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3 years ago

Which or the following is a science ? A. Physics B.astrology C. Football statics D. Language studies

Physics

2 answers:

d1i1m1o1n [39]3 years ago

8 0

A. Physics

The study of how objects interact with each other

V125BC [204]3 years ago

5 0

Definetly Physics...........

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The barrier to C-C bond rotation in iodoethane is 13 kJ/mol. What energy can you assign to an H-I eclipsing interaction?

n200080 [17]

Answer:

5J/mol

Explanation:

H-H eclipsed = Torsional strain = 4.0 kJ/mol

H-CH3 eclipsed = Mostly torsional strain = 6.0 kJ/mol

CH3-CH3 eclipsed =Torsional and steric strain = 11.0 kJ/mol

CH3-CH3 gauche = Steric strain = 3.8 kJ/mol

You know each H-H eclipsed is 4 kJ/mol (8 kJ/mol total) and the reported barrier is 13 kJ/mol. Therefore the H-I eclipsed interaction must be 5 kJ/mol, (13-8 = 5).

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3 years ago

A boat is cruising in a straight line at a constant speed of 2.6 m/s when it is shifted into neutral. after coasting 11.0 m the

yawa3891 [41]

We know that rate of acceleration is constant, which means change of velocity is constant (velocity changes in a linear way). The boat coasted for 11 meters and its speed decreased by 1 m/s. Since deceleration is constant, we can find out how much time the boat spent coasting by dividing 11 meters (distance traveled) by average speed ((2.6+1.6)/2), which gives us 11 /2.1 = 5.238 seconds. The rate of deceleration is change in velocity divided by time. -1 m/s divided by 5.238 seconds = -.19m/s/s.

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4 years ago

A boy takes hold of a rope to pull a wagon (m = 50 kg) on a surface with a static coefficient of friction μS = 0.25. Calculate t

vivado [14]

Answer:

<em>The force that would be applied on the rope just to start moving the wagon is 122 N</em>

Explanation:

Frictional force opposes motion between two surfaces in contact. It is the force that must be applied before a body starts to move. Static friction opposes the motion of two bodies that are in contact but are not moving. The magnitude of static friction to overcome for the body to move can be calculated using equation 1.

F = μ x mg .............................. 1

where F is the frictional force;

μ is the coefficient of friction ( μs, in this case, static friction);

m is mass of the object and;

g is the acceleration due to gravity( a constant equal to 9.81 m/ $s^{2}$ )

from the equation we are provide with;

μs = 0.25

m = 50 kg

g = 9.81 m/ $s^{2}$

F =?

Using equation 1

F = 0.25 x 50 kg x 9.81 m/ $s^{2}$

F = 122.63 N

<em>Therefore a force of 122 N must be applied to the rope just to start the wagon.</em>

6 0

3 years ago

Read 2 more answers

The highest barrier that a projectile can clear is 19.7 m, when the projectile is launched at an angle of 15.0o above the horizo

svlad2 [7]

Answer:

76 m /s

Explanation:

maximum height, H = 19.7 m

Angle of projection, θ = 15 degree

Let u be the projectile launch speed

Use the formula of maximum height

$H = u^{2}Sin\theta ^{2}/2g$

$19.7 = u^{2}Sin^{2}15/19.6$

u = 75.9199 = 76 m /s

6 0

3 years ago

What tissue composes the basement membrane surrounds cushions blood vessels and nerves

xxTIMURxx [149]

Answer:

Explanation:

Fascia is loose connective tissue that surrounds and interpenetrates all components of the human body including muscles, nerves, blood vessels, and organs. It provides structural integrity, serves as a matrix for intercellular communication, and is involved in biochemical and bioelectric signaling.

5 0

3 years ago