Answer:
Explanation:
= 4190 J/kg.K
= 910 J/Kg. K
= 1.50 kg
= 1.80 kg
ΔT + 
ΔT
= (1.50)(910)(85.0-20)+(1.80)(4190)(85.0-20)
= 578,955 J
= 579 kJ
Answer: B. The gravitational field strength of Planet X is Wx/m.
Explanation:
Weight is a force, and as we know by the second Newton's law:
F = m*a
Force equals mass times acceleration.
Then if the weight is:
Wx, and the mass is m, we have the equation:
Wx = m*a
Where in this case, a is the gravitational field strength.
Then, isolating a in that equation we get:
Wx/m = a
Then the correct option is:
B. The gravitational field strength of Planet X is Wx/m.
Answer:
During charging by conduction, both objects acquire the same type of charge. If a negative object is used to charge a neutral object, then both objects become charged negatively. ... In this case, electrons are transferred from the neutral object to the positively charged rod and the sphere becomes charged positively.
Answer:
1. Ptolemy.
2. Nicolaus Copernicus.
3. Tycho Brahe
4. Galileo Galilei
5. Isaac Newton
6. William Herschel
7. Johann Galle
8. Clyde Tombaugh
9. Albert Einstein.
10. Edwin Hubble
11. Karl Jansky.
12. Grote Weber.
Explanation:
1. Ptolemy: said sun revolved around earth.
2. Nicolaus Copernicus: aid earth revolved around sun.
3. Tycho Brahe: analyzed motions of planets.
4. Galileo Galilei: first used refracting telescope for astronomy.
5. Isaac Newton: invented reflecting telescope.
6. William Herschel: discovered the planet Uranus.
7. Johann Galle: discovered the planet Neptune.
8. Clyde Tombaugh: discovered the dwarf planet Pluto.
9. Albert Einstein: developed special and general theories of relativity.
10. Edwin Hubble: demonstrated that universe is expanding.
11. Karl Jansky: discovered radio waves from the center of the Milky Way.
12. Grote Weber: an amateur astronomer who built the first radio telescope.
