Answer:
HERTZ=HZ
Explanation:
In the context of variables and measurement scales, the magnitude of the differences between the numbers on the scale is meaningful in a(n) _____ scale.\
In the context of variables and measurement scales, the magnitude of the differences between the numbers on the scale is meaningful interval scale.
What is an interval scale?It should be noted that an interval scale means a measurement where the difference between the variables is meaningful and equal.
In this case, in the context of variables and measurement scales, the magnitude of the differences between the numbers on the scale is meaningful interval scale.
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1. Which of the following is the best description of combustion. Combustion is when you ___________________.
A. Use oxygen and a sugar to make energy and carbon dioxide.
B. Use oxygen to convert a fuel to heat and light energy.
C. Use carbon dioxide and light energy to make oxygen and heat energy.
D. Use carbon dioxide and a fuel to produce water vapor and energy.
Combustion is when you use oxygen to convert fuel to heat and light energy. Option B is correct.
What is combustion?Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives heat.
The fuel can be a solid, liquid, or gas.
For example, charcoal is combined with oxygen.
Combustion is commonly called burning, and the substance that burns is usually referred as fuel.
For combustion to occur few things must be present:
fuel to be burned.
A source of oxygen
A source of heat.
Hence, Combustion is when you use oxygen to convert fuel to heat and light energy. Option B is correct.
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What is the best reason for having a strong hypothesis?
O A. It can generate public interest in science.
OB. It can help answer a scientific question.
OC. It can help reinforce common knowledge.
D. It can make a business more profitable.
Answer:
the answer is C
Explanation:
i did this
Which is the most accurate description of how the coolant works in an engine?
Coolant absorbs thermal energy.
Combustion absorbs thermal energy.
Coolant absorbs chemical energy.
Combustion absorbs chemical energy.
Answer:
Coolant absorbs thermal energy
Explanation:
Since the coolant is used to refrigerate the engine, it have to absorb the thermal energy
If you push a 200 kg box with a horizontal force of 1,172 N and kinetic friction resists the motion with a force of 962 N, what is the resultant acceleration in m/s2
Answer:
a = 1.05m.s²
Explanation:
Fnet = m×a
Fapplied - friction = m×a
1172 - 962 = 200 × a
210 = 200a
a = 1.05
When a substance changes from a liquid to a solid, what happens to the
motion of its particles?
OA. They move more slowly and become fixed in position.
O B. They move more quickly and begin to move past one another.
C. They move at the same speed and in the same direction.
D. They move at the same speed but in random directions?
When a substance changes from a liquid to a solid, they move more slowly and become fixed in position. Option A is correct.
When a substance changes from a liquid to a solid, its particles lose energy and move more slowly. As the temperature decreases, the particles lose kinetic energy and start to arrange themselves into a fixed, ordered pattern. This causes the substance to solidify and the particles become fixed in position.
The transition from a liquid to a solid state is called freezing or solidification. During this process, the particles lose energy and their motion becomes more restricted, causing them to move more slowly and eventually become fixed in position. Option A is correct.
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1. kilogram
2. matter
3. meter
4. Sl system
standard unit of length in the SI
system
an international standardized
system of units used to communicate
scientific results
base unit for measuring mass in the
SI system
anything that has mass and
occupies space
Explanation:
1). Kilograms : base unit for measuring mass in the S.l system .2). Matter: Anything that has mass and occupies space.3). Meter: Standard unit of length in the Sl system.4). S.l system: system of units used to communicate scientific results.Hope this helps .
Good luck ✅.
how can you determine the relative ages of the moon's maria and highlands? (select all that apply.)
The relative ages of the moon's maria and highlands can be determined through the following:
Radioactive datingCrater densityLava flows.What is a Moon maria?This is referred to as the early geologic units of the moon which arose from asteroid impact and subsequent volcanic activity.
The ages can be measured using techniques such as radioactive dating and crater density.
