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3 years ago

Which statement describes Redi’s experiment, which helped disprove spontaneous generation?

Physics

2 answers:

Kay [80]3 years ago

5 0

Answer:

He examined covered and uncovered meat to determine that maggots came from eggs.

In other other words A

Flura [38]3 years ago

3 0

Answer:

Explanation:

;) 1

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Four electrons are located at the corners of a square 10.0 nm on a side, with an alpha particle at its midpoint.

dimulka [17.4K]

The work done by the Coulomb force will be " $6.08\times 10^{-21} \ J$ ".

Let us define the required work done to move that alpha particle to the one of the mid point of the side length as follows.

→ $W = \frac{4kqQ}{r_1} -(\frac{2kqQ}{r_2} +\frac{2kqQ}{r_3} )$

→ $=2kqQ(\frac{2}{r_1} -\frac{1}{r_2} -\frac{1}{r_3} )$

→ $=2(8.99\times 10^9)(-1.6\times 10^{-19})(2)(1.6\times 10^{-19})$

→ $= (\frac{2}{\sqrt{(5\times 10^{-9})^2+(5\times 10^{-9})} } -\frac{1}{(5\times 10^{-9})} -\frac{1}{\sqrt{(10\times 10^{-9})^2} +(5\times 10^{-9})^2} )$

→ $= 6.08\times 10^{-21} \ J$

Thus the above answer is appropriate.

Learn more about work done here:

brainly.com/question/24716770

3 0

2 years ago

Choose the sources of gamma rays. Check all that apply.

harina [27]

Answer:

a. Stars all warm objects

c. Some unstable atomic nuclei

Explanation:

Gamma rays are photons of very high energy (beyond 100keV) enough to remove an electron from its orbit.

They have a very short wavelength, less than 5 meters from the peak, and can be produced by nuclear decay, especially in the breasts of massive stars at the end of life.

They were discovered by the French chemist Paul Villard (1860 to 1934).

While X-rays are produced by electronic transitions in general caused by the collision of an electron with an atom at high speed, gamma rays are produced by nuclear transitions.

Gamma rays produce damage similar to those caused by X-rays or ultraviolet rays (burns, cancer and genetic mutations).

The sources of gamma rays that we observe in the universe come from massive stars (hypernovas) or some warm objects on the space that end their lives by a gravitational collapse that leads to the formation of a neutron star or a black hole, as well as unstable radioactive nuclei that emit radiation gamma to reach its steady state.

7 0

4 years ago

If you pluck a guitar string hard the sound waves it gives off will have __________ amplitudes.

Ilia_Sergeevich [38]

Answer:

large

Explanation:

the harder you pluck the louder it gets

4 0

3 years ago

Read 2 more answers

Runaway truck ramps are common on mountainous highways in case the brakes fail on large trucks. If a

dusya [7]

Answer:

$W=-21,870,000\ J$

Explanation:

Work and Kinetic Energy

The work an object does due to its motion is equal to the change of its kinetic energy. Being ko and k1 the initial and final kinetic energy respectively and m the mass of the object, then

$W=\Delta k=k_1-k_0$