A large block of mischmetal, a mixture of lanthanum, cerium, and a few other random rare earths. Blocks like this are used for spark effects in movies. It is incredibly sparky stuff, here I'm holding it up to a small grinding wheel. The Spin and Rotate videos show this in action.
Dan The Produce Man from Dan's Fresh Produce in Alameda, CA tells us how we can keep lettuce fresh for 3 to 4 weeks in the refrigerator. Dan The Produce Man from Dan's Fresh Produce in Alameda, CA tells us how we can keep lettuce fresh for 3 to 4 weeks in the refrigerator. Category Entertainment
How long can you keep a salad that has mayonnaise in it? If kept in a refrigerator in a closed container, I'd say about 2 weeks until the lettuce or mayo goes bad.oods that are left out in room temperature for more than an hour can begin bacteria growth. Our stomach acids can kill some of these bacterias but not all and some can make you very sick. Keep foods OUT of the danger zone-Above 45 degrees and Below 145 degrees.