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3 years ago

How does the chemical energy of C2H6 compare to the chemical energy of C2H4 and H2

Physics

1 answer:

Tems11 [23]3 years ago

6 0

The reactant is greater than the chemical energy of the products.

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14. A ball initially at rest rolls without slipping

elena-s [515]

Answer:

v = √(10gh/7)

Explanation:

Initial gravitational energy = final rotational energy + kinetic energy

PE = RE + KE

mgh = ½ Iω² + ½ mv²

For a solid sphere, I = ⅖ mr².

For rolling without slipping, ω = v/r.

mgh = ½ (⅖ mr²) (v/r)² + ½ mv²

mgh = ⅕ mv² + ½ mv²

mgh = 7/10 mv²

10/7 gh = v²

v = √(10gh/7)

7 0

3 years ago

a block is suspended 5 m above the ground if the block has a mass of 20 kg how much potential energy is stored in the block (g=

ozzi

Answer:

P.E = 980 Joules

Explanation:

Given the following data;

Mass = 20 kg

Height = 5m

Acceleration due to gravity = 9.8 m/s²

To find the potential energy stored in the block;

Mathematically, potential energy is given by the formula;

$P.E = mgh$

Where,

P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

Substituting into the equation, we have;

$P.E = 20 * 9.8 * 5$

P.E = 980 Joules

3 0

3 years ago

I just need an answer ASAP

nikdorinn [45]

Answer: c

Explanation: hope this helps :)

8 0

3 years ago

Read 2 more answers

A blue train of mass 50 kg moves at 4 m/s toward a green train of 30 kg initially at rest. What is the initial momentum of the b

emmainna [20.7K]

<em>The correct option is</em> D. The initial momentum of the blue and green train combined during the collision is 200 kgm/s.

<h3>Initial momentum of the blue and green train</h3>

Apply the principle of conservation of linear momentum as follows;

Pi = m1v1 + m2v2

where;

m1 is mass of blue train
m2 is mass of green train
v1 is velocity of blue train
v2 is velocity green train
Pi is the initial momentum of the two trains

Pi = (50 x 4) + 30(0)

Pi = 200 kgm/s

Thus, the initial momentum of the blue and green train combined is 200 kgm/s.

Learn more about momentum here: brainly.com/question/7538238

#SPJ1

4 0

2 years ago

determine the density in kg/m3 of a solid whose mass is 40 and whose dimension in centimetre are 30×4×3

Savatey [412]

Answer:

Density = 11.11 kg/m³

Explanation:

Given the following data;

Mass = 40 kg

Dimensions = 30×4×3 = 360 cm³ to m³ = 360/100 = 3.6 m³

Thus, volume = 3.6 m³

Now, we can find the density;

Density can be defined as mass all over the volume of an object.

Simply stated, density is mass per unit volume of an object.

Mathematically, density is given by the equation;

$Density = \frac{mass}{volume}$

Substituting into the equation, we have;

Density = 40/3.6

Density = 11.11 kg/m³

5 0

3 years ago