Answer:
1. science
2. advances in a science may lead to advances in technology and vice versa
3. they help visualize things that are very complex, very large, or very small
4. independent
5. inference
6. by publishing articles in scientific journals
by giving talks at scientific conferences
7. they all use SI system
8. a process in which scientists examine other scientists work
9. scientist receive questions and criticism from their peers
10. social science
11. forces cause changes in motion
12. drawing conclusions
analyzing data
revising a hypothesis
13. the hypothesis is revised
14. a scientific law
15. Kelvin
Explanation:
1.
The system of knowledge and the methods used to find that knowledge is referred to as science
2.
Science and Technology are related in that advances in a science may lead to advances in technology and vice versa
3.
Scientific models are important because they help visualize things that are very complex, very large, or very small
4.
The variable that is purposely changed and that you wish to test is called the independent variable.
5. An explanation that tries to make sense of your observations based on personal experience and prior knowledge is called inference
6. There are a number of possible ways that scientists can use to communicate the results of an investigation;
by publishing articles in scientific journals
by giving talks at scientific conferences
7. Scientists who speak different languages make their data understandable to one another through the use of the SI system .
8. The term peer review refers to a process in which scientists examine other scientists work for the purpose of questioning or criticism.
9. One reason that makes peer reviews important is;
Scientist are able to receive questions and criticism from their peers on a particular work of research.
10. The branches of natural science include;
life science
earth science
physical science
11. One of the main ideas of physical science is that forces cause changes in motion
12. The main steps of the scientific methods include;
drawing conclusions
analyzing data
revising a hypothesis
13. What happens when the data in an investigation does not support the original hypothesis;
the hypothesis is revised
14. What is a statement that summarizes a pattern found in nature?
a scientific law
15. What is the SI units of Thermodynamic temperature?
Kelvin
In the equation Q=mcΔT,Q represents
A.) The mass substance being heated
B.) The thermal energy
C.) The specific heat of the substance being heated
D.) Temperature measured in degrees C
Answer:C
Explanation:
The specific heat capacity of the substance
In the equation Q=mcΔT, Q represents the specific heat of the substance being heated.
What is the heat capacity formula?The heat Capacity formula is expressed as the product of mass, specific heat, and change in the temperature which is mathematically given as:Q = mcΔT
Where,
Q = capacity in Joules
m = mass in grams
c = specific heat of an object in J/g °C
ΔT = change in the temperature in °C
The heat capacity problem can be applied to calculate the heat capacity, mass, or temperature difference of any given substance.Heat Capacity is described in Joule per Kelvin (J/K).So, Option C is the answer.
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Aristotle believed which of the following to be true?
1. Gravity is as important as religion.
2. earth is the center of the universe.
3. Everything can be scientifically explained.
4. The jet stream is why bodies fall differently.
Answer:
number 2
Explanation:
A burner on a stove produces which type of energy
Answer:
Thermal energy
Explanation:
A burner on a stove produces thermal energy
Answer:
Thermal energy
Explanation:
A burner on a stove produces thermal energy.
Hope this helps!
Feel free to ask if you have anymore questions!
Select all that apply
What are some basic resources a family is expected to provide for children?
education
clothes
spending money
food
shelter
vacations
Answer:
education
clothes
food
shelter
Explanation:
Answer:
1. education
2. clothes
3. food
4. shelter
Explanation:
The correct answers are basic needs that children should be provided. However, spending money and vacations are just privileges, not mandatory.
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Which of the following are forms of phase changes
A. freezing
B. condensation
C. heating
D. exchanging
Answer:
I think it would be exchanging sorry if it's wrong
how much hereditary information is contain in a human sex cell
Answer:
one-half the amount
Explanation:
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what is the distance moved by a particle moving along x axis if it starts from x=-7m goes upto x= -12m turns and stops at x=+34m? also calculate the net displacement
Answer: Trajectory=51m
Displacement=41m
Explanation:
Let's begin by stating clear that movement is the change of position of a body at a certain time. So, during this movement, the body will have a trajectory and a displacement, being both different:
The trajectory is the path followed by the body (is a scalar magnitude).
The displacement is the distance in a straight line between the initial and final position (is a vector magnitude).
According to this, in the description of the object placed at x= -7m on a number line and moving some 12m to the left and then to the right, stopping at x=34m; we are talking about the path followed by the object, hence its trajectory. So, 51 m is its trajectory.
But, if we talk about displacement, we have to draw a straight line between the initial position of the object (x=-7m) to its final position (x=+34m).
Now, being this an unidimensional problem, the displacement vector for this object is 41m.
