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aev [14]
3 years ago
8

Atoms that emit particles and energy from their nuclei are

Physics
1 answer:
saw5 [17]3 years ago
4 0
Atoms that emit particles and energy from their nuclei are (Radioactive).
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Hiện tượng lọc và siêu lọc
STALIN [3.7K]

Answer:

Siêu lọc (UF) là một dạng lọc màng trong đó các lực như áp suất hoặc gradient nồng độ được phân tách thông qua một màng bán thấm. Chất rắn lơ lửng và chất tan có trọng lượng phân tử cao được giữ lại trong cái gọi là retentate, trong khi nước và chất tan có trọng lượng phân tử thấp đi qua màng trong quá trình thẩm thấu (lọc). Quá trình tách này được sử dụng trong công nghiệp và nghiên cứu để tinh chế và cô đặc các dung dịch cao phân tử (103 106 Da), đặc biệt là các dung dịch protein.

Siêu lọc về cơ bản không khác gì vi lọc. Hai điều này khác nhau trên cơ sở loại trừ kích thước hoặc bắt giữ hạt. Điều này về cơ bản khác với sự phân tách khí qua màng, dựa trên tốc độ hấp thụ và khuếch tán khác nhau với số lượng khác nhau. Màng siêu lọc được xác định bằng trọng lượng phân tử (MWCO) của màng được sử dụng. Siêu lọc được thực hiện ở chế độ dòng chảy chéo hoặc dòng chết.

7 0
2 years ago
SI is considered a consistent system because it
nalin [4]
The unit conversion factors are always a power of ten. It is very easy to get different measurements quickly.
6 0
3 years ago
A wire with a resistance of 20 Ω (Ohm's) is connected to a 12-V battery. What is the current flowing through the wire? (Blank) A
pishuonlain [190]
<span>For this particular problem, we use Ohm's Law. This law deals with the relation between voltage and current in an ideal conductor. It states that: Potential difference across a conductor is proportional to the current that pass through it. It is expressed as V=IR. Using the equation, we can isolate I or the current to one side and the other terms to the other side. We calculate as follows:

V = IR
I = V/R
I = 12 V / 20 </span><span>Ω
I = 0.6 amperes

Therefore, the current that is flowing through the wire supplied with 12 V and having a resistance of 20 
</span><span>Ω would be 0.6 amperes.</span>
8 0
3 years ago
Read 2 more answers
Sort the statements based on whether they are correct or incorrect. All waves have the same wavelength. Radio telescopes give us
shutvik [7]

All waves have the same wavelength.

FALSE

All waves may  not be of same frequency because all waves are of different energy levels and energy depends on the frequency which is different.

Radio telescopes give us information about the birthplace of a star.

FALSE

Radio telescope is an astronomical instrument consisting of a radio receiver and an antenna system that is used to detect radio-frequency radiation emitted by extraterrestrial sources.

If the wavelength of a wave increases, its frequency also increases.

FALSE

relation between frequency and wavelength is given as

\nu = \frac{c}{\lambda}

so they are inversely related to each other and hence if wavelength is increased then frequency must have to decrease.

Visible light is a kind of electromagnetic wave.

TRUE

All visible light is a part of electromagnetic waves.

All objects emit electromagnetic waves.

TRUE

Due to thermal vibrations all objects radiate electromagnetic waves of different frequencies.

6 0
3 years ago
Read 2 more answers
13/78 what is the simplest form for
malfutka [58]
13/78 can be the simplest from for almost anything. Just multiply the numerator and the denominator by the same number to find an equivalent fraction of which 13/78 is its simplest form.

Let's multiply it by 2.

13(2) / 78(2) = 26/156

So 13/78 is the simplest from for 26/156 and an infinite number of other fractions!
7 0
3 years ago
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