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
Aloiza [94]
3 years ago
9

Help me :DD i will mark u brainlist and u will get points and a thank u

Physics
1 answer:
Whitepunk [10]3 years ago
4 0

Answer:

  • Energy flow is the flow of energy through living things within an ecosystem. All living organisms can be organized into producers and consumers, and those producers and consumers can further be organized into a food chain. Each of the levels within the food chain is a trophic level.

  • Radiation is energy that comes from a source and travels through space at the speed of light

  • Molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break.
You might be interested in
Two concrete spans of a 380 m long bridge are
Mazyrski [523]

Answer:

4.163 m

Explanation:

Since the length of the bridge is

L = 380 m

And the bridge consists of 2 spans, the initial length of each span is

L_i = \frac{L}{2}=\frac{380}{2}=190 m

Due to the increase in temperature, the length of each span increases according to:

L_f = L_i(1+ \alpha \Delta T)

where

L_i = 190 m is the initial length of one span

\alpha =1.2\cdot 10^{-5} ^{\circ}C^{-1} is the temperature coefficient of thermal expansion

\Delta T=20^{\circ}C is the increase in temperature

Substituting,

L_f=(190)(1+(1.2\cdot 10^{-5})(20))=190.0456 m

By using Pythagorean's theorem, we can find by how much the height of each span rises due to this thermal expansion (in fact, the new length corresponds to the hypothenuse of a right triangle, in which the base is the original length of the spand, and the rise in heigth is the other side); so we find:

h=\sqrt{L_f^2-L_i^2}=\sqrt{(190.0456)^2-(190)^2}=4.163 m

4 0
3 years ago
1. Find the charge if the number of electrons is 4 x 10-18​
Marianna [84]
22. The answer is 22.
4 0
3 years ago
Does anyone know this?
e-lub [12.9K]
Explanation: The first one
Source: it literally has fusion in the name
5 0
2 years ago
Read 2 more answers
In this example we see how thermal expansion can actually throw off the accuracy of a length-measuring device—namely, a tape mea
Ulleksa [173]

Answer:

The new length is 50.00885m

Explanation:

linear thermal expansion coefficient Fe 11.8e-6 /K

The new length can be determined using the following equation:

∆L/L = α∆T, where α is linear thermal expansion coefficient

∆L = Lα∆T = 50(11.8e-6)(35-20) = 0.00885 m

New length = ( 50.000 + 0.00885)m =

New length = 50.00885 m

5 0
3 years ago
Read 2 more answers
In 'coin on card' experiment a smooth card is used. ​
KIM [24]

Answer:

In coin card experiment smooth card is used so that the card can slide easily from glass

5 0
3 years ago
Read 2 more answers
Other questions:
  • In the 1980s, the term picowave was used to describe food irradiation in order to overcome public resistance by playing on the w
    7·1 answer
  • In the presence of a nucleus the energy of a y-ray photon can be converted into an electron-positron pair. Calculate the minimum
    8·1 answer
  • What is the frequency of a wave?
    10·2 answers
  • When one of the two planes of vibration of a light wave is blocked, the resulting wave is called
    15·2 answers
  • A current of 3.6-A flows through a conductor. Calculate how much charge passed through and cross-section of the conductor in 25s
    5·1 answer
  • Discuss the symmetry between the laws of Charles Coulomb and Sir Isaac Newton regarding forces
    14·2 answers
  • Can yall please help!!
    5·1 answer
  • What does the slope of a speed vs time graph means
    11·1 answer
  • Newton's First Law is also called the Law of Inertia. Which of the objects below has the most inertia, the white truck or yellow
    11·1 answer
  • Define briefly what is second conditionofequilibrium with examples​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!