The heat for melting or freezing water, also called the Heat of Fusion (Hf), is 80 calories per gram at 0Â°C, which is the equilibrium temperature. In other words, it is necessary to add 80 calories of energy to melt one gram of ice at 0Â°C.
The CVV Number (Card Verification Value) on your credit card or debit card is a 3 digit number on VISAÂ®, MasterCardÂ® and DiscoverÂ® branded credit and debit cards. On your American ExpressÂ® branded credit or debit card it is a 4 digit numeric code.
If the creditCardField option is set, the validator will check if the CVV number is suitable with the credit card number of not. In the details, the American Express card only accepts 4 digits CVV number, while other cards only accept 3 digits CVV number. Example. The following form also validates the CVV number based on the credit card number.