How to figure out the question?

The Celsius temperature scale is based on which of the following

saw5 [17]

The boiling and freezing point of water. You know this because at 0degrees water freezes and at 100 degrees water boils

6 0

3 years ago

Read 2 more answers

Sirius A is 8.6 light-years from Earth. What is this distance in kilometers? What is this distance in feet?

Jlenok [28]

Answer:

a. 8.136 × 10¹³ km b. 2.669 × 10¹⁹ feet

Explanation:

a. What is this distance in kilometers?

Since Sirius A is 8.6 light years away from Earth and one light year = distance travelled by light in a year = 3 × 10⁸ m/ s × 365 days/year × 24 hr/day × 3600 s/hr = 9.4608 × 10¹⁵ m = 9.4608 × 10¹² km.

Then 8.6 light years = 8.6 × 1 light year

= 8.6 × 9.4608 × 10¹² km

= 81.363 × 10¹² km

= 8.1363 × 10¹³ km

≅ 8.136 × 10¹³ km

b. What is this distance in feet?

Since 1 meter = 3.28 feet,

8.6 light years = 8.1363 × 10¹² km

= 8136.3 × 10¹⁵ m

= 8136.3 × 10¹⁵ × 1 m

= 8136.3 × 10¹⁵ × 3.28 feet

= 26687.1 × 10¹⁵ feet

= 2.66871 × 10¹⁹ feet

≅ 2.669 × 10¹⁹ feet

3 0

3 years ago

Brandon buys a new Seadoo He goes 12 km north from the beach . He jumps wakes for 6 km to the east . What distance cover ? What

zmey [24]

Answer:

distance- I think it is 6 then the displacement is 13.41

Explanation:

4 0

3 years ago

Helium gas contained in a piston cylinder assembly undergoes an isentropic polytropic process from the given initial state with

jeyben [28]

Answer:

Heat transfer during the process = 0

Work done during the process = - 371.87 KJ

Explanation:

Initial pressure $P_{1}$ = 0.02 bar

Initial temperature $T_{1}$ = 200 K

Final pressure $P_{2}$ = 0.14 bar

Gas constant for helium R = 2.077 $\frac{KJ}{kg k}$

This is an isentropic polytropic process so temperature - pressure relationship is given by the following formula,

$\frac{T_{2} }{T_{1} }$ = $[\frac{P_{2} }{P_{1} } ]^{\frac{\gamma - 1}{\gamma} }$

Put all the values in above formula we get,

⇒ $\frac{T_{2} }{200}$ = $[\frac{0.14 }{0.02 } ]^{\frac{1.4 - 1}{1.4} }$

⇒ $\frac{T_{2} }{200}$ = 1.74

⇒ $T_{2}$ = 348.72 K

This is the final temperature of helium.

For isentropic polytropic process heat transfer to the system is zero.

⇒ ΔQ = 0

Work done W = m × ( $T_{1}$ - $T_{2}$ ) × $\frac{R}{\gamma - 1}$

⇒ W = 1 × ( 200 - 348.72 ) × $\frac{2.077}{1.4 - 1}$

⇒ W = 371.87 KJ

This is the work done in this process. here negative sign shows that work is done on the gas in the compression of gas.

3 0

3 years ago

"Energy is never created of destroyed, it only transforms from one form to another" is the definition of… A. The Law of Diminish

Serga [27]

Answer:

B. The Law of Conservation of Energy

Explanation:

In Science, energy can be defined as the ability of an object or body to do work. There are two (2) main types of energy and these are;

I. Kinetic energy: it can be defined as an energy possessed by an object or body due to its motion.

Mathematically, kinetic energy is given by the formula;

Where, K.E represents kinetic energy measured in Joules.

M represents mass measured in kilograms.

V represents velocity measured in metres per seconds square.

II. Potential energy: it can be defined as an energy possessed by an object or body due to its position.

Mathematically, potential energy is given by the formula;

Where, P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

Additionally, the various forms of energy are solar energy, electrical energy, chemical energy, thermal energy, wind energy, nuclear energy etc.

Hence, energy is never created of destroyed, it only transforms from one form to another" is the definition of The Law of Conservation of Energy.

8 0

3 years ago