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3 years ago

Which of these properties change if the size of an object changes?

1 answer:

german3 years ago

7 0

The correct answer is
Density

In fact, the density of an object is the ratio between its mass m and its volume V:
 $d= \frac{m}{V}$
if the size of the object changes, its volume V changes as well, therefore the density d must change.

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An object moves with constant acceleration 3.45 m/s2 and over a time interval reaches a final velocity of 14.0 m/s.

Sav [38]

Assuming the object was originally at rest, it must have been traveling for
14.0/3.45 = 4.06 seconds

4 0

3 years ago

An electron initially has a speed 16 km/s along the x-direction and enters an electric field of strength 27 mV/m that points in

weqwewe [10]

Answer:

a) $t=1.4\times 10^{-5}\ s$

b)S= 46.4 cm

Explanation:

Given that

Velocity = 16 Km/s

V= 16,000 m/s

E= 27 mV/m

E=0.027 V/m

d= 22.5 cm

d= 0.225 m

lets time taken by electron is t

d = V x t

0.225 = 16,000 t

$t=1.4\times 10^{-5}\ s$

We know that

F = m a = E q ------------1

Mass of electron ,m

$m=9.1\times 10^{-31}\ kg$

Charge on electron

$q=1.6\times 10^{-19}\ C$

So now by putting the values in equation 1

$a=\dfrac{E q}{m}$

$a=\dfrac{1.6\times 10^{-19}\times 0.027}{9.1\times 10^{-31}}\ m/s^2$

$a=4.74\times 10^{9}\ m/s^2$

$S= ut+\dfrac{1}{2}at^2$

Here initial velocity u= 0 m/s

$S= \dfrac{1}{2}\times 4.74\times 10^{9}\times (1.4\times 10^{-5})^2\ m$

S=0.464 m

S= 46.4 cm

S is the deflection of electron.

4 0

4 years ago

Read 2 more answers

A box is against a wall. A person pushes on the box, but the box does not move. Is this situation an example of a force? (1 poin

Ostrovityanka [42]

Yes, this is an example of a force because a force is a push or pull.

3 0

2 years ago

A power drill uses 13.73 amps of current and has a power rating of 1140 watts. What voltage does the drill require

diamong [38]

7amps cause of how fast the drill is going

5 0

4 years ago

Read 2 more answers

Beaker contain 200 mL of water what is volume of water in cm cube and m cube

maksim [4K]

Part 1:

The basics of conversions state that:

1 ml is equivalent to 1 cm³

This means that the ratio between them is 1:1

Therefore, 200 ml of water would be equivalent to 200 cm³ of water

Part 2:

Again, the basics of conversion states that:

1 ml is equivalent to 1 * 10⁻⁶ m³

We will use cross multiplication to convert 200 ml to m³ as follows:

1 ml ................> 1 * 10⁻⁶ m³

200 ml .........> ??

200 ml = $\frac{200*1*10^{-6}}{1} = 0.0002$ m³

Hope this helps :)

6 0

3 years ago

Read 2 more answers