Answer: D
Explanation:
Hot magma erupts from a crack in Earth’s crust with a very high temperature that will surely break the bond of water molecules in contact. As a result of this, The water molecules will become less dense and rise upward.
Therefore, "The water will become less dense and rise upward " is the best statement to describes what will happen to the seawater above the crack as a result of convection.
The water will become less dense and rise upward because less denser materials move upward and more denser comes downward.
What will happen to the seawater above the crack as a result of convection?The seawater will become less dense and rise upward above the crack as a result of convection because water is less denser and the magma that erupts from the crack is denser due to its high viscosity.
So we can conclude that the water will become less dense and rise upward because less denser materials move upward and more denser comes downward.
Learn more about convection here: https://brainly.com/question/9382711
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As hotter material _______, ________material sinks. a. Sinks, colder b. Rises, warmer c. Rises, colder d. Sinks, warmer
Answer:
C
Explanation:
Hot air rises because when you heat air (or any other gas for that matter), it expands. When the air expands, it becomes less dense than the air around it. The less dense hot air then floats in the more dense cold air much like wood floats on water because wood is less dense than water.
As hotter material gets colder it will sinks down. In the hotter state the molecules gets energetic and gets far apart making them free to rise in the air. Thus option a is correct.
What is sinking ?Hot air is less dense than cold air, which is why hot air rises and cold air descends. The earth's weather is controlled by hot and cold air currents. The planet is heated primarily by the sun, which also generates the planet's hot and cold air energy systems.
Since warm air currents originate over oceans, they frequently bring rain. Tropical storms and hurricanes develop at sea and eventually travel near land for this reason.
As hot air from the earth's surface rises, it rapidly turns into cold air as it approaches space. As hot air cools, it descends back to the earth's surface, where it is warmed by the ocean before rising once more. An example of this is a convection current. Thus, option a is correct.
Find more on colder air :
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if earth were not tilted, would we still have seasons?
Answer:
Glad you asked that!
Explanation:
Actually,no.You see,if the earth was perfectly straight,then the northern hemisphere and southern hemisphere would have the same seasons,which is pretty much the world.But our world is tilted,so we happen to have differences for southern hemisphere and northern hemisphere.
Which of the following is an example of a device that uses a wheel and axle?
Check all that apply
A. frisbee
B. light bulb
C. doorknob
D. bicycle
(multiple answers)
if san andreas fault slips 2.5 cm each year how far would it separate in 100 years
Answer:
250cm or 2.5m
Explanation:
using direct variation
the length is = l
the time (year) = t
let k be the constant
so he have:
l=kt
2.5=k× 1
k= 2.5
Now in the next statement the 100 is given but not the length so
l=kt
~ l=k× 100 years
But k = 2.5
so :
l= 2.5×100
l= 250 cm
Hence it will be 250cm or 2.5m at which they will get separated
How does population density differ from population size?
а. Population size takes all organisms into account while population density only takes specific age
groups of the population into account
b. Population size is the total number of organisms, while population density is the total number of
organisms within a given area
C Population size is the total number of organisms within a given area, while population density is the
total number of organisms of a specific age
d. Population size is the total number of organisms of all species, while population density is the total
number of organisms of a specific species
Answer: B
Explanation:
Population size focuses on the size of the population. That is, the total number of organisms in a population.
While population density focuses on the density of the population. That is, mean number of organisms per unit area or volume.
Therefore, Population size is the total number of organisms, while population density is the total number of
organisms within a given area
formular for calculating resistors in parallel
Answer:
Answer is 1/RT=1/RT1+1/RT2+1/RT3
Which converts mechanical energy to electrical energy?
A. A flashlight
B. An electric motor
C. A generator
D. An electromagnet
Answer:
c. A Generator
Explanation:
The whole point of a generator is to produce electrical energy. The generator will use a mechanical motor usually running off of gas to produce electricity.
Light rays travel along _____ paths. A. curved B. straight C. changing D. unpredictable
Answer: Straight :)
Explanation:
LIght rays travel in straight paths and it is impossible for them to travel in curved, unpredictable, and changing paths
Use the following to answer question 46
I . increase the current
II. use a stronger magnet
III. use thicker wire
IV. reverse the battery
V. add more coils of wire inside the magnet
46. To increase the force with which the wire is pushed when the switch is closed, which of
the following things could be done?
a. I and II only
b. II, III, and IV only
C. II and IV only
d. I, II and V only
47. A group of students had built a homemade motor and were in the process of trying to
test it. When they hooked it up to their battery they found that the wires in their coil got hot, but the coil would not turn. Of the following solutions, which would be their best
course of action to make the motor spin?
a. add more wire to the coil
b. use a stronger magnet
C. use a higher voltage battery
d. plug into an AC source
Answer:
46.) A
47.) A
Explanation:
46.) To increase the force with which the wire is pushed when the switch is closed, the current flowing through the wire should be increased and the stronger magnet should be used.
Remember that
F = BIL
The force is directly proportional to magnetic field B and current I
a. I and II only
47.) Since the wires in their coil got hot, and the coil would not turn, this is overheating which may be as a result of to much voltage supply compare to the length of the length of the coil of wire. To correct this, more wire should be added to the coil.
What happens when tectonic plates move away from each other? Molten matter cools and sinks towards the core. Lava travels away from the crust and forms the mantle. Molten matter seeps through the crust and forms new land. Lava seeps into the ground through the cracks in the ground.
Circuit questions. Plz help. Only answer is ok
How do Newton's laws of motion explain why it is important to keep the ice smooth on a hockey rink so that players can
pass a puck as quickly as possible?
OSmooth ice reduces the inertia of the hockey puck.
Smooth ice increases the force used to accelerate the hockey puck.
Smooth ice reduces the unbalanced forces that would slow the hockey puck.
Smooth ice decreases the reaction force that the ice exerts on the hockey puck.
Save and Fxit
Answer:
c
Explanation:
edge 2021
List the 2 advantages and 2 disadvantages of wind as a source of electricity.
Answer:
The first 2 advantages of wind a source of electricity is that it provides you wifi and wind. 2 disadvantages of wind as a source of electricity is that to much wind could knock it down or slow down the source of the electricity.
Explanation:
I know this because i read a article on it.
Spaceship 1 and Spaceship 2 have equal masses of 300kg. They collide. Spaceship 1's final speed is 3 m/s, and Spaceship 2's final speed is 2 m/s in the same direction. What is their combined momentum? A. 600 kg-m/s B. 1,500 kg-m/s C. 1,200 kg-m/s D. 900 kg-m/s
Answer:
B. 1500 kg*m/s
Explanation:
Momentum p = m* v
In any type of collision, the total momentum is preserved!
The total momentum before and the total momentum after the collision is the same. We know the mass and speed after the collision so we can calculate the total momentum.
p1 + p2 =
m1*v1 + m2*v2
m1 = me = 300 kg
v1 = 3 m/s
v2 = 2 m/s
Substitute the given numbers:
300*3 + 300+2
900 + 600
1500 kg*m/s, which is answer B.