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An astronomer wants to observe a cloud of dust in a relatively close part of the Galaxy. Unfortunately, this dust cloud is not located in the direction of a crowded region of stars. What instrument would be the most help in finding this cloud. Group of answer choices a visible-light telescope (like the Keck) with a camera or CCD detector a spectroscope that can search for the line radiation from highly ionized atoms an x-ray telescope in orbit around the Earth a sensitive infra-red telescope in orbit around the Earth
The instrument that would be the most help in finding this cloud is D. a sensitive infra-red telescope in orbit around the Earth.
What is an astronomer?It should be noted that an astronomer is a scientist who focuses on the study of the Earth.
In this case, the instrument that would be the most help in finding this cloud is a sensitive infra-red telescope in orbit around the Earth.
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The compass uses a pendulous system to improve?
The compass is designed and developed to use a pendulous system to improve horizontality.
What is a compass?A compass can be defined as a scientific instrument that contains a magnetized pointer, which is used to show and indicate the following four (4) main cardinal directions:
North (N)South (S)West (W)East (E)Basically, the compass is a scientific instrument that's designed and developed to use a pendulous system to improve horizontality.
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A 45. 5-g super ball traveling at 27. 5 m/s bounces off a brick wall and rebounds at 21. 0 m/s. A high-speed camera records this event. If the ball is in contact with the wall for 3. 30 ms, what is the magnitude of the average acceleration of the ball during this time interval?.
The magnitude of the average acceleration of the ball during this time interval will be 1969.69 m/s².
What is acceleration?The rate of velocity change concerning time is known as acceleration.
Given data;
Initial velocity, u= 27.5 m/s
Rebound velocity, v= 21.0 m/s
Time elapsed, t = 3.30 × 10⁻³ seconds.
To find ;
Average acceleration, a
The average acceleration when the change in velocity is observed by the formula as:
[tex]\rm a_{avg}= \frac{v-u}{t}[/tex]
Substitute the given values:
[tex]\rm a_{avg}= \frac{27.5-21.0}{3.30 \times 10^{-3}} \\\\ a_{avg}= 1969.69 \ m/s^2[/tex]
Hence, the magnitude of the average acceleration of the ball during this time interval will be 1969.69 m/s².
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Use the drop-down menus to complete the sentence.
A. object spins around its own axis, while a
object moves around another object.
Object spins around its own axis, while the object moves around another object.
What is Earth's revolution?
Earth's rotation or Earth's spin is the rotation of planet Earth around its own axis, as well as changes in the orientation of the rotation axis in space.
The continuous rotation of the Earth about its axis gives rise to the revolution of earth around the sun.
Thus, object spins around its own axis, while the object moves around another object.
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answer: rotating, revolving
any three methods to increase efficiency of a simple machine?
Answer:
lubricant (decrease friction).
control production speed.
use only when required.
A student hears a police siren. What would change the frequency that the student hears? check all that apply.
Considering the Doppler efect, the frequency heard by the student would change if:
if the student walked toward the police car.if the student walked away from the police car.if the police car moved toward the student.if the police car moved away from the student.Doppler effectThe Doppler effect is defined as the change in the apparent frequency of a wave produced by the relative motion of the source with respect to its observer. In other words, this effect is the change in the perceived frequency of any wave motion when the sender and receiver, or observer, move relative to each other.
In summary, there is always a change in the frequency of sound as the source of the sound moves towards or away from the observer. So, the Doppler Effect is an alteration of the observed frequency of a sound due to the movement of the source or the observer, that is, they are changes in the frequency and wavelength of a wave due to the relative movement between the wave source and the observer.
Changes on the frequencyIn this case, considering the Doppler effect, the frequency heard by the student would change if:
if the student walked toward the police car.if the student walked away from the police car.if the police car moved toward the student.if the police car moved away from the student.Learn more about Doppler effect:
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why would north america will not be able to view the eclipse
The North America will not be able to view the eclipse because of its location on the earth caused by the tilting of the earth.
