All categories

3 years ago

Which statement explains the relationship between the density of a material and its movement in Earth’s interior?

Physics

2 answers:

Elina [12.6K]3 years ago

7 0

B) Cooler materials are highly dense, causing them to sink to the outer core.

Illusion [34]3 years ago

5 0

Answer:

B) Cooler materials are highly dense, causing them to sink to the outer core.

Explanation:

i did the test T_T

You might be interested in

At time t=0 a positively charged particle of mass m=3.57 g and charge q=9.12 µC is injected into the region of the uniform magne

larisa [96]

Answer:

10.78 s

Explanation:

The force on the charge is computed by using the equation:

$F^{\to}= qE^{\to} +q (v^{\to} + B^{\to}) \\ \\ F^{\to} = (9.12 \times 10^{-6}) *278 (-\hat k) +9.12 *10^{-6} *2.1 *0.18 (\hat i * \hat k) \\ \\ F^{\to} = -2.535 *10^{-3} \hat k -3.447*10^{-6} \hat j$

F = ma

∴

$a ^{\to}= \dfrac{F^{\to}}{m}$

$a ^{\to}= \dfrac{-1}{3.57\times 10^{-3}}(2.535*10^{-3}\hat k + 3.447*10^{-6} \hat j)$

$a ^{\to}=-0.710 \hat k -9.656*10^{-4} \hat j$

At time t(sec; the partiCle velocity becomes $v(t) = 3.78 v_o$

The velocity of the charge after the time t(sec) is expressed by using the formula:

$v^{\to}= v_{o \ \hat i} + a^{\to }t \\ \\ \implies (2.1)\hat i -0.710 t \hat k -9.656 \times 10^{-4} t \hat j = 3.78 v_o \\ \\ \implies (2.1)^2 +(0.710\ t)^2+ (9.656 *10^{-4}t )^2 = (3.78 *2.1^2 \\ \\ \implies 4.41 +0.5041 t^2 +9.324*10^{-7} t^2 = 63.012 \\ \\ \implies 4.41 +0.5041 t^2 = 63.012\\ \\ 0.5041t^2 = 63.012-4.41 \\ \\ t^2 = \dfrac{58.602}{0.5041} \\ \\ t^2 = 116.25 \\ \\ t = \sqrt{116.25} \\ \\ \mathbf{t = 10.78 \ s}$

8 0

3 years ago

The energy required to start a reaction is called the activation energy. true false

Gemiola [76]

The energy required to start a reaction IS called the activation energy. TRUE

3 0

3 years ago

How is wavelength related to the different colors we see in a rainbow?

olga55 [171]

As the full spectrum of visible light travels through a prism, the wavelengths separate into the colors of the rainbow because each color is a different wavelength. Violet has the shortest wavelength, at around 380 nanometers, and red has the longest wavelength, at around 700 nanometers.

6 0

3 years ago

WILL GIVE BRAINLIEST AND 60 POINTS!

natali 33 [55]

Based on the list above the correct properties of solids are;

B) has a rigid shape that does not change easily

E) has particles that can wiggle but cannot move

Solids have a variety of properties that make them different from liquids and gasses. Their particles are fixed making them rigid and hard to change shape. The particles also have a low kinetic energy making it hard for the particles to vibrate. In addition to those properties, solids cannot be compressed into smaller sizes.

7 0

4 years ago

The 10-kg block is held at rest on the smooth inclined plane by the stop block at A. If the 10-g bullet is traveling at 300 m/s

Nadusha1986 [10]

Answer:

$d=6.874mm$

Explanation:

Linear momentum of the block is conserved in the $x\prime$ direction since the impulsive force due to impact cancels each other internally.

$m_bv_b_x=(m_b+m_B)v_x\\(0.01)(300cos 30\textdegree)=(10+0.01)v\\\therefore v=0.259548m/s$

Using the conservation of energy to the block system considering the initial position:

$T_1+V_1=T_2+V_2\\\\0+0.5(m_b+m_B)v^2=0+(m_b+m_B)gh\\0.5(10+0.01)(0.259548)^2=(0.01+10)(9.8)\\h=0.003437m\\\therefore h=3.437mm$

Applying Sine rule:

$d=\frac{h}{Sin 30\textdegree}\\d=6.874mm$

Hence, the distance the block will slide up is 6.874mm

5 0

3 years ago