This is stands for "held for ICE," which stands for immigrations and customs enforcement.
hf is the energy of photons incident on the surface
No. Hf is hafnium. HF is hydrofluoric acid. Capitalization matters when writing chemical formulas.
Capitalization matters in chemistry. Hf (uppercase H, lowercase f) is the element known as hafnium. HF (both letters uppercase) is the compound known as hydrogen fluoride.
I believe it means "High Frequency".
The m stands for mass and Hf stands for heat of fusion.
Hf stands for Hafnium. Hafnium is in Group 4 (4 valence electrons) and Period 6
HF is hydrogen fluoride.
where liquid Hf is used
Skövde HF was created in 1949.
HF Bieling was born in 1887.
HF Bieling died in 1964.
Luleå HF was created in 1977.