Which of the following is a reason scientists use models?
to explain natural phenomena
to stu...
Which of the following is a reason scientists use models?
to explain natural phenomena
to study the essential variables in a modeled system
to demonstrate relationships
to collect accurate measurement data from a natural system
to cause changes in a natural ecosystem and watch the response
Answers: 3
Physics, 21.06.2019 22:00
Why do electron microscopes have higher resolving power than light microscopes?
Answers: 1
Physics, 22.06.2019 02:00
Figure 9 on page 362 shows various motions of balls. the curved path followed by the yellow ball in b in picture b is result of a) inertia b) centripetal motion c) gravity and horizontal velocity d) linear motion
Answers: 3
Physics, 22.06.2019 12:30
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.
Answers: 1
Physics, 22.06.2019 12:30
An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above
Answers: 3
Biology, 01.04.2021 18:10
Mathematics, 01.04.2021 18:10
English, 01.04.2021 18:10
English, 01.04.2021 18:10
History, 01.04.2021 18:10
Chemistry, 01.04.2021 18:10
Mathematics, 01.04.2021 18:10