A 26 cm object is 18 cm in front of a plane mirror. A ray of light strikes the object and is reflected off the mirror at a 42-degree angle. What is the angle of reflection? degrees What type of image is formed? What is the size of the image? cm
Answer:
42 degrees, virtual image, same size as the object (26 cm)
Explanation:
The law of reflection states that:
- When a ray of light is incident on a flat surface (such as the plane mirror), the angle of reflection is equal to the angle of incidence
So, since in this case the angle of incidence is 42 degrees, the angle of reflection is also 42 degrees.
Moreover, the image formed by a plane mirror is always:
- Virtual (on the same side as the object)
- The same size as the object
So in this case, since the object's size is 26 cm, the image's size is also 26 cm.
42 degrees
virtual
26 cm
If a toy has a mass of 1 kg, it has an Earth weight of
Answer:
The answer is 9.8 N
Explanation:
As we know that the weight of an object is the amount of gravitational force acting on the object in an upward direction if the weight is acting is the downward direction.
The formula of weight:
W = Mass x Gravitational force
W = m x g
Given data:
Mass =1 kg
g = 9.8 ms-2
W = 1kg x 9.8 ms-2 = 9.8 kgms-2 ( 1 kgms-2 = N)
SO,
W = 9.8 N
The toy has an earth weight of 9.8 N.
Why are “input” and “output” good words to use when discussing systems?
Answer:
To determine how efficient that system is.
Answer:
Because it gives a direct relation that can be used to obtain the efficiency E = Input/output which tell us how the system works, for example, if the efficiency is bigger than one, this means that the system amplifies the input (the output is bigger than the input) while if the efficiency is less than one, the output is smaller than the input.
Where these quantities can be forces, heat, electricity, or anything.
A screw incorporates which other simple machine?
lever
wheel and axle
inclined plane
pulley
Answer:
Inclined plane.
Explanation:
Geometrically, a screw is a narrow inclined plane that is wrapped around a cylinder. Like the other simple machines a screw can amplify force; a small rotational force (torque) on the shaft can exert a large axial force on a load.
A screw is a cylinder with a head (solid top) at one end and a pointed tip (like a nail) at the other end.
The mechanical advantage of the screw depends on the space between the threads and the length (and thickness) of the screw. The closer the threads are, the greater the mechanical advantage. It is easier to drive a screw into an object if the thread spacing is smaller.
Answer:
Inclined Plane
Explanation:
A screw incorporates which other simple machine?
lever
wheel and axle
inclined plane
pulley
what is the position of the earth when the sun rises to its lowest midday position in the sky in the northern hemisphere and the southern hemisphere?
Final answer:
The Earth's position when the Sun reaches its lowest midday position in the sky is during the winter solstice. In the northern hemisphere, this occurs on December 21 or 22, and in the southern hemisphere, it occurs on June 20 or 21, both being the result of the tilt of Earth's axis.
Explanation:
The position of the Earth when the Sun rises to its lowest midday position in the sky in the northern hemisphere occurs during the winter solstice, which takes place on December 21st or 22nd. At this time, the Earth's axis of rotation is tilted away from the Sun, resulting in the Sun rising the most south of east, setting the most south of west, and taking its lowest and shortest path across the sky. This results in the shortest day and the longest night of the year for the northern hemisphere.
In contrast, for the southern hemisphere, the situation is reversed. The lowest midday position of the Sun occurs around June 20th or 21st, during their winter solstice. In this case, the Earth's axis is tilted such that the southern hemisphere is pointed away from the Sun, and thus the Sun takes a low arc across the sky, resulting in short days and long nights for that hemisphere.
An object at rest requires a force of 15 Newtons to set it into motion
Answer:
The force that required an object to move is greater than friction force. The opposite force for an object in motion is the friction force (assuming that the surface where the object lies is rough as most real objects are). This force is needed to be overcome to set the object to motion.
Explanation:
Karen is running forward at a speed of 9 m/s. She tosses her sweaty headband backward at a speed of 20 m/s.
The speed of the headband, to the nearest whole number relative to a stationary observer watching Karen
Answer:
The speed of the headband, to the nearest whole number relative to a stationary observer watching Karen, is 11m/s
Explanation:
The velocity of the headband relative to the stationary observer is equal to the velocity of Karen relative to the stationary observer plus the velocity of the headband relative to Karen. Mathematically:
[tex]V_{H} =V_{K}+V_{H/K}[/tex]
Where:
[tex]V_{K}=9m/s [/tex]
[tex]V_{HK}=-20m/s [/tex] (it's negative because it mover backward)
[tex]V_{H} [/tex]: velocity of the headband relative to the stationary observer
Plugging these values
[tex]V_{H} =9m/s-20m/s=-11m/s[/tex]
Speed is simply the magnitude of velocity or its absolute value, that is to say, 11m/s (positive)
wich factors affect the electrical force between two objects?
Answer:
The strength of the charge and the distance between the two bodies.
Explanation:
According to coulombs law, electrical force is calculated as follows:
F = k (Q1 ×Q2)/ d²
where Q1 and Q2 represents the amount of charge between the two bodies while d is the distance between then.
