PHYSICS HIGH SCHOOL

The spectrum produced by a prism or a raindrop is evidence that the average speed of light in the material depends on the light'sA. transmission qualities.
B. color.
C. wave nature.
D. particle nature.

Answers

Answer 1
Answer: The correct answer for the question that is being presented above is this one: "B. color." The spectrum produced by a prism or a raindrop is evidence that the average speed of light in the material depends on the light's color. White light is being refracted into different colors.

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If a 78.2 kg kangaroo weighs 6742 N on the planet katar, calculate katar's radius

Answers

Answer:

  about 7500 km

Explanation:

The mass of planet Katar is 7.27×10^25 kg. The force on the kangaroo is given by ...

  F = GmM/r^2

Solving for r, we have ...

  r = √(GmM/F) = √(6.67×10^-11 × 78.2 × 7.27×10^25 / 6742) ≈ √(5.62×10^13)

This is in meters, so the radius in km is about ...

  r ≈ 7500 km

Determine the volume at the equivalence point if a 0.100 M NaOH(aq) solution is used to titrate the following acidic solutions: (a) 50.0 mL of 0.200 M HBr(aq) (b) 30.0 mL of 0.150 M HNO3(aq)

Answers

Answer:

a) NaOH volume at the equivalence point is 100 ml.

b) NaOH volume at the equivalence point is 45 ml.

Explanation:

To calculate the concentration of acid, we use the equation given y neutralization reaction:

n_1M_1V_1=n_2M_2V_2

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of acid.

n_2,M_2\text{ and }V_2 are the n-factor, molarity and volume of base

a) If a 0.100 M NaOH (aq) solution is used to titrated with 50.0 mL of 0.200 M HBr(aq).

We are given:

n_1=1\nM_1=0.200M\nV_1=50.0mL\nn_2=1\nM_2=0.100M\nV_2=?mL

Putting values in above equation, we get:

1* 0.200M* 50.0 mL=1* 0.100 M* V_2\n\nV_2=100 mL

b) If a 0.100 M NaOH (aq) solution is used to titrated with 30.0 mL of 0.150 M HNO_3(aq).

We are given:

n_1=1\nM_1=0.150M\nV_1=30.0mL\nn_2=1\nM_2=0.100M\nV_2=?mL

Putting values in above equation, we get:

1* 0.150M* 30.0 mL=1* 0.100 M* V_2\n\nV_2=45 mL

You dip your finger into a pan of water twice each second, producing waves with crests that are separated by 0.15 m. Determine the frequency, period, and speed of these water waves.

Answers


Frequency = rate of sploosh = 2 per second  =  2 Hz.

Period = ( 1/frequency ) =  1/2  second

Speed = (wavelength) x (frequency) = (0.15m) x ( 2/sec) = 0.075 m/s .

Frost wedging happens when _____.water ions dissolve rock minerals
water freezes inside a rock, causing it to break
oxygen reacts with the chemicals in rock
rocks break from repeated exposure to the Sun's heat

Answers

Answer: water freezes inside a rock, causing it to break

Weathering is a natural process in which the rocks break into pieces or sediments by the action of wind, water and chemical agents. Frost wedging is a physical weathering process. It occurs in an area where temperature fluctuations occurs due to change in the climatic conditions. This occurs due to rapid heating and cooling. The rocks lying in a cold environment, the water residing in the rocks gets freezed. The water in ice form that is solid form acquire more space than in liquid form, therefore, the developed ice will affect the physical structure of the rock. The formation of ice results in the development of break or crack in the rock typically in the shape of a wedge and thus the phenomena is called as frost wedging.

Hence, frost wedging happens when water freezes inside a rock, causing it to break.

Answer:

Frost wedging happens when water freezes inside of a rock, causing it to break

Which has more heat, a home oven at 500 degrees Celsius, or a one ton commercial oven at 500 degrees celsius?

Answers

A commercial oven because it is more durable plus it’s more professional so they use more heat then we do at home

Which of the following rules should be used to keep the appropriate distance between your vehicle and the vehicle in front of you?

Answers

The correct answer is C) Two-second rule.

This means that a driver must maintain a distance that would take at least 2 seconds to cover, at the current speed of the car. This means that in case the car in front suddenly comes to a full stop, the driver of the car behind has 2 seconds react and hit his own brakes. A two-car length rule might be alright when driving at low speeds, but when going at high speeds (on a highway, for example), a two-car length can be covered in a fraction of a second, which means a sudden braking by the car in front would almost guarantee an accident.

Answer:

4-second following distance
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