An insulated lunch bag keeps food warm by
a) increasing the thermal energy of the lunch bag.
b) increasing the thermal energy of the food.
c) slowing the transfer of thermal energy from the air outside the bag to the food inside the bag.
d) slowing the transfer of thermal energy from the food inside the bag to the air outside the bag.

Very large accelerations can injure the body, especially if they last for a considerable length of time. one model used to gauge the likelihood of injury is the severity index ( ), defined as =/ . in the expression, is the duration of the accleration, but is not equal to the acceleration. rather, is a dimensionless constant that = the number of multiples of that the acceleration is equal to.in one set of studies of rear-end collisions, a person's velocity increases by 13.7 km/h with an acceleration of 36.0 m/s2 . let the + direction point in the direction the car is traveling. what is the severity index for the collision?

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good

If a simple machine reduces the strength of a force, what must be increased?