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grandymaker [24]
4 years ago
6

What are some materials that organisms get from their environment

Physics
2 answers:
sweet [91]4 years ago
6 0
Food from animals, water from lakes rivers oceans and precipitation of rainwater, sunlight(for plants) and oxygen from air to breathe(or plants to go through photosynthesis).
Scrat [10]4 years ago
5 0
I don't know I really need to get my homework done so have a nice day
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What type(s) of energy is/are contained in a roller coaster car after it has come to a complete stop at the station? A. kinetic
blondinia [14]

Answer:

I think it is just potential

Explanation:

If it’s right pls mark the brainliest

7 0
3 years ago
What unit is used to express work?
MAXImum [283]
The unit to express work is called Joule.
4 0
3 years ago
A 1.50 m cylindrical rod of diameter 0.550 cm is connected to a power supply that maintains a constant potential difference of 1
Tema [17]

Answer:

α = 1.114 × 10⁻³ (°C)⁻¹

Explanation:

Given that:

Length of rod (L) = 1.5 m,

Diameter (d) = 0.55 cm,

Area (A) = \pi r^2

Radius (r) = d / 2 = 0.275 cm,

Voltage across the rod (V) = 15.0 V.

At initial temperature (T₀) = 20°C, the current (I₀) = 18.8 A while at a temperature (T) = 92⁰C, the current (I) = 17.4 A

a) The resistance of the rod (R) is given as:

R=\frac{Voltage(V)}{I_0} \\R=\frac{15}{18.8}=0.798\Omega

Therefore the resistivity and for the material of the rod at 20 °C (ρ) is:

\rho=\frac{RA}{L}=\frac{0.798*\pi *0.275^2}{1.5}=0.126\Omega m  

b) The temperature coefficient of resistivity at 20°C for the material of the rod (α) can be gotten from the equation:

R_T=R_0[1-\alpha (T-T_0)]\\but,R_T=\frac{V}{I}=\frac{15}{17.4}=0.862\\

Rearranging to make α the subject of formula:

\frac{R_T}{R_0} =1+\alpha (T-T_0)\\\alpha (T-T_0)=\frac{R_T}{R_0}-1\\\alpha =\frac{\frac{R_T}{R_0}-1}{(T-T_0)} \\Substituting:\\\alpha =\frac{\frac{0.862}{0.798}-1 }{92-20} \\\alpha =\frac{0.0802}{72} =1.114*10^-3(^0C)^{-1

8 0
3 years ago
Hang two sheets of paper vertically from adjacent corners. The sheets should be parallel and close to each other with a small ga
Liula [17]

Answer:

The sheets move toward each other and the gap narrows                      

Explanation:

          When two sheets are arranged or hanged in such a way, there is a small gap in between the two parallelly hanging sheets. This gap is filled by the surrounding air.

          Now if we blow gently in between the gap of the two sheets, we will observe that the two sheets move towards each other and will come closer thereby narrowing the gap in between them.  

          This is because as we blow through the gap, partial vacuum is created in between the sheet for a short time. So this vacuum is filled by the air surrounding the two sheets thereby forcing the two sheets closer.

7 0
3 years ago
What is the current through the battery
Mars2501 [29]

When a battery is connected to a circuit, the electrons from the anode travel through the circuit toward the cathode in a direct circuit. The voltage of a battery is synonymous with its electromotive force, or emf. This force is responsible for the flow of charge through the circuit, known as the electric current.

6 0
3 years ago
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