What are some of the causes that disrupt the natural balance of the ecosystem?

removing predators by hunting

overpopulation of predators

breeding hybrid plants

removing prey by transplantation

ridding the soil of decomposers

The weight of an objects can be calculated by multiplying mass by

What are the Higher Heating Values (BTU/lb) of each fuel below: a. Gasoline b. No. 1 diesel c. No. 2 diesel d. Ethanol e. Methyl Soyate

In 1985, during the construction of a skyscraper in Austin, Texas, the remains of a mastodon were unearthed. If only 1/64 of the original carbon-14 remained, and carbon-14 has a half life of 5730 years, approximately how old were the mastodon bones?

Steam enters a counterflow heat exchanger operating at steady state at 0.07 MPa with a specific enthalpy of 2431.6 kJ/kg and exits at the same pressure as saturated liquid. The steam mass flow rate is 1.5 kg/min.

a 0.10kg piece of copper at an initial temperature of 95C is dropped into 0.20kg of water contained in a 0.28kg aluminum calorimeter. the water and calorimeter are initially at 15C.

Which would cause the largest increase in a mountain climber's gravitational potential energy?

A record of travel along a straight path is as follows: 1. Start from rest with constant acceleration of 2.60 m/s2 for 11.0 s. 2. Maintain a constant velocity for the next 2.60 min. 3. Apply a constant negative acceleration of - 9.38 m/s2 for 3.

What do we get when two sound waves of slightly different frequencies interfere with each other?

You are standing in a moving bus, facing forward, and you suddenly fall forward as the bus comes to an immediate stop. The force acting on you that causes you to fall forward is A) the normal force due to your contact with the floor of the bus.

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position.