N any ecosystem, the size of a population A. always stays the same. B. only depends on the population's reproductive rate. C. only depends on the amount of resources available. D. may change over time.

A ball having a mass of 0.20 kilograms is placed at a height of 3.25 meters. If it is dropped from this height, what will be the kinetic energy of the ball when it reaches 1.5 meters above the ground?

What occurs when a swimmer pushes through the water to swim?

Unbalanced contact forces between several object would result in?

A car was traveling at 20m/s and slammed on the brakes causing the car to decelerate at a rate of - 2.5 m/s^2 before coming to a stop. What was the distance required for the car to stop? What formula must be used?

A tank contains one mole of carbon dioxide gas at a pressure of 6.70 atm and a temperature of 23.0°C. The tank (which has a fixed volume) is heated until the pressure inside triples. What is the final temperature of the gas?

Find the current Voltage VD and current ID in the following circuit assuming (a) ideal diode. (b) Constant voltage drop model with Von = 0.75V (c) using the exponential model (I_0=1*10^ (-14)). Verify your results through Multisim simulation

Suppose two stars are located in region a of the h-r diagram shown in the figure below. Star X appears much dimmer that Star Y as seen from Earth. Which Star can be inferred to be nearer to Earth, and how do you know?

A student examining a joint observes collagen-rich connective tissue fibers linking the bones, but finds no synovial cavity. Which structural classification fits the observed joint?

How to identify additional materials

Tarzan runs at 6 m/s and grabs a vertical vine (negligible mass) 4.1 m long which is tied to a tree at the top. Tarzan swings up. Determine the maximum height Tarzan will swing up and the angle the vine makes respect to vertical.