To celebrate her upcoming graduation Keysi books a trip on a space party-boat that travels at 99% the speed of light. She tells her mom she'll be "right back" and goes for a 3 day trip around the solar system. If the clocks on her space ship read 3 days, how many days does her mom wait for her to return? * 5 days
9 days
12 days
15 days
21 days
25 days

The transfer of heat through the movement of a gas or liquid a. convection b. conduction c. radiation

Acarpenter builds an exterior house wall with a layer of wood 2.9 cm thick on the outside and a layer of styrofoam insulation 2.3 cm thick on the inside wall surface. the wood has k=0.080w/(m⋅k), and the styrofoam has k= 0.010 w/(m⋅k). the interior surface temperature is 19.0 ∘c , and the exterior surface temperature is -15.0 ∘c . a.)what is the temperature at the plane where the wood meets the styrofoam? celsius b.)what is the rate of heat flow per square meter through this wall? /m^2

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?