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3 years ago

A sunflower turns its head toward sunlight. What triggers this behavior in a sunflower?

1 answer:

7 0

This is triggered by an activity known as heliotropism, or solar tracking. Special motor cells at the bases of the flowerbuds shrink or enlarge as they absorb water, which moves their faces toward the sun.

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Three very small spheres of mass 2.50 kg, 5.00 kg, and 8.00 kg are located on a straight line in space away from everything else

Aliun [14]

Answer:

The net gravitational force it exerts is $F_{net}=9.66*10^{-8}N$

Explanation:

Newton's Law of Gravitation can be written as

$F=\frac{Gm_{1}m_{2}}{r^{2} }$

where G is the Gravitational Constant, m1 and m2 are the masses of two objects, and r is the distance between them. In this case, the spheres are loacted in straight line, so instead of a vector r, we have a distance x in meters. The distances and masses are given in the problem, and the smaller sphere is between the other two spheres. This means the sphere 1 is in the middle, the sphere 2 is on the left of 1, and the sphere 3 is on the right of 1, so

$F_{21} =\frac{Gm_{1}m_{2}}{x_{21}^{2} }$ is the force that 2 feels because of 1, and

$F_{31} =\frac{Gm_{1}m_{3}}{x_{31}^{2} }$ is the force that 3 feels because of 1.

If we replace the data in those previous equations, we have that

$F_{21} =\frac{G(2.5)(5) }{(0.08)^{2} }=1.3*10^{-7}N$

$F_{31} =\frac{G(2.5)(8) }{(0.2)^{2} }=-3.34*10^{-8}N$

Finally, adding both results, the net force the sphere 1 exerts is

$F_{net}=9.66*10^{-8}N$

6 0

3 years ago

the density of gas is 1.775kg/m^3 at 27 degree celcius and pressure of 10^-5n/m^2. if the specific heat capacity at constant pre

MrRissso [65]

Answer:

76.52

Explanation:

5 0

2 years ago

A motorboat accelerates uniformly from a velocity of 6.5 m/s to the west to a velocity of 1.5 m/s to the west. If its accelerati

monitta

Answer:

The displacement of the boat is 7.41 m

Explanation:

Given;

initial velocity of the motorboat, u = 6.5 m/s west

final velocity of the motorboat, v = 1.5 m/s west

acceleration of the motorboat, a = -2.7 m/s² east

The displacement of the boat is given by;

v² = u² + 2ad

where;

d is the displacement of the motorboat

1.5² = 6.5² + 2(-2.7)d

1.5² - 6.5² = -5.4d

-40 = -5.4d

d = (40) / 5.4

d = 7.41 m

Therefore, the displacement of the boat is 7.41 m

6 0

4 years ago

What is semiconductor device that produces electric current through the effect for which its named?

nlexa [21]

The semiconductor device that produces electric current through the effect is termed as transistor.

To find the answer, we have to know more transistor.

<h3>What is transistor?</h3>

Transistors come in two different types: field-effect transistors and bipolar junction transistors.
The formation of two p-n junctions in various configurations, such as n-p-n or p-n-p, results in bipolar junction transistors.
The emitter, collector, and base, or middle region, are the three areas that form in a transistor.
The conductivity of the field-effect transistor, which is based on the conductivity principle, can be changed by an electric field.

Thus, we can conclude that, the semiconductor device that produces electric current through the effect is termed as transistor.

Learn more about transistor here:

brainly.com/question/1345827

#SPJ4

6 0

2 years ago

In an a.c generator, there are rings used. What are there names and how are they adapted to reversing current.

djyliett [7]

Answer:

In an a.c generator, slip rings are used.

Adaptation: They are not directly connected directly to carbon brushes, hence donot come into contact when the rectangular coil rotates.

Explanation: