Answer:
The generation of Earth's magnetic field starts at its very center. Some researchers believe polarity reversals are caused by a disturbance in the balance between Earth's rotation and the temperature at the core, which alters the fluid motion of the liquid iron, but the exact process remains a mystery.
do all objects have inertia
a) true
b) false
Answer:
The answer is A. Which is true
What are the properties of a concave mirror
Answer:
Concave mirrors produce real and virtual images.
Explanation:
(Concave mirrors can produce both real and virtual images)
They can be upright (if virtual) or inverted (if real)
They can be behind the mirror (if virtual) or in front of the mirror (if real)
T hey can also be enlarged, reduced, or the same size as object.
Answer:
Some properties of the given mirror are summarized in the below portion.
Explanation:
Unless the material is dropped between some of the focus as well as the mirror:Throughout that particular instance, the ground image component is immersive but instead larger than those of the attribute and it has a similar orientation as the attribute.
Unless the object is located between some of the center point of that same mirror as well as the focus area:Throughout this particular instance, the mirror version is genuine and larger than that of the attribute. In additament, the image formation was therefore reversed.
State the meaning of specific heat capacity of copper is 380 J/kg°C.
Answer:
Specific heat capacity means that in order to raise copper by 1C per kg, it needs 380J of heat energy.
Atoms have no electric charge because they
A. Have an equal number of charged and non charged particles.
B. Have neutrons in their nuclei.
C. Have an equal number of electrons and protons
D. Have an equal number of neutrons and protons
Atoms have no electric charge because they have an equal number of electrons and protons.
Explanation:
Atom is the smallest unit of matter.It is comprised of three subatomic particles: protons, electrons, and neutrons.Electrons are found outside the nucleus of an atom and are negatively charged.Protons are found inside the nucleus of an atom and are positively charged.Neutrons are found inside the nucleus of an atom and have no charge.They are electrically neutral because they have an equal number of protons and electrons.So from this, we can conclude that atoms have no electric charge because they have an equal number of electrons and protons. Option C is correct.
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why is an inflated balloon likely to burst if you leave it near a window with the sun streaming in it?
Answer:
Because the plastic of the balloon will eventually get to such I heat the radiation from the sun would cause it to pop
Explanation:
that is my answer
Answer:
because the heat melts the rubber and when it does it pops when it gets to hot
Explanation:
Ifa cup of coffee is at 90°C and a person with a body temperature of 36°C touches it, how will heat flow between
them?
O from the hand to the cup
O from the cup to the hand
O from the cup to the surrounding air
O from the hand to surrounding air
How do labels protect us at the grocery store? Will gove Brainliest to RIGHT answer :)
to guide us on where stuff are or what the stuff are called and used for
4. During which three months is the difference the same between average high temperature and average low temperature?
Answer:
1 Inch and 20 F
Explanation:
Boo help me please!!!!!!!
Answer:
??
Explanation:
A square tile having 50cm side is made to withstand a pressure of 200N/m^2 find out if a force of 45N can be applied on the tile
Explanation:
Given that,
Side of a square tile, a = 50 cm = 0.5 m
Pressure withstand by it, P = 200 Pa
We know that,
Pressure = force/area
[tex]F=P\times A\\\\=200\times (0.5)^2\\\\=50\ N[/tex]
It is the force that tile withstand is 50 N. The force applied upon the time is 45 N. As 45 N can be applied on the tile because 45 N < 50 N.
Calculate the magnitude of the gravitational force between Goku with a mass of 62 kg and King Kai’s planet with a mass of 1.458x1015 kg if the distance between their centers of mass is 31 m.
Answer:
6227.866 N
Explanation:
F = G . m(goku) . m(planet) / d²
F = 6.674 x 10-¹¹ x 62 x 1.458 . 10¹⁵ / 31²
F = 6227.866 N
A box slides down a ramp inclined at 24◦ to the horizontal with an acceleration of 1.7 m/s 2 . The acceleration of gravity is 9.8 m/s 2 . Determine the coefficient of kinetic friction between the box and the ramp.
Answer:
0.445Explanation:
In friction, the coefficient of friction formula is expressed as;
[tex]\mu = \frac{F_f}{R}[/tex]
Ff is the frictional force = Wsinθ
R is the reaction = Wcosθ
Substitute inti the equation;
[tex]\mu = \frac{Wsin \theta}{W cos\theta} \\\mu = \frac{sin \theta}{cos\theta} \\\mu = tan \theta[/tex]
Given
θ = 24°
[tex]\mu = tan 24^0\\\mu = 0.445\\[/tex]
Hence the coefficient of kinetic friction between the box and the ramp is 0.445
Why is thermal energy from the Sun transferred to Earth through electromagnetic waves instead of any other type of thermal energy transfer?
