Answer:
element
Explanation:
elements consist of pure substances
(Assume the balloon stretched very easily and the temperature was constant.)
Answer:
P₂ = 0.8 atm
Explanation:
Given data:
Initial pressure = 1 atm
Initial volume = 7 L
Final volume = 9 L
Final pressure = ?
Solution:
P₁V₁ = P₂V₂
P₁ = Initial pressure
V₁ = Initial volume
P₂ = Final pressure
V₂ = Final volume
Now we will put the vales in formula.
P₁V₁ = P₂V₂
P₂ = P₁V₁ /V₂
P₂ = 1 atm × 7 L / 9 L
P₂ = 7 atm. L / 9 L
P₂ = 0.8 atm
Answer:
37.18°C.
Explanation:
where, Q is amount of heat absorbed by water (Q = 5.75 x 10⁵ J).
m is the mass of water (m = 2190 g).
c is the specific heat capacity of liquid water = 4.18 J/g°C.
ΔT is the temperature difference = (final T - initial T = 100.0°C - initial T).
∴ Q = m.c.ΔT = 5.75 x 10⁵ J.
5.75 x 10⁵ J = (2190 g)(4.18 J/g°C)(100.0°C - initial T)
∴ (100.0°C - initial T) = (5.75 x 10⁵ J)/(2190 g)(4.18 J/g°C) = 62.81°C.
∴ initial T = (100.0°C - 62.81°C) = 37.18°C.
it really easy its true
|
|
|
\/
True or False State the correct answer and provide your reasoning
6. Gravity is a force that can be changed. T/F
7. The bigger an object is, the smaller the force of gravity. T/F
8. As one object gets closer to another object, the force of gravity will increase. T/F
9. The Sun has a greater gravitational force than Jupiter. T/F
Wind is the horizontal movement of air from an area of high pressure to an area of low pressure.
Winds are caused by differences in air pressure.
These differences are caused by the uneven heating of the Earth’s surface.
Winds are named by their direction (where they originate from) and speed.
Wind speed is measured by an anemometer.
v Local Winds: winds that blow over short distances-caused by the uneven heating of Earth’s surface within a small area. They form only when large-scale winds are weak.
Ø Sea Breeze: a local wind that blows from an ocean or a lake.
§ Occurs because land heats up faster than water – The warm air expands creating an area of low pressure over the land, so the cooler more dense air moves toward the low-pressure land area.
Ø Land Breeze: a local wind that blows from the land toward water
§ Occurs because land cools faster than water – The low pressure (less dense) air is now over the water. The warm less dense air rises so the cooler air from the land moves toward that low pressure area by the water.