In revolution, the earth revolves around the sun. In rotation, the earth rotates about its own axis.
Why is it important for body cell to have twice and many chromosomes as sex cells?
Answer:
Why sex cells only need half the number of chromosomes compared to other cells in the body? As gametes are produced, the number of chromosomes must be reduced by half. Why? The zygote must contain genetic information from the mother and from the father, so the gametes must contain half of the chromosomes found in normal body cells.
Explanation:
Brainliest Plzz
Answer:
During Mitosis, the chromosomes split at G2 Phase.
What is the specific heat capacity of a 250g object that needs 34.125kJ to have its own temperature raised by 65.0∘C
Answer:
Specific heat capacity, = 2.1J/g°C
Explanation:
Given the following data;
Mass = 250g
Quantity of heat = 34.125kJ = 34.125 * 1000 = 34125 Joules.
Change in temperature = 65.0∘C
To find the specific heat capacity;
Heat capacity is given by the formula;
[tex] Q = mcdt[/tex]
Where;
Q represents the heat capacity or quantity of heat.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.
Making c the subject of formula, we have;
[tex] c = \frac {Q}{mdt} [/tex]
Substituting into the equation, we have;
[tex] c = \frac {34125}{250*65} [/tex]
[tex] c = \frac {34125}{16250} [/tex]
Specific heat capacity, = 2.1J/g°C
Which is an example of physical weathering?
a- limestone in rock dissolving when acid rain flows across it
b- bits of rock rusting when exposed to oxygen and water
c- wind blowing off bits of a rock over time
d- oxidation of certain metals in rock
An example of physical weathering is the wind that is blowing off bits of a rock over time. This results into breaking down of large rocks. Thus, the correct option is C.
What is Physical weathering?Physical weathering is also called as mechanical weathering. It is a process which causes the disintegration of large rocks, minerals, and large soil particles without any chemical change. The primary process in physical weathering is the abrasion, it is the process by which clasts and other particles are reduced in size and mix up with soil.
Physical weathering occurs when large rocks are broken down through mechanical processes such as wind blowing, water, gravitational force, freeze-thaw cycles, or the growth of roots into the rocks.
Therefore, the correct option is C.
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Question 2 options:
A ________ is an ability that allows you to perform a specific task effectively.
Answer: The answer is Skill
Explanation:
If Mars were 10 times closer to the Sun, then the Sun would attract Mars with
times
(less or more) force.
Answer:
more
Explanation:
The velocity does not change greatly between Mars and Venus —explained Dong— but Venus's closer proximity to the sun boosts the density by almost a factor of 4.5. This would mean that atmosphere on Mars would be lost even more rapidly than at its current position.
What is 1.2 x 10^5 in standard form?
The standard form of the given exponential function is 120000.
By putting the number as a base and the number of repetitions as a little number to its upper right, a representation of repeated multiplications of the same number is known as an exponential form.
It is simpler to write repeated multiplication using base and exponents in the exponential form.
The equation f(x) = aˣ, in which the input variable x appears as an exponent and a as the base, describes an exponential function.
So, the given exponential function is,
1.2 x 10⁵
Here, 10 is the base and 5 is the exponent.
10⁵ = 100000
Therefore, the standard form of the given equation is,
1.2 x 100000 = 120000
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Which of the following best represents a chemical reaction?
A. Products + reactants
B. Products → reactants
C. Reactants
products
D. Reactants → products
Answer:
The answer to your question should be D.
Explanation:
reactants are on the laft side of arrow and products are on right side of arrow
The option that best represents a chemical reaction is Reactants → products. Thus, the correct option for this question is D.
What is a Chemical reaction?A chemical reaction may be defined as a methodology through which one or more substances that are also called reactants, are significantly transformed into one or more different substances which are known as products.
The involvement of these reactants and products are either chemical elements or compounds. The mass of the chemical reaction remains the same but the state of matter may be altered. Some chemical reactions also involved the utilization of catalysts in order to proceed with the reaction fast by lowering its activation energy.
Therefore, reactants → products is an option that best represents a chemical reaction. Thus, the correct option for this question is D.
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A train travels 4200 km in 90 hours. What is its speed?
Answer: I think its 120
Explanation: thx for the free points :)
A coin is dropped off of a building landing on its side. It hits with a pressure of 400/2 It hits with a force of 0.1 Calculate the area of the coin?
Complete Question:
A coin is dropped off of a building landing on its side. It hits with a pressure of 400 N/m². It hits with a force of 0.1N. Calculate the area of the coin?
Answer:
Area = 0.00025 m²
Explanation:
Given the following data;
Pressure = 400N/m²
Force = 0.1N
To find the area of the coin;
Pressure = Force/area
Area = Force/pressure
Substituting into the equation, we have;
Area = 0.1/400
Area = 0.00025 m²
b) The man has a mass of 85 kg. Gravitational field strength = 9.8 N/kg.
Calculate the weight of the man. Use the equation: weight = mass x
gravitational field strength
Answer:
mass× weight
85×9.5=807.5 kg
3. Gravitational potential energy depends on the ____ and _____ of the object
Imagine a universe in which, like in ours, there are two kinds of charges (positive and negative), with the like charges repelling and unlike charges attracting each other, but with the electric force somewhat different from Coulomb's Law. Instead of varying with inverse distance squared, the force between charges in this imagined world would vary with the inverse distance cubed. In such a universe, would the static charges still always be distributed on the surfaces of conductors?
Answer:
the static charge is not always distributed on the surface of the conductor, there are also charges in the volume but of lesser magnitude
Explanation:
In this hypothetical system the electric force is of type
F = [tex]k' \frac{q_1 q_2 }{r^2}[/tex]
in this case the force decays to zero much faster,
if we call Fo the force of Coulomb's law
F₀ = [tex]k \frac{q_1 q_2 }{r^2}[/tex]
assuming the constant k is the same
the relationship between the two forces is
F / F₀ = 1 / r
F = F₀ / r
when analyzing this expression the force decays much faster to zero.
In an electric conductor, charges of the same sign may not feel any repulsive force from other charges that are at a medium distance, so there is a probability that some charges are distributed in the volume of the material, this does not happen with coulomb's law
Consequently, the static charge is not always distributed on the surface of the conductor, there are also charges in the volume but of lesser magnitude
5.Noise pollution is harmful forRequired to answer. Single choice.Immersive Reader
(1 Point)
Human
Cat
Bird
All
Answer:
D: All
Explanation:
In cats, noise pollution causes what is known as acoustic stress in them.
In birds, noise pollution delays their nesting because it makes their songs which they use to probe to be at a low frequency.
Noise pollution affects humans because it can lead to loss of hearing, sleep disturbance, stress, high blood pressure e.t.c
Therefore, it affects Cats, birds and humans.
So option D is correct.
1. Which of the following is an example of a force?
-0.1 Newtons to the left
-5 m/s/s
-0.5 m/s/s
-10 Newtons
A 2000 g of C 14 is left to decay radioactively the half-life of Corbin 14 is approximately 5700 years what fraction of that sample remain after 17,100 years
Answer:
1/8
Explanation:
17,100 years is 3 times the half-life of 5,700 years. After each half-life, half remains, so the amount remaining after 3 half-lives is ...
(1/2)(1/2)(1/2) = 1/8
1/8 of the sample remains after 17,100 years.
Answer:
1/8
Explanation:
Could somebody pls help me out with this?
1) You serve a Volleyball with a mass of 1.6kg. the ball leaves your hand with a speed of 25m/s. the ball has________energy. Calculate it.
2) Askateboard is sitting at the top of a hill that is 26m high. the skateboard weighs 2 N. the skateboard has _____energy. Calculate it.
identify a source of microwaves
Explanation:
Microwave sources include artificial devices such as circuits, transmission towers, radar, masers, and microwave ovens, as well as natural sources such as the Sun and the Cosmic Microwave Background. Microwaves can also be produced by atoms and molecules.
Answer:
Stars, including the Sun, are natural microwave sources.
Explanation: Under the right conditions, atoms and molecules can emit microwaves. Man-made sources of microwaves include microwave ovens, masers, circuits, communication transmission towers, and radar. Either solid state devices or special vacuum tubes may be used to produce microwaves.
