Physics, 12.07.2019 07:30 julissa848
What is the angle of reflection? question 3 options: the angle that the incident ray makes with a line drawn perpendicular to the reflecting surface the angle the reflecting surface makes with the ground the angle that the reflected ray makes with a line drawn perpendicular to the reflecting surface the angle that the reflected ray makes with the incident ray
Answers: 1
Physics, 22.06.2019 11:30
Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?
Answers: 2
Physics, 22.06.2019 14:20
What are the starting materials for nuclear fission? two small nuclei two large nuclei a neutron and a large nucleus a neutron and a small nucleus
Answers: 2
Physics, 23.06.2019 06:30
What surface does the epithelial tissue cover? a. the surface of the body b. lines internal organs c. forms many glands d. all of the above
Answers: 3
Physics, 23.06.2019 08:00
Athin electrical heater is inserted between a long circular rod and a concentric tube with inner and outer radii of 20 and 40 mm. the rod (a) has a thermal conductivity of ka = 0.15 w/(m*k), while the tube (b) has a thermal conductivity of kb = 0.8 w/(m*k) and its outer surface is subjected to convection with a fluid of temperature t= -15°c and heat transfer coefficient 60 w/(m2 *k). the thermal contact resistance between the cylinder surfaces and the heater is negligible. (a) determine the electrical power per unit length of the cylinders (w/m) that is required to maintain the outer surface of cylinder b at 15°c. (b) what is the temperature at the center of cylinder a?
Answers: 2
What is the angle of reflection? question 3 options: the angle that the incident ray makes with a...
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