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Tanzania [10]
3 years ago
13

Light refracts due to a change in ________

Physics
1 answer:
Nonamiya [84]3 years ago
7 0

The answer is b) Speed.

Light refracting is the just the change of direction of the light. And the change of direction in the light is caused by the change in speed.

An example of this would be when light travels into the water. When light hits the water it slows down, causing a change in speed and ultimately changing the direction, causing a light refraction to occur.

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When 1.14 g of octane (molar mass = 114 g/mol) reacts with excess oxygen in a constant volume calorimeter, the temperature of th
balandron [24]

Answer:

Q (reaction) = -69.7 kJ

Explanation:

Octane reacts with oxygen to give carbon dioxide and water.

C₈H₁₈ + 25 O₂ ---> 16 CO₂ +18 H₂O

This reaction is exothermic in nature. Therefore, the energy is released into the atmosphere. This reaction took place in a calorimeter, there the temperature (T) increases by 10 C. The heat capacity of the calorimeter is 6.97 kJ/C

The heat (q) of the reaction is calculated as follows:

Q= -cT, where c is the heat capacity of the calorimeter and T is the increase in temperature

q = -(6.97) x (10) = -69.7kJ

<em>Since the heat capacity is given in kilo -joule per degree Celsius, therefore, the mass of octane is not required </em>

7 0
3 years ago
which statement below is FALSE? A Gravity acts on any object with mass. B The closer objects are, the stronger the gravitational
GenaCL600 [577]

Answer:

Explanation:

5 0
3 years ago
Describe the energy of a playground swing at its highest point
Korvikt [17]
At the hightest point it would be potential energy, because the energy is stored and then when it is rocking back and forth it has kinetic energy
8 0
4 years ago
Which type of evidence was used to tie Ted Bundy to the murder of Lisa Levy?
Elodia [21]

Explanation:

identified by one of the Chi Omega survivors as the assailant, and hair and fiber evidence tied him to the Leach murder. His trial for the Florida attacks in June 1979 was the first-ever nationally televised trial in the United States.

6 0
2 years ago
Two girls,(masses m1 and m2) are on roller skates and stand at rest, close to each other and face-to-face. Girl 1 pushes squarel
Arturiano [62]

Answer:

\vec{v}_1 = -\frac{\vec{v}_2m_2}{m_1}

Explanation:

The center of mass of the system (two girls) is constant, as the velocity of the center of mass of the system is also constant.

\vec{v}_{cm} = \frac{m_1\vec{v}_1 + m_2\vec{v}_2}{m_1 + m_2}

<u>The initial velocity of the system is zero, since both girls are at rest.</u> So the velocity of the total system at any point should be zero as well.

0 = \frac{m_1\vec{v}_1 + m_2\vec{v}_2}{m_1 + m_2}\\\vec{v}_1 = -\frac{\vec{v}_2m_2}{m_1}

This is true, because there is no friction between the girls and the ground. Otherwise, the velocity of the center of mass wouldn't be constant.

5 0
3 years ago
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