Electromagnetic waves can carry energy through matter.
Electromagnetic waves can travel through empty space.
Electromagnetic waves can move through gases faster than other types of energy transfer.
Electromagnetic waves can move more energy than other types of energy transfer.
Answer:
Electromagnetic waves can travel through empty space.
Explanation:
Electromagnetic waves are defined as the waves that are created due to the vibrations between a magnetic field and an electric field.
Earth atmosphere is made up of several gases and spaces between them. Thermal energy from the sun require to pass through space by electromagnetic radiation. Electromagnetic waves can travel through empty space and that is why other type of waves are unable to transfer thermal energy.
Hence, the correct answer is "Electromagnetic waves can travel through empty space".
Answer:
Electromagnetic waves can travel through empty space.B.Explanation:
Please answer faast!!!
Answer:
Any medium or material of high refractive density e.g Water which refracts the light rays 1&2 away from their normal
A 4.0 kg object will have a weight of approximately 14.8 N on Mars. What is the gravitational field strength on M
Answer:
Gravitational field strength =weight/mass
Explanation:
14.8N/4.0kg
3.7N/kg
An elevator car has a mass of 750 kg, and its three passengers have a combined mass of 135 kg. If the elevator and its passengers ride to the ground floor, 20.7 m below, find the change in gravitational potential energy of the car and its passengers. Show all your work.
Answer:
The change in gravitational potential energy is -1.80x10⁵ J.
Explanation:
The change in gravitational potential energy is given by:
[tex] \Delta E_{p} = E_{p_{f}} - E_{p_{i}} [/tex]
[tex] \Delta E_{p} = mgh_{f} - mgh_{i} [/tex]
Where:
"i" is for final and "f" for final
m: is the mass
g: is the gravity = 9.81 m/s²
h: is the height
For the car and the passengers we have:
[tex] \Delta E_{p} = m_{T}g(h_{f} - h_{i}) = (750 kg + 135 kg)9.81 m/s^{2}(0 - 20.7 m) = -1.80 \cdot 10^{5} J [/tex]
The minus sign is because when the elevator car and the passengers are up they have a bigger gravitational potential energy than when they are in the ground.
Therefore, the change in gravitational potential energy is -1.80x10⁵ J.
I hope it helps you!
Two tougboats are toeing a ship each exerts a force of 6000N and the angle between the two ropes is 60 calculate the resultant force on the ship
Answer:
10392.30N
Explanation:
We proceed by computing the individual force exerted by the boats
For the first boat
The angle is 30 degree to the vertical
Hence
Force = F cos θ
F=6000 cos 30
F=6000*0.866
F=5196.15 N
Since the boats are two and also at the same angle and also exerting the same force
The Net force = 2*5196.15
Net force=10392.30N
how much kinetic energy does an object at rest have ?
Answer:
None
Explanation:
Because an object only has kinetic energy when in motion.
Answer:
0
Explanation
If its at rest there is no kinetic energy
A ball having a mass of 0.20 kilograms is placed at a height of 3.25 meters. If it is dropped from this height, what will be the kinetic energy of the ball when it reaches 1.5 meters above the ground?
A.
1.2 joules
B.
2.2 joules
C.
3.4 joules
D.
3.6 joules
E.
4.3 joules
Answer:
C.
3.4 joules
Explanation:
Answer for Plato and edmentum
Which of the following will change the strength of a magnetic field?
1.increase speed
2.change the amount of electric current
3.remove atoms
4.it is always the same
2. change the amount of electric current
A. about 1.8
B. about 9.1
C. about 18.1
D. about 28.3
Please help me
Answer:(b)
Explanation:
Given
GK=16 units
KH=y units
using Sine rule
[tex]\frac{\sin G}{y}=\frac{\sin H}{16}\\\frac{\sin 30^{\circ}}{y}=\frac{\sin 62^{\circ}}{16}\\y=16\times \frac{\sin 30^{\circ}}{\sin 62^{\circ}}\\\\y=16\times \frac{0.5}{0.883}\\y=9.06\ \approx \ 9.1\ units[/tex]
the diagram shows a force being applied to a lever to lift a heavy weight. What change would enable the heavy weight to be lifted with a smaller force
Move the force to the right.
A force of 0.8 newton causes a spring to extend by 4 cm. What is the spring constant?
20 N per meter
56 N per meter
32 N per meter
40 N per meter
Answer:
20 N per meter
Explanation:
k = Fe
f = 0.8N
e = 4cm change to m = 4 ÷ 100 = 0.04
0.8 ÷ 0.04 = 20 N per meter
give the relation of resistance of wire with the length and thickness.
