Question 1 all of the following are possible sources of error in a scientific investigation except for a completing multiple trials during an experiment. b discovering new variables as the experiment proceeds. c not controlling all the variables in an experiment. d using the wrong equipment during the experiment.

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.

What is a view of science and psychology that says the value of knowledge depends on its usefulness? a. pragmatism b. psychotherapy c. physiology