Which material is typically used as a thermal insulator? copper
foam
ceramic
aluminum

Which surface feature of the moon is characterized by mountainous areas? terrae craters maria regolith

Explain why electric current cannot exist if a current doesn't have a voltage source.

Assume you measured the mass of the cart to be (500 ± 1) g and the mass of the additional mass you put on the cart to be (500 ± 1) g as well. since the scale you are using in the lab cannot measure objects heavier than 600g you will have to sum up individual pieces and propagate the error. so what would be the mass and the standard error of the cart and the mass