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ExtremeBDS [4]
3 years ago
13

How much time will it take light moving at 300,000 km/s to reach us from the sun? The sun is 15,000,000 km from earth.

Biology
2 answers:
Brut [27]3 years ago
7 0
50s because 15,000,000/300,000 is 50
KATRIN_1 [288]3 years ago
6 0

Answer:

50 sec

Explanation:

Well we have the speed given as 300,000 km/s and distance given as 15,000,000 km. The time can be calculated by dividing the distance with the speed since

s = d/t

⇒t = d/s = 15,000,000 km/ 300,000 km/s

=50 sec

∴ t = 50 sec

Hope it answers your question!

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1. do you think erythropoietin levels in athletes at low altitude are lower, higher, or the same after training at a high altitu
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1. Erythropoietin will be higher at low   altitude. Erythropoietin or EPO level will be higher because of the raised blood oxygen training but its lasting period will depend on the training content as here it is only 2 months.

About high erythropoietin:

Among the objectives of altitude training is to improve athletes' sea-level endurance performance by raising blood oxygen carrying capacity. The attainment of improved haematological variables is mostly due to the augmented erythropoietin (EPO) production in hypoxia. The duration of exposure and degree of hypoxia affect the level of the erythropoietin EPO rise and the rate of erythropoiesis acceleration. The haematological response to altitude training may also be influenced by a wide range of additional factors.

2. 100 ml of blood contain 27.8 mL of oxygen. This can be said as it has been shown that a healthy person typically possesses 20 grammes of haemoglobin in every 100 millilitres of blood.

Procedure:

=20∗1.39

=27.8mL

Amount of oxygen found in 11 grams of hemoglobin is equal to 1.39 milliliters of oxygen.

Thus, the total amount of oxygen in milliliters would be equal to product of total weight of hemoglobin and the total amount of oxygen in ml in one gram of hemoglobin.

3. Athletes training at high altitude have more oxygen molecules. They have an advantage as a result of having more red blood

Why so:

Higher elevations have thinner air, which has less oxygen molecules per volume of air. The body therefore makes more red blood cells when athletes workout at these high elevations. For up to 20 days, these additional blood cells remain in the body. Also as a result of having more red blood cells, their blood can carry more oxygen. When they compete at lower elevations, their muscles naturally get a boost from more oxygen.

Know more about erythropoietin here:

brainly.com/question/11995962

#SPJ4

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