Physics, 17.01.2020 00:31 rosenthaljaneiah2010
What type of country is described by low birth rates, lower infant mortality rates, and longer life expectancy?
a. developed country
b. transitional country
c. developing country
d. preindustrial country
what would happen to a population of rabbits if their predators disappeared?
a. the rabbit population would grow.
b. the rabbit population would decline.
c. the rabbit population would stay the same size.
d. the rabbits would get a disease.
what was a contributing factor to the environmental problems during the 1960s?
a. population increase
b. population decrease
c. increased agriculture
d. decrease in industry
what type of organism is a dolphin?
a. autotroph
b. heterotroph
c. producer
d. decomposer
what type of wild animal is it safe to feed or approach?
a. a rabbit
b. a wolf
c. a snake
d. never approach an unknown animal
Answers: 3
Physics, 22.06.2019 09:00
The pressure proportional to the area a- inversely b- directly c- increase d-decrease
Answers: 2
Physics, 22.06.2019 19:50
The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.
Answers: 3
Physics, 22.06.2019 22:30
Materials will have different energies associated with the electrons inside them. this is related to how strongly bound they are by their work function. if we sandwich a material with a very low energy between two materials with a high energy, we create a trap for an electron. if this trap is very narrow in one direction in comparison to the others, this is approximately a 1-dimensional box that confines the electron. what is the lowest energy of an electron in the box if the thinnest direction across the materials is 4.81 nm?
Answers: 3
Physics, 23.06.2019 02:00
Elements on the periodic table are ordered according to their
Answers: 1
What type of country is described by low birth rates, lower infant mortality rates, and longer life...
English, 20.09.2020 17:01
English, 20.09.2020 17:01
Geography, 20.09.2020 17:01
Computers and Technology, 20.09.2020 17:01
Social Studies, 20.09.2020 17:01
Mathematics, 20.09.2020 17:01
Computers and Technology, 20.09.2020 17:01
Computers and Technology, 20.09.2020 17:01
Biology, 20.09.2020 17:01
Mathematics, 20.09.2020 17:01
Mathematics, 20.09.2020 17:01