinetic energy, as follows:

       \Delta K = \frac{1}{2}* m* (v_{f} ^{2}  - v_{0} ^{2}) (2)

  • ΔU, is the change in the gravitational potential energy.
  • If we choose as our zero reference level, the bottom of the slope, the change in gravitational potential energy will be as follows:

        \Delta U = 0 - m*g*h = -m*g*d* sin\theta (3)

  • Finally, the work done for non-conservative forces, is the work done by the friction force, along the slope, as follows:

        W_{nc} = F_{f} * d * cos 180\º \\\\  = 0.2*m*g*d* cos 180\º = -0.2*m*g*d (4)

  • Replacing (2), (3), and (4) in (1), simplifying common terms, and rearranging, we have:

      \frac{1}{2}* (v_{f} ^{2}  - v_{0} ^{2}) = g*d* sin\theta -0.2*g*d

  • Replacing by the givens and the knowns, we can solve for sin θ, as follows:              \frac{1}{2}*( (4.30 m/s) ^{2}  - (0.75 m/s)^{2}) = 9.8 m/s2*25.5m* sin\theta -0.2*9.8m/s2*25.5m\\ \\ 8.56 (m/s)2 = 250(m/s)2* sin \theta -50 (m/s)2\\ \\ sin \theta = \frac{58.6 (m/s)2}{250 (m/s)2}  = 0.236⇒ θ = sin⁻¹ (0.236) = 13.7º
8 0
3 years ago
A spelunker is surveying a cave. she follows a passage 170 m straight west, then 250 m in a direction 45â east of south, and the
almond37 [142]
Im not sure but is the magnitude 160.8?
4 0
3 years ago
An electric circuit consists of a variable resistor connected to a source of constant potential difference. If the resistance of
yulyashka [42]
Then nothing will happen
5 0
3 years ago
Other questions:
  • A student on her way to school walks eastward in a straight line 20.0 meters towards the bus stop, but realizes she dropped her
    9·1 answer
  • If the current and voltage of an electrical device (in the passive reference configuration) are v \left (t \ right) v (t) = 6 \s
    11·2 answers
  • Which sentence in the passage can be used to conclude that Eris is a dwarf planet and not a planet?
    15·2 answers
  • Jupiter's moon Io has a radius of 1.82 ✕ 106 m and a measured gravitational field of 1.80 m/s2. What is its mass (in kg)?
    13·1 answer
  • Which best describes how combustion works?
    12·2 answers
  • An electron of mass 9.11*10-31kg has an initial speed of 3.00*105m/s. It travels in a straight line and its speed increases to 7
    9·1 answer
  • An experiment is conducted using 2 plants to determine if the amount of sunlight they receive affects how fast they grow. Which
    15·1 answer
  • A convex mirror has a focal length of -12 cm. A lightbulb with
    6·1 answer
  • PLEASE HELP ME I AM TIMED!
    7·1 answer
  • The car travels 25 miles in the first 0.5 hours
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!