Why is raw sewage a major pollutant in some countries but not in developed countries?

When a river flows into an ocean, it slows down and deposits materials in its alluvial fan/delta

You slide down a steep slide at an amusement park. The slide is set up so that you are sitting on a blanket so that only the blanket is in contact with the slide.

An object of unknown mass m is hung from a vertical spring of unknown spring constant k, and the object is observed to be at rest when the spring has extended by 16 cm. the object is then given a slight push and executes shm. determine the period

When a cup is placed on a table, which force prevents the cup from falling to the ground? gravitational force normal force resistance force tension force

The drag on a 2-m-diameter satellite dish due to an 81-km/hr wind is to be determined through a wind tunnel test using a geometrically similar 0.4-m-diameter model dish. Assume standard air for both model and prototype.

Is 30 minutes to nine the same as 30 minutes after 8 in life

In a car changes its philosophy from 32 km/hour to54 km/hour in 8.0 seconds, what is its acceleration?

Suppose a conducting rod is 52 cm long and slides on a pair of rails at 2.75 m/s. What is the strength of the magnetic field in T if a 8 V emf is induced?

Height of a low earth orbit?

c) What is moment of inertia? How is it defined (write an equation, explaining all the terms) ? What is the parallel axis principle for moment of inertia?