This means the electrical force is directly proportional to the electrical charge of the bodies and inversely proportional to the square of the distance between them.
Bodies with high amounts charges will have stronger electrical forces between them than bodies with less electrical charges.
Charged bodies near each other will have stronger electrical forces between them than bodies far apart.
A boat is headed with a velocity of 18 meters/second toward the west with respect to the water in a river. If the river is flowing with a velocity of 2.5
meters/second in the same direction as the boat. What would be the magnitude of the boat's velocity?
A.
16.5 meters/second
B.
20.5 meters/second
c.
18 meters/second
D.
2 meters/second
E.
45 meters/second
Answer:
B
Explanation:
The boat's velocity relative to the earth = the boat's velocity relative to the river + the river's velocity relative to the earth
v = 18 m/s + 2.5 m/s
v = 20.5 m/s
whithin which type of system is neither the total mass nor the total energy conserved ?
a. open
b. connected
c. isolated
d. closed
Answer:
a. open.
Explanation:
Open System:
A system that has external interactions is called an open system. In natural sciences an open system is the one whose border is permeable to both energy and mass. In thermodynamics a closed system, by contrast, is permeable to energy but not to matter.
As there are external interactions, the open system might lose/gain energy as well as matter.
Answer:
closed
Explanation:
A 64-kg person riding on a roller coaster starts at rest and reaches a final speed of 26 m/s at the bottom of its first hill. What is the roller coasters height?
Answer:
34.5 m
Explanation:
According to the law of conservation of energy, the mechanical energy of the person at the top of the hill must be equal to the mechanical energy at the bottom. However:
- the mechanical energy at the top is just gravitational potential energy, since the person is at rest, so the kinetic energy is zero
- the mechanical energy at the bottom is just kinetic energy, since the height of the person has becomes zero
So, the initial gravitational potential energy of the person must be equal to the final kinetic energy of the person:
[tex]U=K[/tex]
[tex]mgh = \frac{1}{2}mv^2[/tex]
where
m = 64 kg is the mass of the person
g = 9.8 m/s^2 is the acceleration due to gravity
h is the initial height of the roller coaster
v = 26 m/s is the final speed
Solving for h,
[tex]h=\frac{v^2}{2g}=\frac{(26 m/s)^2}{2(9.8 m/s^2)}=34.5 m[/tex]
_____ are formed where bumps from two surfaces come into contact ?
Answer:
the answer would be microwelds.
GUESS WHAT?? I'LL MAKE YOU BRAINLIEST! PLEASE ANSWER THIS QUICKLY!
Which of the following characteristics do all of the outer planets have in common?
A) They have many moons.
B) They are small and solid.
C) They rotate slowly and are large and solid.
D) They rotate quickly and are large and gaseous.
Answer:
The correct answer is actually D) They rotate quickly and are large and gaseous.
Think about the features of the outer planets.
I got this question wrong because of the previous user that answered this.
here is proof that my answer is correct:
Two springs have different spring constants. How could you identify the spring with the greater spring constant value?
A.It will be shorter than the other.
B.It will be stiffer than the other.
C.It will be wider than the other.
D.It will have more mass than the other.
Answer:
B.It will be stiffer than the other. - I JUST DID THE QUIZ ON PLATO AND IT WAS CORRECT.
Explanation:
PLEASE ANSWER FIRST GETS BRAINLIEST
What happens if a magnet is moved back and forth inside a coil of wire
A. The magnet becomes electrified
B. The coil becomes magnetized
C. The magnet loses its magnetism
D. The coil gains an electrical current
Answer:
I think it's d. The coil gains an electical current
Explanation:
A group of organs that work together towards achieving one goal or completing one process is called a(n) ____________.
Answer:
Organ system
Explanation:
A group of organs that work together to perform a certain task
A group of organs that work together towards achieving one goal or completing one process is called an Organ system.
Explanation:
The organ system is the system which consists of the group of organ which has been assembled or grouped together to perform a particular course of action or simply say a task. There are many organ system in a human body.
For example, reproductive system, digestive system, excretory system. Here the reproductive system perform a particular task of reproduction, and so does the digestive system for the digestion and the excretory system for the excretion of waste.
How does the kinetic energy of a charge change as the charge moves under the effect of an electric field from higher potential to lower potential?
A.
The kinetic energy increases.
B.
The kinetic energy decreases.
C.
The kinetic energy remains the same.
D.
The kinetic energy is always zero.
Answer:The kinetic energy will decrease.
Explanation:As potential energy increases kinetic energy will increase, as kinetic or potential energy decreases, the kinetic or potential energy will decrease
Which lists the organs in the correct order as food passes from the mouth to anus?
