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3 years ago

The density of an object is how much matter it contains. True or False?

Physics

2 answers:

vlabodo [156]3 years ago

8 0

Answer:

true

Explanation:

Diano4ka-milaya [45]3 years ago

5 0

Answer:

True

Explanation:

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If the force being applied to an object is doubled, what will happen to its<br> acceleration?

Minchanka [31]

Answer:

Acceleration decreases.

Explanation:

Hope this helps you.

4 0

4 years ago

A 4.00-g lead bullet is traveling at a speed of 200 m/s when it embeds in a wood post. If we assume that half of the resultant h

Sergeeva-Olga [200]

Answer:

ΔT = 78.32 °C

Explanation:

Kinetic energy of bullet is K

K = mv²/2

= .004 * ( 200 m/s )²/2

= 80 J

Half of the heat E = 40 J

Now a per the equation of energy transferred ,

E = cm ΔT

c is the specific heat of latent, m is the mass and ΔT is the change in temperature.

ΔT = 40 / ( .0305 × 4186 × .004)

ΔT = 78.32 °C

4 0

4 years ago

A woman can see clearly with her right eye only when objects are between 45 cm and 155 cm away. Prescription bifocals should hav

Yuri [45]

Answer:

Explanation:

given,

A woman can see object between 45 cm and 155 cm

glasses is 2 cm from the eye

to able to read a book distance = 25 cm

For the object distant apart

$\dfrac{1}{f}= \dfrac{1}{p} +\dfrac{1}{q}$

$\dfrac{1}{f}= \dfrac{1}{\infty}+\dfrac{1}{-153}$

$\dfrac{1}{f} = - 6.53 \times 10^{-3}$

hence, D = - 0.653 m

For the object at the near point

$\dfrac{1}{f}= \dfrac{1}{p} +\dfrac{1}{q}$

$\dfrac{1}{f}= \dfrac{1}{23} +\dfrac{1}{-43}$

$\dfrac{1}{f}= 0.0202 cm$

hence, D = 2.02 m

8 0

3 years ago

10. Find the mass density of a ball with 22.0 g and a radius of 0.875 cm.

Ede4ka [16]

Answer:

Mass (m) = 22.0 g

Radius (r) = 0.875 cm

Density (d) = ?

First find ( volume) ;

$v = \frac{4}{3} \pi \: {r}^{3} \\ \\ v = \frac{4}{3} \times 3.14 \times ( {0.875)}^{3} \\ \\ v = \frac{4}{3} \times 3.14 \times 0.66992187 \: {cm}^{3} \\ \\ v = 2.8 \: {cm}^{3}$

$Density = \frac{mass}{volume} \\ \\ d = \frac{m}{v} \\ \\ d = \frac{22}{2.8} \\ \\ d = 7.857 \: \frac{g}{ {cm}^{3} }$

I hope I helped you^_^

7 0

3 years ago

Note: Plagiarism will be reported

iren [92.7K]

Y no me han dicho que me ha dado un teléfono y me ha dicho la policía que han dado la cara para la que ha sido un policía que han dicho nada que no se han dado cuenta de

6 0

3 years ago

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