Answer: D
Explanation:
Forces can be divided into those that act by direct contact—such as when you push on a door to open it—and those that act at a distance, where there is no apparent physical contact between the objects. Magnetism, and electrical charge, and gravitation are examples of forces that act at a distance.
The mass of the blimp is 1.12 kg.
<em>Step 1</em>. Calculate the<em> volume of the blimp</em>.
<em>V</em> = 6.28 × 10⁹ mm³ × (1 m/1000 mm)³ = 6.28 m³
<em>Step 2</em>. Calculate the <em>mass of the helium</em>.
Mass = 6.28 m³ × (0.1786 kg/1 m³) = 1.12 kg
Chemical reaction: Pb(NO₃)₂(aq) + 2KI(aq) → PbI₂(s) + 2KNO₃(aq).
aq(<span>aqueous)
means dissolved in water.
s(solid) means that salt (in this reaction </span>PbI₂) not dissolved in water.
This chemical reaction is double displacement reaction - cations (Pb²⁺ and K⁺) and anions (NO₃⁻ and I⁻) <span>of the two reactants switch places and form two new compounds.</span>
A greenhouse gas is one that leads to global warming, by the absorption of infra-red radiation re-emitted by the ground. Common greenhouse gases include carbon dioxide and methane. Surprisingly, water vapour (which contains only oxygen and hydrogen) is also a greenhouse gas and can contribute to global warming.
Answer:
New temp = 135°C
Explanation:
From ideal gas equation
But; P1 = 10000Pa. P2 = 45000
V1 = 200 cc. V2 = 100 cc
T1 = 60°C. T2 = ??
From our formulae above
then T2= 45000×100×60÷ (10000×200)
T2= 135°C