Answer:
Both may result in eclipses of the sun or moon
Explanation:
Got it right on the test
Answer:
When we throw a projectile up, the negative gravity acceleration acts on it. Thus, when the ball reaches the highest point, the speed of the ball becomes zero.
Explanation:
Acceleration is a vector magnitude that indicates the variation of speed per unit of time.
As displacement, velocity and acceleration are vectors we will analyze this vectorly.
We consider positive acceleration when the acceleration vector is directed in the same direction as the movement. (Acceleration)
On the other hand, we consider negative acceleration when the acceleration vector is directed in the opposite direction to the movement. (de-acceleration)
c. a flask of pond water.
d. a jar of soil.
The sample that is a pure substance is:A. a test tube of zinc oxide.
A pure substance consists of only one type of substance with uniform properties throughout. In this case, a test tube of zinc oxide would be a pure substance. Zinc oxide (ZnO) is a chemical compound made up of zinc (Zn) and oxygen (O) atoms in a fixed ratio. It has a specific chemical formula and a consistent composition, making it a pure substance.
On the other hand:
B. A container of zinc and oxygen would be a mixture since it contains two different substances, zinc and oxygen, in their elemental forms.
C. A flask of pond water is a mixture because it contains a combination of different substances, such as water, dissolved minerals, microorganisms, and organic matter.
D. A jar of soil is also a mixture since it consists of a combination of various components, including minerals, organic matter, water, air, and possibly microorganisms.
Therefore, the correct answer is A. a test tube of zinc oxide, which represents a pure substance.
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A Heat transferred from the chocolate bar to his pocket.
B. Heat evaporated from his pocket to his chocolate bar.
c. Heat condensed from his leg to his chocolate bar in his pocket.
D. Heat transferred from the environment to the chocolate bar in his pocket.
Answer:
d
Explanation:
because it was in a hot environment your pocket
Answer:
$ 62.578
Explanation:
Conversion factors:
1 gal = 3.785 L
1.609km = 1 mi
$1.26 = 1 euro
1 week = 7 days
Converting the car’s mileage from mi/gal to km/L
39 mi/gal x 1 gal/3.785L x 1.609km/1 mi = 16.578 km/L
Finding the L required in a day
107 km x 1L/16.578 km = 6.45 L
Finding the euro spent in day
1.10 euro/L x 6.45 L = 7.095 euro/ day
Finding the euro spent in a week and converting it to dollars
7.095 euro/ day x 7 days x $1.26/ 1 euro = $ 62.578