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When a metal was exposed to light at a frequency of 3.91 1015 electrons were emitted with a kinetic energy of 3.40 101 J. What is the maximum number of electrons that could be ejected from this me?
To determine the maximum number of electrons that can be ejected from the metal, we first need to find the work function (ϕ) using the photoelectric equation (E_k = hf - \phi), where (E_k) is the kinetic energy of the emitted electrons, (h) is Planck's constant ((6.626 \times 10^{-34} , \text{Js})), and (f) is the frequency of the light. Calculating the energy of the incident photons: [ E = hf = (6.626 \times 10^{-34} , \text{Js}) \times (3.91 \times 10^{15} , \text{s}^{-1}) \approx 2.59 \times 10^{-18} , \text{J} ] Next, we can find the work function: [ \phi = hf - E_k = 2.59 \times 10^{-18} , \text{J} - 3.40 \times 10^{-19} , \text{J} \approx 2.25 \times 10^{-18} , \text{J} ] The maximum number of electrons emitted depends on the total energy supplied and the work function, but without further information on the total energy input, we cannot calculate the exact maximum number of electrons that can be ejected.
Is there a way to text someone from a restricted number?
yes there is! just don't text that number
How do you get teletext up on sky?
To access Teletext on Sky, press the "Text" or "Teletext" button on your remote control. This will bring up the Teletext service on your screen where you can navigate using the number keys. You can access news, sports, weather, and other information through the Teletext service.
What is inseration point?
The insertion point is a cursor or marker that shows where new text will be inserted in a document or text field. It indicates the position where any new characters you type will appear.
How many moles there are in 160g of argon atoms?
To find the number of moles of argon in 160 grams, you can use the molar mass of argon, which is approximately 40 g/mol. Using the formula: [ \text{Number of moles} = \frac{\text{mass (g)}}{\text{molar mass (g/mol)}} ] we can calculate: [ \text{Number of moles} = \frac{160 \text{ g}}{40 \text{ g/mol}} = 4 \text{ moles} ] Thus, there are 4 moles of argon in 160 grams.
What is the maximum number of characters a text field can store in Microsoft access?
32,767 characters in a standard text field.
What is text data in access?
The field can contain any characters. A maximum number of 255 characters is allowed in a field whose data type is Text.
What is the maximum field width for a text field in access?
32,767 characters in a standard text field.
In Access text data type contain maximum character of?
In Access, the Text data type can hold up to 255 characters. If you need to store more characters, you can use the Memo data type, which can store up to 65,535 characters.
The maximum number of characters allowed in a field whose data type is text is 1024?
255 max for text
What is the maximum number of text items you can join into a single text item using concatenate function?
You can have up to 255 items, up to a total of 8,192 characters.
What is the maximum number of text items that you can join into a single text item using the concatenate function?
You can have up to 255 items, up to a total of 8,192 characters.
What is the maximum field width for a text field?
255 characters.
How many characters are allowed in a data type of text?
The maximum number of characters allowed in a text data type varies depending on the database system being used. For example, in MySQL, the maximum length is 65,535 characters, while in PostgreSQL, it is unlimited (1GB). It's important to check the specific documentation of the database system to determine the exact limits.
What data type can store up to 255 characters in Access?
Text.Text.Text.Text.Text.Text.Text.Text.Text.Text.Text.
When using Microsoft Access what is the default field size for a text field?
for 2003? i believe it is 255 characters. not positive though... (I use Access quite a bit, however, I am still not sure of that number)
Difference between number and text type field in ms access?
This is true in any database (Access, Oracle). A number field is technically called a "NUMERIC" field. Only numbers can be inserted into a field that has this designator. A text field is for characters or numbers. It can be a "CHAR" (character), a VARCHAR (characters or numbers). It's basically a way of putting rules on columns--what type of data belongs there.
