1. You wish to heat 20 kg of water from 40°C to 80°C. How many kcal of heat are necessary to do this? To how many kJ does this correspond?

The isotope cs-137, which has a half life of 30.7 years, is a radioactive product of nuclear power plants. how long will it take for an amount of the isotope to decay to 1/16 of its original amount

A wire carrying a 32.0 A current passes between the poles of a strong magnet such that the wire is perpendicular to the magnet's field, and there is a 2.15 N force on the 3.00 cm of wire in the field.

Which of the following nations had a command economy?

A force of 83 newtons is applied to a wire with a diameter of 0.5 mm. what is the tensile stress (in n/m2) in the wire? do not include units with the answer.

Which of these is a harmful interaction? A Competition B Mutualism C Commensalism D Symbiosis

The law of reflection states that if the angle of incidence is 81 degrees, the angle of reflection is ___ degrees.

Do you mind if I use this example for my assignment?

A squirrel runs along an overhead telephone wire that stretches from the top of one pole to the next. It is initially at position xi=3.37 mxi=3.37 m, as measured from the center of the wire segment. It then undergoes a displacement of Δx=-6.

Imagine a 10 kg block moving with a velocity of 20 m/s to the left. calculate the kinetic energy of this block

Which do you think is the bigger problem among college students-the continued abuse of illegal drugs or the rising abuse of prescription and over-the-counter medications?