Answer:
Friction acts in the opposite direction to the motion of the truck and box.
Explanation:
Let's first review the problem.
A moving truck applies the brakes, and a box on it does not slip.
Now when the truck is applying brakes, only it itself is being slowed down. Since the box is slowing down with the truck, we can conclude that it is friction that slows it down.
The box in the question tries to maintains its velocity forward when the brakes are applied. We can think of this as the box exerting a positive force relative to the truck when the brakes are applied. When we imagine this, we can also figure out where the static friction will act to stop this positive force. Friction will act in the negative direction. Or in other words, friction will act in the opposite direction to the motion of the truck and box. This explains why the box slows down with the truck, as friction acts to stop its motion.
I am pretty sure the answer would be too stretch
Answer:
The time rate of change in air density during expiration is 0.01003kg/m³-s
Explanation:
Given that,
Lung total capacity V = 6000mL = 6 × 10⁻³m³
Air density p = 1.225kg/m³
diameter of the trachea is 18mm = 0.018m
Velocity v = 20cm/s = 0.20m/s
dv /dt = -100mL/s (volume rate decrease)
= 10⁻⁴m³/s
Area for trachea =
0 - p × Area for trachea =
⇒
ds/dt = 0.01003kg/m³-s
Thus, the time rate of change in air density during expiration is 0.01003kg/m³-s
The products should she record in the last row of the table : <u>2LiCl + 3O₂</u>
<h3>Further explanation</h3>
There are several chemical reactions, namely:
-
Formation reaction
-
Decomposition reaction.
- Replacement reaction.
-
Multiple replacement reactions
-
Neutralization reaction.
-
Combustion reaction.
-
Polymerization
The decomposition reaction in a chemical reaction shows the decomposition reaction of a compound into its constituent elements or compounds
Rosa recorded three similar decomposition reactions
Reactions that occur :
1. 2 NaClO₃ ⇒ 2NaCl + 3O₂
2. 2KClO₃ ⇒ 2KCl + 3O₂
3. 2LiClO₃ ⇒ 2LiCl + 3O₂
There are similarities in the decomposition that forms oxygen and chloride compounds
Learn more
homogenous mixture of two or more pure substances
brainly.com/question/1832352
Keywords : products, patterns, chemical reaction, table, decomposition reactions
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Answer:
Mass of the climber = 69.38 kg
Explanation:
Change in length
Load, P = m x 9.81 = 9.81m
Young's modulus, Y = 0.37 x 10¹⁰ N/m²
Area
Length, L = 15 m
ΔL = 5.1 cm = 0.051 m
Substituting
Mass of the climber = 69.38 kg
