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3 years ago

Examine the diagram of a cell.

Physics

2 answers:

AURORKA [14]3 years ago

8 0

Answer:

It is the Nucleus

Rina8888 [55]3 years ago

4 0

Answer:

Nuclease

Explanation:

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Alkali Metals- 1 valence electron __________________&__________________.

Paraphin [41]

Hi , I think that the elements that have one valence electron and that are in the alkali metals are the answers .
1.lithium
2.sodium
3.potassium
4.rubidium
5.cesium
6.francium

8 0

4 years ago

A hungry 11.5 kg predator fish is coasting from west to east at 75.0 cm/s when it suddenly swallows a 1.25 kg fish swimming from

Oksi-84 [34.3K]

Answer with Explanation:

We are given that

Mass,m=11.5 kg

$v_x=75 cm/s=0.75 m/s,v_y=0$

1 m=100 cm

$m'=1.25 kg$

$v'_x=0,v'_y=3.6 m/s$

According to law of conservation momentum along east west direction

$11.5\times 0.75+1.25(0)=(11.5+1.25)V_x$

$8.625=12.75V_x$

$V_x=\frac{8.625}{12.75}$

$V_x=0.68 m/s$

According to law of conservation of momentum along north south direction

$11.5(0)+1.25(3.6)=(11.5+1.25)V_y$

$4.5=12.75V_y$

$V_y=\frac{4.5}{12.75}=0.35 m/s$

$V=\sqrt{V^2_x+V^2_y}$

$V=\sqrt{(0.68)^2+(0.35)^2}$

$V=0.76 m/s$

Direction, $\theta=tan^{-1}(\frac{V_y}{V_x})$

$\theta=tan^{-1}(\frac{0.35}{0.68})$

$\theta=27.23^{\circ}$

5 0

4 years ago

Why are SI units helpful for describing objects? A. They are the standard used by scientists worldwide. B. They are more accurat

Ganezh [65]

They are the standard system used by scientists worldwide, and
officially by almost all nations of the world. So if you describe a
measurement in terms of SI units, there's less chance that you'll
need to explain the measurement to anyone who reads it ...
most scientists and common people worldwide will understand
what your number means.

7 0

3 years ago

A constant net force of 345 N is applied to slide a heavy stationary

liubo4ka [24]

Answer:

P = 517.5 [kg*m/s]

Explanation:

We must remember that momentum is defined as the product of force by the time of force duration.

$P=F*t$

where:

P = momentum [kg*m/s]

F = force [N]

t = time [s]

$P=345*1.5\\P=517.5[kg*m/s]$

4 0

3 years ago

Consider two slides, both of the same height. One is long and the other is short. From which slide will the children have a grea

bixtya [17]

Answer:

Explanation:

Sine the plane is horizontal , effect of gravity on horizontal motion will be nil.

Since no friction is acting on it , no horizontal force is acting on it. Since no vertical ,no horizontal force is acting on it , it will have uniform motion ,ie its velocity will remain unchanged during its motion , no matter how long the path is.

So , velocity along the path will remain unchanged.

4 0

3 years ago