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Margarita [4]
3 years ago
13

How many chromosomes does a Human have? And how is a baby's gender determined? (Example: For the baby to be a boy, it would need

what kind of chromosome? For it to be a girl, what chromosome would be needed?)
Physics
2 answers:
Ad libitum [116K]3 years ago
4 0
A human has 46 chromosome pairs. For a baby to be a boy its needs to have a xy chromosome and for it to be a girl it has to be xx. 
viktelen [127]3 years ago
4 0
Humans have a total of 46 chromosomes or 23 pairs. A baby's gender is determined by its x and y chromosomes if its double x then it's a female if its an x and a y it's a male. The father determines all this since he's the one that holds the y.
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A model hydroelectric power station produces just enough electric power to light a 6.0 W lamp. The model is found to be 80% effi
Savatey [412]

You said that the useful output power from the model is 6 watts.  You also said that the model is 80% efficient.  We have no reason to doubt your word, so we know that

(useful output) / (input power) = 80% or 0.8

(6 watts) / (input power) = 0.8

Multiply each side by (input power): 6 watts = (0.8) (input power)

Divide each side by 0.8 :  Input power = (6 watts/ 0.8)

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4 0
3 years ago
A bullet is shot from a rifle with a velocity of 720.0 m/s what time is required for the bullet to strike a target 324.0m to the
Basile [38]

The bullet will strike the target placed in 324.0 m in the East in 0.45 seconds.

<u>Explanation:</u>

As we all know the epic relation between distance, speed and time; we cam easily estimate the time in which an object can reach to the destination or target.

As here in this case, we know the distance of the target and the velocity of a bullet exerted from a rifle given as follows,

Distance of the Target from the rifle edge = 324.0 m

Velocity of bullet exerted from the rifle = 720 m/s

Since we know that,

      \text {velocity}=\frac{\text {distance}}{\text {time}}

or

       \text {Time}=\frac{\text {distance}}{\text {velocity}}

We can simply implement all the values in the formula and get the results i.e the time required by the bullet to hit the target. Since both the values are in S.I units measures, we don't need to change or convert any of them. Hence,

       \text { Time }=\frac{324}{75}=0.45 \text { seconds }

Therefore, the bullet will hit the target in 0.45 seconds.

4 0
3 years ago
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