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3 years ago

Repulsion is the sure way to test magnetism.Why?

Physics

1 answer:

jeyben [28]3 years ago

8 0

Answer:

Repulsion is the sure test for magnetism because it occurs only when two like poles of a magnet exist while the attraction phenomenon can occur between two unlike poles of a magnet and also between a magnet and a magnetic material means if there are two magnets they will attract each other and suppose if one material

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Plants may get yellow if they get less nitrogen.give reasons.

Vaselesa [24]

Explanation:

Nutrient deficiency causes yellowing of leaves. One of such nutrient is Nitrogen.

Leaves are green because of a pigment in them called chlorophyll.
The chlorophyll in leaves are used by plant to absorb light energy needed for photosynthesis.
Other wavelength of light is absorbed by the chlorophyll and the green color is reflected.
Nitrogen is an important nutrient that is needed to produce chlorophyll in plants which in turn helps the process of photosynthesis.

Learn more;

Photosynthesis brainly.com/question/2761166

#learnwithBrainly

5 0

4 years ago

What’s the answer to this question

alexgriva [62]

Answer:

space = 66.24 [m]

Explanation:

To solve this problem we must remember that the average speed is defined as the relationship between a space traveled over a certain time.

$Av = \frac{space}{time}$

where:

space [m]

Av = average velocity = 3.6 [m/s]

time = 18.4 [s]

$space = 3.6*18.4\\space = 66.24 [m]$

7 0

3 years ago

A comet is in an elliptical orbit around the Sun. Its closest approach to the Sun is a distance of 4.7 1010 m (inside the orbit

Lubov Fominskaja [6]

Answer:

58515.9 m/s

Explanation:

We are given that

$d_1=4.7\times 10^{10} m$

$v_i=9.5\times 10^4 m/s$

$d_2=6\times 10^{12} m$

We have to find the speed (vf).

Work done by surrounding particles=W=0 Therefore, initial energy is equal to final energy.

$K_i+U_i=K_f+U_f$

$\frac{1}{2}mv^2_i-\frac{GmM}{d_1}=\frac{1}{2}mv^2_f-\frac{GmM}{d_2}$

$\frac{1}{2}v^2_i-\frac{GM}{d_1}+\frac{GM}{d_2}=\frac{1}{2}v^2_f$

$v^2_f=2(\frac{1}{2}v^2_i-\frac{GM}{d_1}+\frac{GM}{d_2})$

$v_f=\sqrt{2(\frac{1}{2}v^2_i-\frac{GM}{d_1}+\frac{GM}{d_2})}$

Using the formula

$v_f=\sqrt{v^2_i+2GM(\frac{1}{d_2}-\frac{1}{d_1})}$

$v_f=\sqrt{(9.5\times 10^4)^2+2\times 6.7\times 10^{-11}\times 1.98\times 10^{30}(\frac{1}{6\times 10^{12}}-\frac{1}{4.7\times 10^{10})}$

Where mass of sun= $M=1.98\times 10^{30} kg$

$G=6.7\times 10^{-11}$

$v_f=58515.9 m/s$

4 0

3 years ago

Who ever gets it right I will give Brainly and 20 points.

svetlana [45]

Answer:

Explanation:

3 0

2 years ago

Read 2 more answers

Explain how water freezing and thawing causes weathering and the type of weathering it would be considered.

Nikitich [7]

Answer: Physical weathering is caused by the effects of changing temperature on rocks, causing the rock to break apart. The process is sometimes assisted by water. Freeze-thaw occurs when water continually sleeps into cracks, freezes and expands, eventually breaking the rock apart.

3 0

3 years ago

Repulsion is the sure way to test magnetism.Why?​

Repulsion is the sure way to test magnetism.Why?