Answer:
The digestive process:
Mouth
Esophagus
Stomach
Small intestine
Pancreas
Liver
Large intestine
Explanation:
The digestive system is made up of the GI tract or digestive tract—and the liver, pancreas, and gallbladder. The GI tract is a series of hollow organs joined in a long, twisting tube from the mouth to the anus. The hollow organs that make up the GI tract are the mouth, esophagus, stomach, small intestine, large intestine, and anus. The liver, pancreas, and gallbladder are the solid organs of the digestive system.
Final answer:
The correct order of the digestive organs as food passes from the mouth to the anus is mouth, esophagus, stomach, small intestine, large intestine, rectum, and anus. Accessory organs aid digestion but do not directly contact food.
Explanation:
The digestive system includes several major organs through which food travels from the mouth to the anus. To answer both review questions provided, here is the correct sequence of the digestive organs along the gastrointestinal tract, starting with the mouth:
MouthEsophagusStomachSmall IntestineLarge Intestine (also known as the colon)RectumAnusIn addition to these organs directly involved in the passage of food, there are accessory organs such as the salivary glands, pancreas, liver, and gallbladder that play crucial roles in digestion. These accessory organs assist in breaking down food through the secretion of enzymes and other digestive juices, but do not come into direct contact with the food within the GI tract.
It is possible a tree could fall down, even if no one did anything to it. A. True B. False
Answer: Yes
Explanation: To answer this, consider the natural processes that can cause a tree to fall, such as decay, disease, or adverse weather conditions. Trees can fall due to natural factors like rotting of the roots or trunk, strong winds, or heavy snow. Therefore, it is possible for a tree to fall down without any external force acting on it.
if 10 calories of energy are added to 2 grams of ice at -30°C, calculate the final temperature of the ice.
Answer:
= -20°C
Explanation:
The specific heat capacity of ice using the cgs system is 0.5cal/g°C
The enthalpy change is calculated as follows
ΔH=MC∅ where M represents mass C represents specific heat and ∅ represents the temperature change.
10cal = 2g×0.5cal/g°C×∅
∅=10cal/(2g×0.5cal/g°C)
∅=10°C
Final temperature= -30°C+ 10°C= -20°C
Answer:
-20 C
Explanation:
An object rolls off a tabletop with a horizontal velocity v0x = 2.2 m/s. The table is at a height y0 = 0.65 m, above the floor. Use a coordinate system with its origin on the floor directly beneath the point where the object rolls off the table, its horizontal x-axis lying directly beneath the object’s trajectory, and its vertical y-axis pointing up.
Find the angle of impact, in degrees below the horizontal.
To find the angle of impact in degrees below the horizontal, use the equations of motion to find the time of flight and horizontal distance the object covered when it rolled off the table, then apply those values to the equation for determining the angle of impact.
Explanation:The subject at work here is Physics, more specifically the domain of kinematics. The angle of impact, in degrees below the horizontal, can be found using the equations of motion.
First, we'll need to find the projectile's time of flight using the equation: t = sqrt((2*y0)/g), where y0 = 0.65 m is the height of the table and g = 9.81 m/s² is acceleration due to gravity. This will give you the time.
Next, we can determine the horizontal distance covered by the object using the equation x = v0x * t, where v0x = 2.2 m/s is the initial horizontal velocity.
Finally, we can find the angle of impact using the equation θ = arctan((v*t)/x), where v is the initial vertical velocity (which should be zero as the object rolls off horizontally), t is the time of flight, and x is the horizontal distance. We finally convert the calculated angle from radians to degrees to get the answer.
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Which statement best describes what energy transfer diagrams show?
Energy can change form, but the total amount of energy stays the same.
Every energy transformation results in a reduction of energy
Energy transformations result in fewer types of energy
Each type of energy can change into one other type of energy
Answer:
Energy can change form, but the total amount of energy stays the same.
Explanation:
Energy transformation diagrams shows the different forms of energy which are converted into different forms.
As we know by an example of potential energy to kinetic energy conservation when a block is compressed against the spring then initially total energy is in the form of elastic potential energy of the spring.
When block is released then total potential energy of the block is converted into the kinetic energy of the block.
So here we know that in energy transfer diagram shows the transformation of energy while total energy will always remains conserved.
so here correct answer would be
Energy can change form, but the total amount of energy stays the same.
Answer:
a
Explanation:
Energy can change form, but the total amount of energy stays the same.
A rock is dropped from rest. How fast is it going after it has been falling for 9.2 s?
90.2 m/s. A rock dropped from rest after it has falling for 9.2 seconds will have a velocity of 90.2m/s.
The bodies left in free fall increase their speed (downwards) by 9.8 m/s² every second. The acceleration of gravity is the same for all objects and is independent of the masses of these. In the free fall the air resistance is not taken into account.
v = g*t
v = (9.8m/s²)(9.2s) = 90.2 m/s