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
alisha [4.7K]
4 years ago
11

2. Tony sets up an experiment inside his classroom. He spaces 5 plants at equal

Physics
2 answers:
motikmotik4 years ago
7 0
A bug is water just like
A cup
brilliants [131]4 years ago
4 0

Answer:

a

Explanation:

You might be interested in
You are a member of an alpine rescue team and must get a box of supplies, with mass 3 kg , up an incline of constant slope angle
denis23 [38]

Answer:

v = 9.04 m / s

Explanation:

For this exercise we can use the relation that the work of the non-conservative force (friction) is equal to the variation of the mechanical energy of the system.

          W = Em_f - Em₀         (1)

Starting point. Lower slope

        Em₀ = K = ½ m v²

highest point. Where is the skier at a height h

        Em_f = U = m g h

The work of rubbing

        W = -fr x

the negative sign is because the friction force opposes the movement.

Let's set a reference system where the x axis is parallel to the slope and the y axis is perpendicular

let's use trigonometry to break down the weight

        cos θ = W_y / W

        sin θ = Wₓ / W

        W_y = W cos θ

        Wₓ = W sin θ

Y axis

        N - Wₓ = 0

        N = mg sin  θ

X axis

         fr = m a

the friction force has the expression

         fr = μ N

         fr = μ mg sin θ

we look for the job

         W = - μ mg sin θ  x

where x is the distance along the slope

       

we substitute in 1

         -μ mg sin θ x = mg h - ½ m v²

let's use trigonometry to find the distance x

        tan 30 = h / x

        x = h / tan 30

we substitute

          -   \mu \ mg \ sin \theta \  \frac{h}{tan 30} \ x = m gh - ½ m v²

we use  

          tan 30 = sin30 / cos30

         

          v² = 2g h + 2 μ g h cos 30

          v = \sqrt{ 2gh \ (1+ cos 30}

let's calculate

          v = \sqrt{ 2 \ 9.8 \ 4 \ (1 + 0.05 \ cos \ 30)}

          v = 9.04 m / s

4 0
3 years ago
Explain the difference between a conductor and an insulator. Give two examples of each.
docker41 [41]
There are different kinds of conductors, most notably electrical and thermal conductors. But they are often inclusive of each other (electrical conductors are typically good thermal conductors). A conductor transmits something through its body with high efficiency while an insulator does not transmit very well. In the case of electricity, a conductor transmits electrical energy between two points while an insulator blocks the flow of electricity. Two examples of conductors are copper and silver. Two examples of insulators are wood and styrofoam.
3 0
3 years ago
The age of a piece of wood from an archeological site is to be determined using the Carbon-14 method. The activity of the sample
Bond [772]

Answer:

4276.98 years

Explanation:

t = age of the sample in numbers of years

T = half life of the carbon-14 isotope = 5730 yrs

λ = decay constant of carbon-14

decay constant is given as

\lambda =\frac{0.693}{T}

\lambda =\frac{0.693}{5730}

\lambda = 0.000121

A₀ = activity of Carbon-14 in living plants

A  = activity of Carbon-14 after time "t" = (0.596) A₀

Using the equation

A = A_{o} e^{-\lambda t}

(0.596) A₀  = A_{o} e^{-0.000121 t}

0.596 = e^{-0.000121 t}

t = 4276.98 years

4 0
3 years ago
What voltage (potential difference)must be applied to a 26 1
12345 [234]

Answer:

26v

....................

3 0
3 years ago
When two oppositely charged electrodes are immersed in a solution, positively charged ions are attracted to the negative electro
e-lub [12.9K]

Answer:

conductivity of solution is reduced.

Explanation:

When two oppositely charged electrodes are immersed in a solution, positively charged ions are attracted to the negative electrode and gain electrons. The negatively charged ions are attracted to the positive electrode and release electrons.

Due to the process mentioned above , the negatively charged ions are accumulated at the positive electrode and the positively charged ions are accumulated at the negative electrode . This accumulation prevents further attraction of ions at oppositely charged electrodes because the incoming ions face repulsion from already accumulated ions at electrodes.  Further , it creates an emf acting in opposite direction . It reduces the current through the solution. Hence conductivity of solution is reduced.

5 0
3 years ago
Other questions:
  • Which of the following questions best highlights a shortcoming of the big bang theory?
    8·2 answers
  • What's the relationship between geology and the biosphere
    9·1 answer
  • Which statement best describes perigee?
    6·1 answer
  • In a women's 100-m race, accelerating uniformly, Laura takes 1.82 s and Healan 3.07 s to attain
    9·1 answer
  • A circuit contains three resistors connected in parallel. The value of R1 is 2 K , the value or R2 is 6 K , and the value of R3
    8·1 answer
  • A tow rope will break if the tension in it exceed 1500N. It is used to tow a 600 kg car along level ground. What is the largest
    6·1 answer
  • PLEASE ASAP ILL GIVE BRAINLIEST.
    14·1 answer
  • A golfer wants his shot to land
    11·1 answer
  • What would happen if you use a thicker wire around the iron nail of an electromagnet? (thats the whole question)
    15·1 answer
  • 15 POINTS PLZ HELP<br> please look at the images below
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!