Answer:
The answer to this question is given below in the explanation section.
Explanation:
Give the relation of resistance of wire with the length and thickness:
Resistance:
There is a resistance to the flow of an electric current through most conductors.
The length of wire increases
The thickness of wire decreases
The resistance of a long wire is greater then the resistance of a short wire because electrons collide with more ions as they pass through.
The relationship between resistance and wire length is proportional. The resistance of thin wire is greater then the resistance of a thick wire because a thin wire has fewer electrons to carry the current.The relationship between resistance and the area of the cross section of wire is inversely proportional.
When you're super tired and you lose energy, what energy are you actually losing?
I said Physics class, but it's really for Science class.
Answer:
it is chemical energy
Explanation:
that is the energy used by our body, so it is the one that we will loose. and the energy that we gain is also chemical energy
What happens if all the heat energy contained in a body is removed? and what will be it's temperature?Explain
Answer:
If all the heat energy contained in a body is removed and changes in its temperature is described below in detail.
Explanation:
It moves from a body at a greater temperature to a body at a cheaper temperature. All element survives as solids, liquids, or gases. The material can transfer from one station to another if warmed or cooled. When heat is provided to a body its heat increases: When a physical body, hard, liquid. When heat is provided is stopped to a body its temperature decline.
A student who weighs 500 N on Earth travels to a planet whose mass and radius are twice that of Earth. His weight on that planet is about
A. 1000 N
B. 500 / V2 N
C.500 N
D. 250 N
Answer:
B
Explanation:
Weight of the student on that planet is about 250 N. option (D) is correct.
What is Newton’s universal law of gravitation?Newton's universal law of gravitation states that the force of attraction between any two bodies is inversely proportional to the square of the distance between them and directly proportional to the product of their masses.
Let the mass of the student be m.
Mass of the Earth = M.
Radius of the Earth = R,
So, gravitational force applied on the student on Earth surface :
GMm/R² = 500 N.
Again,
mass of the planet = 2M
Radius of the planet = 2R.
So, gravitational force applied on the student on the surface of the planet = G(2M)m/(2R)²
= 1/2 {GMm/R²
= 1/2 × 500 N
= 250 N.
Hence, His weight on that planet is about 250 N. option (D) is correct.
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Pollen is one celled, or unicellular. It is used for reproduction in many types of plants. The bee is collecting nectar and, while doing that, is transferring the very tiny pollen grains The bee and the flowering plant are multicellular organisms, but they both have many things in common with the unicellular pollen What is one feature NOT shared by all three! All are made of one or more cells. The cells of each contain genetic material The cells of each contain exactly the same parts A cell membrane controls what goes in and out of the cells 9 Hierarchical Organisation SA PREP ITEST PREP PAX 1-877.816-0808 PHONE 1-877.377.953 Read Our Blog Meet Our Teachers Privacy Policy O USA Testprep LC 2030 A Rights Reserved
Answer:
This question is unclear, however, the answer to the initial clear part is:
The cells of each contain exactly the same parts
Explanation:
Thee three organims/structures mentioned in this question are: bees, flowering plants and pollen. Based on the information provided in the question, they all contain one (unicellular) or more (multicellular) cells.
However, considering the fact that bees are made up of animal cells while pollen and flowering plants are made up of plant cells, the cells of each will not contain exactly the same parts. For example, bees do not have chloroplasts in their cells while flowering plants do.
How much power does a machine have that does 15204 J of work in 40 seconds?
Explanation:
since P=W/t
P=15204/40
P=380.1 Watt
The moon is significantly smaller than the sun. Why is the moon able to fully block the sun from our view on
Earth?
Answer:
The moon is 400x smaller but it's also 400x closer so it looks the same size even though it's not
Explanation:
To solve this we must be knowing each and every concept related to moon. Therefore, the moon is able to fully block the sun from our view on earth as it is 400 times.
What is moon?Any celestial object that revolves around a planet, such as the eight main planets, dwarf planets, or minor planets, is referred to as a moon. In order to distinguish the moon from other celestial bodies that circle other bodies, the term "natural satellite" may also be used to describe the moon.
The Galilean moons orbiting Jupiter, called after astronomer as well as discoverer Galileo Galilei, were the first moons found outside of the moon of Earth. The moon is significantly smaller than the sun. The moon is able to fully block the sun from our view on earth as the moon appears the same size despite the fact that it's 400 times smaller because it is 400 times closer and hence smaller.
Therefore, the moon is able to fully block the sun from our view on earth as it is 400 times.
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