Question

In: Physics

Indicate whether the following statements are true or false. (Select T-True, F-False. If the first is...

Indicate whether the following statements are true or false. (Select T-True, F-False. If the first is T and the rest F, enter TFFFFF).

A) A white dwarf is the remnant of the star's core visible after the outer layers have been ejected.

B) A planetary nebula is made of hot gas that shows emission line spectra.

C) A planetary nebula forms when a star violently explodes.

D) White dwarfs are small dense objects about the size of the Earth.

E) White dwarfs are composed mostly of hydrogen.

F) A planetary nebula is the remnant of the outer envelope of a star

Solutions

Expert Solution

A) True

White swarf is the remanant of the core of the star after it stops supporting gravitational force with the radiation pressure due to the burning matter present in the star.Thus outer layers being ejected.

B) True

Planetary Nebula is an expanding, glowing shell of ionized gas ejected from red giant stars late in their lives and therefore shows emission lines.

C) False

When a star violently explodes it forms a compact object but planetary nebula is formed at later stages of red giant stars.

D) True

White dwarfs are around the size of 10000 kilometers which is compared to that of earth's. Also these are dense objects having mass of sun like stars.

E) False

No white dwarfs consists of Carbon and oxygen in the core which is mostly contributing to the mass of white dwarfs. However Helium and Hydrogen is also present but only near the surface of it.Hydrogen content is much lesser than carbon and oxygen content content.

F) True

Answer: TTFTFT

genius_generous answered 1 year ago
Next > < Previous

Related Solutions

Indicate whether the following statements are always true or can be false. (Select T-True, F-False. If...
Indicate whether the following statements are always true or can be false. (Select T-True, F-False. If the first is F and the rest T, enter FTTTTT). A) In order not to slow down, a bicycle moving at a constant velocity needs a small net force applied. B) If two objects have the same acceleration, they are under the influence of equal forces. C) If a net force acts on an object, the object's velocity will change. D) During the collision...
Indicate whether each of the following statements is true or false. 1. T F Suppose a...
Indicate whether each of the following statements is true or false. 1. T F Suppose a firm’s cost function is given by c(q) = 1/4 q2 + 5q + 25. This firm’s average total cost is lowest at q = 10. 2. T F In the short run, fixed costs need to be paid even if the firm produces nothing and increase as the firm decides to produce more. 3. T F Supposing that a firm has increasing marginal costs,...
Indicate whether each of the following statements is true (T) or false (F) and explain your...
Indicate whether each of the following statements is true (T) or false (F) and explain your answer: (a) The covariance between two variables is the same irrespective of the unit of measurements. (b) The expressions “rule of thumb” and “conventionally” are synonyms. (c) If the covariance between Y and itself is 16, then the standard deviation of Y is 16. 2 (d) If there is no relationship between two variables Y and X, then their correlation coefficient is zero. (e)...
True or False Enter a T or an F in the blank to indicate whether the...
True or False Enter a T or an F in the blank to indicate whether the statement is true or false. ___ 1. Practical standards are generally viewed as better than ideal standards for motivating employees. ___ 2. Ideal standards allow for machine break- down time and other normal inefficiencies. ___ 3. In determining a material price standard, any freight or handling costs should be excluded. ___ 4. The standard rate for variable overhead consists of the variable portion of...
True or False Enter a T or an F in the blank to indicate whether the...
True or False Enter a T or an F in the blank to indicate whether the statement is true or false. ___ 1. If product A has a higher unit contribution margin than product B, then product A will also have a higher CM ratio than product B. ___ 2. The break-even point occurs where the contribution margin is equal to total variable expenses. ___ 3. The break-even point can be expressed ei- ther in terms of units sold or...
True or False Enter a T or an F in the blank to indicate whether the...
True or False Enter a T or an F in the blank to indicate whether the statement is true or false. ___ 1. A utility such as a water company would typically use a process costing system. ___ 2. Under process costing it is important to identify the materials, labor, and overhead costs asso- ciated with a particular customer’s order just as under job-order costing. ___ 3. In a process costing system, the production report replaces the job cost sheet....
Theory of enzymes. [Indicate whether the following statements are true or false by writing T or...
Theory of enzymes. [Indicate whether the following statements are true or false by writing T or F in the spaces provided.] _____ Enzymes catalyze reactions by increasing the reaction free energy (ΔG). _____ Enzyme are remarkable for their substrate specificity. _____ Enzyme can convert light energy into chemical or mechanical energy. _____ Catalytic residues in enzymes can include amino acid side chains, RNA bases, and other organic cofactors. _____ Michaelis-Menten kinetic theory only applies to enzymes with single substrates. _____...
Indicate whether the following statements are (True) or (False) and correct the False statements:
 Indicate whether the following statements are (True) or (False) and correct the False statements: 1. The corporate treasurer typically handles both cost accounting and financial accounting. 2. Marginal analysis states that financial decisions should be made and actions taken only when added benefits are greater than zero. ( 3. The conflict between the goal of a firm's owners and the goal of its non-owner managers is incompatibility. () 4. The sale of either bonds or stocks to the general public is called private placement....
Indicate whether each of the following statements is true or false. If false, indicate how to...
Indicate whether each of the following statements is true or false. If false, indicate how to correct the statement. a. The amount reported for accumulated other comprehensive income (AOCI) on the balance sheet must be a positive amount consistent with all other stockholders’ equity accounts. b. Changes in AOCI are reflected in other comprehensive income, which is different from net income. c. Other comprehensive income does not imply a change in cash.
True or False—Indicate if the statement is True (T) or False (F) for each of the...
True or False—Indicate if the statement is True (T) or False (F) for each of the following 10 statements: __________ 1. While variable costs are always relevant to a business decision, fixed costs are not, and need to be analyzed closely to determine if they will be different amongst the alternatives being considered. __________ 2. Facility level costs often include costs such as rent, property taxes, building maintenance, and utilities; facility level costs benefit the production process as a whole...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT