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monitta
3 years ago
13

If you add two velocity vectors going in opposite directions, will the resultant vector be smaller or larger than the vectors yo

u are adding?
Choose the correct answer with the correct reasoning.

Question 11 options:

smaller, because the vectors are added to each other and increase the velocity


larger, because the vectors are added to each other and increase the velocity


smaller, because part of the velocities cancel each other out


larger, because the part of the velocities cancel each other out
Physics
2 answers:
11111nata11111 [884]3 years ago
7 0

smaller, because the part of the velocities cancel each other out

Lemur [1.5K]3 years ago
4 0

Explanation:

If two vectors going in opposite directions and we add them, the resultant is given by the sum of vectors as :

R=\sqrt{A^2+B^2+2AB\ cos(180)}, cos (180) = -1

R=A+(-B)

If the vectors are in same directions, the resultant is equal to the sum of vectors. Here, the resultant of two vectors is smaller because the part of the velocities cancel out each other. Hence, the correct option is (c).

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Liquid water has surface tension, has a high specific heat, and functions effectively as a solvent for polar covalent and ionica
MrRissso [65]

Answer:

The property to form polar covalent bond and hydrogen bonds

Explanation:

Liquid water exhibits the property of surface tension, functions as solvent for ionic and polar covalent bonded molecules and have high specific heat.

All these properties can be credited to the property of water to form hydrogen bonds with liquid water molecules where the hydrogen bonding results when hydrogen atom of a water molecule is attracted to a more electro negative oxygen atom of other water molecule in the neighborhood while polar covalent bond formation results in the the water molecule as it is a polar covalent molecule as it contains hydrogen atom and an electronegative oxygen atom which results in the charge distribution in the molecule.

3 0
3 years ago
How long does it take a car travelling at 80 m/s to decelerate to 18 m/s with an acceleration rate of -16m/s?
sertanlavr [38]
  • initial velocity=u=80m/s
  • Final velocity=v=18m/s
  • Acceleration=a=-16m/s^2
  • Time=t

We know

\boxed{\sf a=\dfrac{v-u}{t}}

\\ \sf\longmapsto t=\dfrac{v-u}{a}

\\ \sf\longmapsto t=\dfrac{18-80}{-16}

\\ \sf\longmapsto t=\dfrac{-62}{16}

\\ \sf\longmapsto t=3.8s

4 0
3 years ago
Given that the concentration of bovine carbonic anhydrase is 3.3 pmol ⋅ L − 1 and R max ( V max ) = 222 μmol ⋅ L − 1 ⋅ s − 1 , d
LuckyWell [14K]

Answer:

The turnover number of the enzyme molecule bovine carbonic anhydrase = 67,272,727.27 s^–1.

Explanation:

Given:

The concentration of bovine carbonic anhydrase = total enzyme concentration = Et = 3.3 pmol⋅L^–1 = 3.3 × 10^–12 mol.L^–1

The maximum rate of reaction = Rmax (Vmax) = 222 μmol⋅L^–1⋅s^–1 = 222 × 10^–6 mol.L^–1⋅s^–1

The formula for the turnover number of an enzyme (kcat, or catalytic rate constant) = Rmax ÷ Et = 222 × 10^–6 mol.L^–1⋅s^–1 ÷ 3.3 × 10^–12 mol.L^–1 = 67,272,727.27 s^–1

Therefore, the turnover number of the enzyme molecule bovine carbonic anhydrase = 67,272,727.27 s^–1

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4 years ago
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irga5000 [103]
They need resources such as food and sometimes water
6 0
4 years ago
A rifle fires a 2.10 x 10^-2 kg pellet straight upward, because the pellet rests on a compressed spring when the trigger is is p
yKpoI14uk [10]

m = mass of pellet = 2.10 x 10⁻² kg

x = compression of spring at the time launch = 9.10 x 10⁻² m

h = height gained by the pellet above the initial position = 6.10 m

k = spring constant

using conservation of energy

spring potential energy = gravitational potential energy of pellet

(0.5) k x² = m g h

inserting the values

(0.5) k (9.10 x 10⁻²)² = (2.10 x 10⁻²) (9.8) (6.10)

k = 303.2 N/m

4 0
3 years ago
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