When an object is in orbit, it is falling at the same rate at which the Earth is curving. Please select the best answer from the choices provideda. True
b. False

Answers

Answer 1

Answer:

The statement “When an object is in orbit, it is falling at the same rate at which the Earth is curving” is true. The speed of a satellite orbiting the earth depends only on the mass of the earth and the mass of the satellite.

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The chemical symbol for sulfuric acid is H2SO4. How many atoms are contained in each molecule of sulfuric acid?
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PLZ EXPLAIN THE EQUATION AND I WILL GIVE BRAINLIST You are out and about in the country and your father sees a rock that he really wants in the yard. Now you must get the very heavy rock into the back of a truck. The truck bed is 3 feet off the ground. Your father pulls out a 5-foot plank and begins to set up a ramp. At the same time, you (who know about mechanical advantage!) have found a plank that is 8 feet long, and you show it to your father. Which plank will give you the most mechanical advantage? Calculate the MA for each plank

Answers

Answer:

The 8 foot long plank

Explanation: hope this helps :)

What happens to an earthquake's S-waves when they strike the core?A) They bounce off
B) They are absorbed
C) The change into P-waves
D) They change into L-waves

Answers

Answer:

B) They are absorbed

Explanation:

B is correct because S waves can only travel through solid materials. When they hit liquid materials they are absorbed in and undetectable.

Answer:

B) They are absorbed

Explanation:

When they hit the liquid core, S-waves are no longer able to be detected. While P-waves bounce off the liquid core, S-waves are absorbed at the core.

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the melting of ice, and explain your predictions. How does temperature affect the spontaneity of this process?

Answers

Melting of ice is an endothermic process, meaning that energy is absorbed. When ice spontaneously melts, ΔH (change in enthalpy) is "positive". ΔS (entropy change) is also positive, because, becoming a liquid, water molecules lose their fixed position in the ice crystal, and become more disorganized. ΔG (free energy of reaction) is negative when a reaction proceeds spontaneously, as it happens in this case. Ice spontaneously melts at temperatures higher than 0°C. However, liquid water also spontaneously freezes at temperatures below 0°C. Therefore the temperature is instrumental in determining which "melting" of ice, or "freezing" of water becomes spontaneous. The whole process is summarized in the Gibbs free energy equation:
ΔG = ΔH – TΔS

Answer:

Explanation:

H2SO4 goes to HSO4 Did it gain or lose a proton? Is it a Bronsted-Lowery acid or base?

Answers

H2SO4 is a chemical symbol for sulfuric acid. Converting this compound to HSO4 or the hydrogen sulfate ion means that it has lost one of its protons. With this we can conclude that H2SO4 is a Bronsted-Lowry acid.

Answer:

We conclude that it is a Bronsted-Lowry acid.

Explanation:

Hello! Let's solve this!

According to Bronsted-Lowry an acid is a chemical species that is capable of yielding protons and a Bronsted-Lowry base is a chemical species capable of accepting protons.

In this case we see that sulfuric acid (H2SO4) loses a proton to become HSO4.

We conclude that it is a Bronsted-Lowry acid.

Which statement is true about the energy of electromagnetic radiation? A.the frequency of the emmited radiation is inversely proportional to its energy. B.the frequency of the emitted radiation is directly proportional to its energy C.the wavelength of the emitted radiation is directly proportional to its energy. D.the amplitude of the emitted radiation is inversely proportional to its energy.

Answers

The frequency of the emitted radiation is directly proportional to its energy

Answer: Option (B) is the correct answer.

Explanation:

The radiation in which waves of electromagnetic field travel or propagate through the space and carries electromagnetic radient energy is known as electromagnetic radiation.

The relation between energy and frequency is as follows.

$E = h \nu$ ............ (1)

where, E = energy

h = plank's constant

$\nu$ = frequency

Therefore, the frequency of the emitted radiation is directly proportional to its energy.

Also, frequency is proportional to c over wavelength. The relation is as follows.

$\nu = (c)/(\lambda)$ ........ (2)

where, $\nu$ = frequency

c = speed of light

$\lambda$ = wavelength

Placing the value of frequency from equation (2) to equation (1) as follows.

$E = (hc)/(\lambda)$

Thus, the wavelength of the emitted radiation is inversely proportional to its energy.

How much heat energy must be added to 52kg Of water at 68°F to raise the temperature to 212°F? The specific heat capacity for water is 4.186×10 to the third power J/kg times degrees Celsius