Snowboarding cautiously down a steep slope at a speed of 5.3 m/sec, sarah, whose mass is 53.0 kilograms, is afraid she won't have enough speed to travel up a slight uphill grade ahead of her. she extends her hand as her friend trevor, having a mass of 100 kilograms is about to pass her traveling at 16 m/sec. if trevor grabs her hand, calculate the speed at which the friends will be sliding.

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?

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.

Which radioisotope is used in dating geological formations?