1. Acceleration can result from a change of _______, or a change in ___________, or both *
distance, direction
temperature, volume
speed, direction
force, momentum
2. The acceleration is _______ when an object is speeding up. *
positive
negative
zero
constant
2. The acceleration is _________ when an object is slowing down. *
positive
negative
zero
constant
3. When an object is moving at a constant speed, its acceleration is ________. *
positive
negative
zero
constant
4. A roller coaster is moving at 35 m/s at the bottom of a hill. Four seconds later it reaches the top of the hill moving at 7 m/s. What was the acceleration of the coaster? Include: the formula, the work, the units, and mention if the object was accelerating or decelerating. *
5. A train moves from stop to a speed of 30 m/s in 25.0 seconds. What is its acceleration? Include: the formula, the work, the units, and mention if the object was accelerating or deccelerating. *
6.How long will it take a car to go from a complete stop to 33 km/hr if they are accelerating at 11 km/hr2? Include: the formula, the work, the units, and mention if the object was accelerating or deccelerating.
7.A train was going 100 m/s hit the brakes after seeing a deer who decided to have a nap on the train tracks. It took the train 1 minute 40 seconds to stop, what was the train’s acceleration? Include: the formula, the work, the units, and mention if the object was accelerating or deccelerating.
8. Write a short story that contain an acceleration/decceleration problem. Include numbers and units and solve for the unknown according to your story. Make sure to include the formula, the work, and the right units. *
Answer:
not sure
Explanation:
jahhhhhsjjjjdddddhdhdj hbdbd#dialectical DHL I have no clue W Bush administration and I don't have any jshshhhhdgggddddddd the entire community was literate because
a. they had been slaves and had not been to school
b. they were too poor to go to school
c. work was more important to them than education
d. they avoided to going school
the entire community was literate because
a. they had been slaves and had not been to school
b. they were too poor to go to school
c. work was more important to them than education
d. they avoided to going school
the entire community was literate because
a. they had been slaves and had not been to school
b. they were too poor to go to school
c. work was more important to them than education
d. they avoided to going school
the entire community was literate because
a. they had been slaves and had not been to school
b. they were too poor to go to school
c. work was more important to them than education
d. they avoided to going school
jsbsbd the entire community was literate because
a. they had been slaves and had not been to school
b. they were too poor to go to school
c. work was more important to them than education
d. they avoided to going school
the entire community was literate because
a. they had been slaves and had not been to school
b. they were too poor to go to school
c. work was more important to them than education
d. they avoided to going school
the entire community was literate because
a. they had been slaves and had not been to school
b. they were too poor to go to school
c. work was more important to them than education
d. they avoided to going school
the entire community was literate because
a. they had been slaves and had not been to school
b. they were too poor to go to school
c. work was more important to them than education
d. they avoided to going school
BFF and I don't have any questions please call her and her husband to the hospital for a bit more time with my family grew up in the form of a ring whose inner circumference is it a lot of people who are you doing today beautiful and I don't have any questions please call her and her husband to the
Changes in the Moon’s position as it revolves around the Earth results in more or less of the sunlight __________from the Moon being visible when observing the Moon from the Earth. This causes the Moon to appear to change shape from Earth. *
Answer:
reflection of the moon, or just reflection
Explanation:
when the sunlight hits the moon, it refects back to earth making the moon appear to glow
Answer:
reflecting
Explanation:
the sun's light reflects off the moon, making the moon visible
In the image is a type of energy? What is it?
HELP WILL GIVE BRAINLIEST
Which of the following adaptations would most likely help an animal survive the stressful environmental conditions found in the
Arctic?
OA
Ducks have webbed feet and an elongated body
OB.
Rattlesnakes have modified scales on the tips of their tails that form a rattle.
OC.
Bats can emit high-pitched sounds and navigate by echolocation
OD.
Reindeer have dense, woolly fur and hooves with high traction
Answer:
Reindeer
Explanation:
High traction to walk on ice
Woolly fur to keep warm
Answer:
Reindeer have dense, woolly fur and hooves with high traction.
