All categories

3 years ago

True or False: The rock cycle is a slow process.

Physics

2 answers:

IrinaK [193]3 years ago

8 0

<span>The rock cycle is a slow process is true </span>

mart [117]3 years ago

8 0

This is <span>true.
</span>
Why?

Rock comes in many forms and is caused in different ways. Lava comes up from volcanoes (yes quickly) but what happens then? It is gradually eroded by weather. It breaks down into small rocks and stones and then into fine grains often forming very rich soil. Eventually, it reaches rivers where it is deposited as mud. Some carry on into the sea as salt. Both mud and silt solidify.

You might be interested in

A wire with a linear mass density of 1.17 g/cm moves at a constant speed on a horizontal surface and the coefficient of kinetic

stira [4]

Answer:

The value is $B = 0.2312 \ T$

The direction is into the surface

Explanation:

From the question we are told that

The mass density is $\mu =\frac{m}{L} = 1.17 \ g/cm =0.117 kg/m$

The coefficient of kinetic friction is $\mu_k = 0.250$

The current the wire carries is $I = 1.24 \ A$

Generally the magnetic force acting on the wire is mathematically represented as

$F_F = F_B$

Here $F_F$ is the frictional force which is mathematically represented as

$F_F = \mu_k * m * g$

While $F_B$ is the magnetic force which is mathematically represented as

$F_B = BILsin(\theta )$

Here $\theta =90^o$ is the angle between the direction of the force and that of the current

$F_B = BIL$

$BIL = \mu_k * m * g$

=> $B = \mu_k * \frac{m}{L} * [\frac{g}{I} ]$

=> $B = 0.25 * 0.117 * [\frac{9.8}{1.24} ]$

=> $B = 0.2312 \ T$

Apply the right hand curling rule , the thumb pointing towards that direction of the current we see that the direction of the magnetic field is into the surface as shown on the first uploaded image

8 0

3 years ago

Which of the following is a definite indicator of a chemical change?

Andrew [12]

Answer:

Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change.

Explanation:

3 0

4 years ago

Two objects have charges 2.0 C and 1.0 C. If the objects are placed 2 meters apart, what is the magnitude of the force that the

kondor19780726 [428]

Answer:

$4.5\cdot 10^9 N$

Explanation:

The electric force between two charged objects is given by:

$F=k\frac{q_1 q_2}{r^2}$

where:

k is the Coulomb's constant

q1 and q2 are the charges of the two objects

r is their separation

In this problem:

q1 = 2.0 C

q2 = 1.0 C

r = 2 m

So, the electric force is

$F=(9\cdot 10^9 Nm^2C^{-2})\frac{(2.0 C)(1.0 C)}{(2 m)^2}=4.5\cdot 10^9 N$

4 0

4 years ago

Select the options that best complete the statement.Positively charged particle trajectories(always, never, the same as)follow e

SpyIntel [72]

Answer:

a) always. b) electric field lines are defined by the path positive test charges travel.

Explanation:

By convention, field lines always follow the direction that it would take a positive test charge (small enough so it can´t disrupt the field created by a charge distribution), under the influence of an electric field, at the same point where the test charge is located.

So any positive charge, subject to an electric field influence, moves along the field line that passes through its current position, in the same way that a positive test charge would.

We could say also that the electric force on a positively charged particle is in the same direction as the electric field that produces that force (due to some charge distribution) , which is true, but it doesn´t explain why.

3 0

4 years ago

Why it is easier to lift a small stone but harder to lift heavy one on the surface of Earth

Nesterboy [21]

Answer:

since small stone has less mass so the gravitational pull of the earth is lesser in case of this but this is not for the bigger stone as the gravitational pull of the earth is greater...

PLEASE MARK BRAINLIEST!!!!!

8 0

3 years ago