Denise is riding her bike and falls to the ground. During the collision, she hits both grass and cement.Which best explains why Denise had fewer injuries to the area of her body that hit the grass? The grass did not exert a reaction force.
The grass did not exert an action force.
The grass shortens the time of the collision.
The grass extends the time of the collision.
Answers
Answer : Because the grass extends the time of the collision.
Explanation :
Denise is riding her bike and falls to the ground. During the collision, she hits both grass and cement.
He had fewer injuries to the area of her body that hit the grass because the grass extends the time of the collision and hence it imparts less impulse.
i.e.
Where
F is the force
t is the time of collision
Hence, the correct option is (d) " The grass extends the time of the collision ".
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Negative peer pressure
Positive peer influence
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negative peer influence
B) 1000 g of sodium chloride (NaCl)
C) 1000 g of calcium carbonate (CaCO3)
D) 1000 g of potassium sulfate (K2SO4)
Answers
Answer:
Option A
Explanation:
The number of particles a solute provides in a solution depends on its chemical formula and how it dissociates or ionizes in water.
A) 1000 g of glucose (C6H12O6) does not ionize or dissociate in water, so it remains as individual molecules. Therefore, it provides the fewest particles since it's composed of only C, H, and O atoms.
B) 1000 g of sodium chloride (NaCl) dissociates into two ions (Na⁺ and Cl⁻) in water, so it provides two particles per formula unit.
C) 1000 g of calcium carbonate (CaCO3) can dissociate into three ions (Ca²⁺, CO₃²⁻) in water, so it provides three particles per formula unit.
D) 1000 g of potassium sulfate (K2SO4) can dissociate into three ions (2K⁺ and SO₄²⁻) in water, so it also provides three particles per formula unit.
So, option A, 1000 g of glucose (C6H12O6), provides the fewest number of particles because it doesn't dissociate or ionize in water.
Answers
get a little more detail about the question.
Answer:
radio waves microwaves x-rays gamma rays
Explanation
Answers
1: Cation-positive charge2: Isotope-diff # of neutrons3: Element-it can be found on the periodic table(pure)4: Anion-negative charge5: Compound-even ration6: Ion-element with a charge(cations and anions are a more specific way of describing ions)Hope this helps!
Answers
Answer:1.37
Explanation:
Given
Length of Blade
Let blades be rotating at an angular velocity of
centripetal acceleration at any radial distance r is given by
at
at
thus
Final answer:
Centripetal acceleration depends inversely on the radius. The ratio of the centripetal accelerations at the end of the blade and at 4.78m from the center is approximately 0.73.
Explanation:
The centripetal acceleration of an object moving in a circle of radius r is given by the formula ac = v²/r, where v is the tangential velocity of the object. In this scenario, the velocity at both points on the blade is the same, as the blade is rotating as a whole.
Therefore, the centripetal acceleration on the blade at any point is inversely proportional to the radius from the center of the circle to that point.
So, the ratio of the centripetal acceleration at the end of the blade (6.58 m from the center) to the centripetal acceleration at a point located 4.78 m from the center, is the inverse ratio of their distances from the center. Therefore, the ratio is 4.78/6.58 which approximately equals 0.73.
Learn more about Centripetal Acceleration here:
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