Explanation:
A 1500kg car is moving uniformly at 10 m/s2 down the road for 1250 meters in 60 seconds. How much power did the car have during this time?
Answer:
[tex]3.125\times 10^{5}watt[/tex]
Explanation:
We are given that
Mass of car, m=1500 kg
Acceleration,[tex]a=10m/s^2[/tex]
Distance, s=1250 m
Time, t=60s
We have to find the power of car during this time.
We know that
Force, F=ma
Using the formula
[tex]F=1500\times 10=15000N[/tex]
Work done, W=Fs
Work done, W=[tex]15000\times 1250[/tex]
Power, P=[tex]\frac{work\;done}{time}[/tex]
Using the formula
Power, P=[tex]\frac{15000\times 1250}{60}[/tex]
Power, P=312500watt
Power, P=[tex]3.125\times 10^{5}watt[/tex]
I AM TIMED !! 30 POINTS Which is the smallest possible particle of an element?
O molecule
O atom
O compound
O matter
Answer:
atoms
Explanation:
they are the smallest
Q.1- A 3000 cm3 tank contain O2 gas at 20 °C and a gauge pressure of 2.5 x 106 Pa. Find the mass of oxygen in the tank.
A box has a 20 N force applied to it to move it 5 m. What is the work done on the box? 4 J 4 N 25 J 100 J
4.
State the laws of reflection.
What are your initial thoughts on pro athletes salaries? Do you believe that athletes are paid too much? Why or why not
Answer:
Pro athletes are professional athletes, they are professional in their field. They are not paid too much in my thoughts.
Explanation:
I do not believe that professional athletes are paid too much or over paid. These group of athletes have become professionals in their fields after many years of training, they are highly talented with extra ordinary physical abilities. More so, fans love to watch them play and pay to watch them because they enjoy them. They are get sponsors due to the great crowd they attract.
How much force is needed to move a 0.1 kg snowball at a rate of 15 m/s² upward?
Answer:
The needed force is "1.5 Newtons". A further solution is provided below.
Explanation:
The given values are:
mass,
= 0.1 kg
acceleration,
= 15 m/s²
As we know,
⇒ [tex]Force= mass\times acceleration[/tex]
On substituting the given values, we get
⇒ [tex]=0.1\times 15[/tex]
⇒ [tex]=1.5 \ Newtons[/tex]
This image shows layers underground.
Top to bottom: Soil, Clay, Rocks, Granite.
Which layer will become saturated first when rain falls?
clay
granite
rocks
soil
Answer:
soil
Explanation:
CORRECT
Answer:
soil
Explanation:
Hope this will help
Please help me with this
Answer:
The most correct option for the magnitude of the velocity of the ship relative to the port is;
33 km/h
Explanation:
The given parameters of the cargo ship are;
The speed of the cargo ship = 25 km/h
The direction of the cargo ship, θ₁ = 20° North of East
The speed of the current = 10 km/h
The direction of the current, θ₂ = 15° North of East relative to the port
Therefore the direction of the ship relative to the port, 'θ', is given as the sum of θ₁ and θ₂ as follows;
θ = θ₁ + θ₂ = 20° + 15° = 35°
The component of the velocities relative to the port are given as follows;
The velocity of the ship, v₁ = 25·cos(35°)·i + 25·sin(35°)·j
The velocity of the current , v₂ = 10·cos(15°)·i + 10·sin(15°)·j
The velocity of the ship relative to the port, v = (25·cos(35°) + 10·cos(15°))·i + (25·sin(35°) + 10·sin(15°))·j
∴ v ≈ 30.14·i + 16.93·j
The magnitude of 'v' is [tex]\left | v \right |[/tex] = √(30.14² + 16.93²) ≈ 34.6
Therefore, the magnitude of the velocity of the ship relative to the port, [tex]\left | v \right |[/tex] ≈ 34.6 km/h.
Therefore, the closest correct option for the velocity of the ship relative to the port is 33 km/h
Answer:
The correct option for the magnitude of the velocity of the ship relative to the port is...
(33 km/h)