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3 years ago

In how many food chains do plants appear

2 answers:

Volgvan3 years ago

5 0

Plants are generally the producer, and is one of the building block foundations of a food chain/web. Without plants, there would be no herbivores, omnivores, carnivores, or decomposers.

So your answer is all of the food chains

hope this helps

slava [35]3 years ago

3 0

All food chains

hope this helps

AND please mark someone brainliest

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4. The greater the speed of gas particles in a container, the:

GREYUIT [131]

Answer:

The answer to your question will be d) greater the pressure

Explanation:

5 0

3 years ago

Read 2 more answers

In a photoelectric effect experiment, electrons emerge from a copper surface with a maximum kinetic energy of 1.10 eV when light

Sladkaya [172]

Answer:A) 220 nm

Explanation:

Given

Maximum Kinetic Energy $K.E.=1.10 eV$

Work Function $W=4.65 eV$

from Einstein Equation

$h\mu =W+K.E.$

$h\cdot \frac{c}{\lambda }=W+K.E.$

$h\cdot \frac{c}{\lambda }=4.65+1.10$

$6.626\times 10^{-34}\cdot \frac{3\times 10^8}{\lambda }=5.75$

$1 eV=1.6\times 10^{-19} J$

thus $5.75 eV=9.2\times 10^{-19} J$

$\lambda =\frac{6.626\times 10^{-34}\time 3\times 10^8}{9.2\times 10^{-19}}$

$\lambda =216.06 nm\approx 220 nm$

6 0

4 years ago

Like pole of magnet ----------each other

Lady_Fox [76]

Answer:

repeal each other......

8 0

3 years ago

An unstrained horizontal spring has a length of 0.40 m and a spring constant of 340 N/m. Two small charged objects are attached

Hatshy [7]

Answer:

(a) Both the charges are positive or negative.

(b) Teh value of each charge is 1.53 x 10^-5 C.

Explanation:

Spring constant, K = 340 N/m

Natural length, L = 0.4 m

stretch, y = 0.033 m

(a) Let the charge on each sphere is q and they repel each other so the nature of charge of either sphere may be both positive or both negative.

(b) The electrostatic force is balanced by the spring force.

$\frac{kq^2}{(L + y)^2}=Ky\\\\\\\frac{9\times 10^9 q^2}{(0.4 +0.033)^2} = 340\times0.033\\\\q= 1.53\times 10^{-5} C$

6 0

3 years ago

Rank the gravitational forces exerted on the Earth by the following objects.

bonufazy [111]

Answer:

Explanation:

According to newton's law of gravitation , equal force of attraction are applied on two masses m₁ and m₂ placed at distance d . This force is given by the expression

F = G m₁ m₂ / d²

If one of the masses be earth with mass M then d = radius of earth R

Force F = G Mm₁ / R²

this force is applied on both the earth and mass m₁ in equal magnitude and in opposite direction.

In the formula F is proportional to m₁

among the given objects in the question , m₁ of object varies in the following order.

skyscraper > car > human being > basket ball

So Force F on the earth by them will also vary in the same order.

8 0

3 years ago