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4 years ago

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When does fertilization take place

1 answer:

lutik1710 [3]4 years ago

6 0

IN HUMANS -

Since ovulation usually occurs around 14 days after the first day of your period, fertilization usually takes place in “week 3” of pregnancy. So, for the first two weeks of the gestational period, you're not actually pregnant at all.

IN PLANTS -

Fertilization takes part in the ovary of a female flower. Wind or pollinators carry the pollen from the male anthers to the female flower parts. After the pollen lands on the stigma, a pollen tube forms, and male reproductive material travels down the style and into the ovary, where it fertilizes an ovule.

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Explain a situation in which you can accelerate even though your speed doesn't change

ANTONII [103]

You can accelerate by changing direction, even though you don't speed up/down. Remember that acceleration is a vector so, it has a direction and a magnitude. That's why this works! Hope it helps.

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4 years ago

Read 2 more answers

Two projectile launchers are beside one another on level ground. Both launchers are directed at the same angle with respect to g

kakasveta [241]

Answer:

(a) Projectile B will travel 4 times as far as projectile A prior to landing

Explanation:

Initial velocity = v

Angle at which the projectile is shot at = θ

g = Acceleration due to gravity

Range of a projectile is given by

$R=\frac {v^{2}\sin 2\theta}{g}$

When Initial velocity = v

$R_A=\frac{v^{2}\sin 2\theta}{g}$

When Initial velocity = 2v

$R_B=\frac{(2v)^{2}\sin 2\theta}{g}\\\Rightarrow R_B=\frac{4v^2\sin 2\theta}{g}$

Dividing the equtions, we get

$\frac{R_A}{R_B}=\frac{\frac{v^{2}\sin 2\theta}{g}}{\frac{4v^2\sin 2\theta}{g}}$

Here, the angle at which the projectiles are fired at are equal.

$\frac{R_A}{R_B}=\frac{1}{4}\\\Rightarrow R_B=4R_A$

Hence, projectile B will travel 4 times as far as projectile A prior to landing

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3 years ago

Can please anybody help me my H.W to fill in the blanks

kozerog [31]

<h3>Hi!</h3>

<h3>The correct answers would be:</h3>

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3 years ago

If the velocity of a car is 45 km/h west how far can it travel in 0.5 hours?

marissa [1.9K]

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Explanation: Solution:

v=d/t

Derive to find d

d= vt

= 45 km/h x 0.5 h

= 22.5 km

Cancel hours and the remaining unit is in km.

6 0

3 years ago

The velocity of a an object in linear motion changes from +25 meters per second to +15 meters per second in 2.0 seconds.

kodGreya [7K]

Answer:

$-5.0 m/s^2$

Explanation:

Missing question:

What is the object's acceleration?

Solution:

The acceleration of an object is given by

$a=\frac{v-u}{t}$

where

v is the final velocity

u is the initial velocity

t is the time taken for the change in velocity

For the object in this problem,

u = +25 m/s

v = +15 m/s

t = 2.0 s

Substituting,

$a=\frac{15-25}{2}=-5.0 m/s^2$

And the acceleration is negative because its direction is opposite to that of the velocity.

5 0

3 years ago