The position-time equation for a certain train is xf = 2.6m + (8.9m/s)7 + (2.5m/s^2)t^2 What is the initial velocity of this train and the acceleration?

The current in a hair dryer measures 11 amps. the resistance of the hair dryer is 12 ohms. what is the voltage?unit:

Use the profile illustrated for problem (1). assume that the layer of silty sand fill (sm) is placed over the entire site. estimate the thickness of the fill (h - in feet) that will cause the effective vertical stress at the center of the clay layer to increase by 517.5 pounds per square foot.

Ascientist wants to test ways to reduce pollution in lake . what is the bestway of doing this