4 years ago

How many neutrons does element X have if its atomic number is 48 and its mass number is 167?

Physics

1 answer:

Black_prince [1.1K]4 years ago

7 0

You would have to subtract the mass number with atomic number which will give you 119 number of neutrons.

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What is the function of the organelle labeled E in the diagram?

nlexa [21]

Answer: D. Storage spaces in the cell.

Explanation: The organelle labeled E is called a vacuole and it’s used for storage in both plant and animal cells.

7 0

4 years ago

A hard drive disk rotates at 7200 rpm. The disk has a diameter of 5.1 in (13 cm). What is the speed of a point 6.0 cm from the c

ExtremeBDS [4]

Answer:

The speed will be "3.4×10⁴ m/s²".

Explanation:

The given values are:

Angular speed,

w = 7200 rpm

i.e.,

= $7200 \times \frac{2 \pi}{60}$

= $753.6 \ rad/s$

Speed from the center,

r = 6.0 cm

As we know,

⇒ Linear speed, $v=wr$

On putting the estimated values, we get

$=753.6\times 0.06$

$=45.216 \ m$

Now,

Acceleration on disk will be:

⇒ $a=\frac{v^2}{r}$

$=34074 \ m/s^2$

$=3.4\times 10^4 \ m/s^2$

3 0

3 years ago

A parallel plate capacitor is created by placing two large square conducting plates of length and width 0.1m facing each other,

borishaifa [10]

Answer:

8.854 pF

Explanation:

side of plate = 0.1 m ,

d = 1 cm = 0.01 m,

V = 5 kV = 5000 V

V' = 1 kV = 1000 V

Let K be the dielectric constant.

So, V' = V / K

K = V / V' = 5000 / 1000 = 5

C = ε0 A / d = 8.854 x 10^-12 x 0.1 x 0.1 / 0.01 = 8.854 x 10^-12 F

C = 8.854 pF

5 0

4 years ago

How much work is done when a 25-N horizontal force is applied to a 10-kg box, causing it to move 5 meters?

Katarina [22]

Answer:

W=50*sin(25)

Explanation:

W=F*D*sin(25)

W=10*5*sin(25)

W=50*sin(25)

8 0

3 years ago

Which of these objects has the least amount of inertia? A a cricket B a bicycle C a baseball

LenaWriter [7]

The least amount of inertia would be the one with least mass.

Of all the options, the smallest mass is likely the insect the cricket.

<span>A a cricket </span>

5 0

4 years ago