Physics, 29.08.2019 16:20 achimajdsjj

The scientific method of determining the age of the solar system
a. uses the detailed record of impacts on the moon to determine the age of the solar system.
b. shows that the age of the solar system is nearly 14 billion years.
c. uses the current surface temperature of the sun and the rate at which this temperature is decreasing.
d. uses measurements of the proportions of various isotopes in meteorites.

Answers: 1

Show answers

Another question on Physics

Physics, 22.06.2019 05:10

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

Answers: 2

Answer

Physics, 22.06.2019 05:30

Astudent pushes on a 20.0 kg box with a force of 50 n at an angle of 30° below the horizontal. the box accelerates at a rate of 0.5 m/s2 across a horizontal floor. what is the value of the normal force on the box? 200 n 243 n 156 n 225 n

Answers: 2

Answer

Physics, 22.06.2019 19:20

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.

Answers: 1

Answer

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

Answer

You know the right answer?

The scientific method of determining the age of the solar system
a. uses the detailed record o...

Questions