What are some limitations to your direct observations of your environment? Give an example of an observation that could be made without using an instrument, but would be improved by using one. Give an example of an observation that could not be made without the use of an instrument.

Acrow drops a 0.11kg clam onto a rocky beach from a height of 9.8m. what is the kinetic energy of the clam when it is 5.0m above the ground? what is its speed at that point?

Sound is a disturbance that travels through a medium as a

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.