Effect of tilting of the EarthThe tilt of the Earth is what causes seasons to occur. These are the seasons in relation to the Northern Hemisphere.
The tilting of the Earth causes the difference in the amount of sun reaching each region of the earth like in the North America continent.
Thus, the North America will not be able to view the eclipse because of its location on the earth caused by the tilting of the earth.
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What is the volume of the cone?
Answer:
42.417 cm³
Explanation:
The formula to find the volume of a cone is :
V = [tex]\frac{1}{3}[/tex] × π r² h
Here,
r ⇒ radius ⇒ 3 cm
h ⇒ height ⇒ 4.5 cm
Let us find it now.
V = [tex]\frac{1}{3}[/tex] × π r² h
V = [tex]\frac{1}{3}[/tex] × π × 3 × 3 × 4.5
V = [tex]\frac{1}{3}[/tex] × π × 9 × 4.5
V = [tex]\frac{1}{3}[/tex] × π × 9 × 4.5
V = [tex]\frac{1}{3}[/tex] × π × 40.5
V = [tex]\frac{1}{3}[/tex] × 3.142 × 40.5
V = [tex]\frac{1}{3}[/tex] × 127.251
V = 42.417 cm³
What is the purpose of the scapula to move during arm elevation?
The purpose of the scapula to move during arm elevation is increase the range of elevation of the arm.
What is the importance of movement of the scapula during arm elevation?The scapula is an important bone which is found in the shoulder and back region of the body.
The scapula enables and increases the range of motion of the arm with its motions.
During arm elevation, the scapula undergoes an upward rotational motion.
Therefore, the purpose of the scapula to move during arm elevation is increase the range of elevation of the arm.
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what is the total current for the parallel circuit?
Answer:
[tex]\huge\boxed{\sf Current = 6\ Ampere}[/tex]
Explanation:
In a parallel circuit, Total resistance is:
[tex]\displaystyle \frac{1}{R_T} =\frac{1}{R_1} +\frac{1}{R_2}[/tex]
Where [tex]R_1[/tex] = 6Ω and [tex]R_2[/tex] = 12Ω
Finding [tex]R_T\\[/tex]:[tex]\displaystyle \frac{1}{R_T} =\frac{1}{6} +\frac{1}{12} \\\\\frac{1}{R_T} =\frac{1 \times 2+1}{12} \\\\\frac{1}{R_T} =\frac{3}{12} \\\\\frac{R_T}{1} = \frac{12}{3} \\\\\boxed{R_T=4 \ Ohm}[/tex]
Finding current:We know that:
V = IR (Ohm's Law)V = 24 V, R = 4 Ω (V given, R found)
24 = I(4)
Divide 4 to both sides
6 A = I
Current = 6 Ampere
[tex]\rule[225]{225}{2}[/tex]
Henry shot a down tennis ball and a cricket ball of the same size to window glass. Which one will have more impact? Justify.
Answer: The cricket ball bc of the material
Explanation:
A length 550cm of thin thread wraps around a cylinder exactly 25 times calculate the circumference and the radius of the cylinder.
Answer:
3.5
Explanation:
hope it helps good day
Which charge has the strongest force acting on it?
11hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
Explanation:
Particles q1 = +8.0 uC, q2 = +3.5 uC, and
93 = -2.5 uC are in a line. Particles q1 and q2 are
separated by 0.10 m and particles q2 and q3 are
separated by 0.15 m. What is the net force on
particle q2?
Answer:
11.1845088571 N
Explanation:
F = k(q1q2)/(d^2)
What does that mean about the densities of the phases of water?
The solid state is the most dense, followed by the liquid state, then the gas state.
The solid state is more dense than the liquid state.
The liquid state is more dense than the solid state.
The gas state is the most dense, followed by the liquid state, then the solid state
The correct option is 2. The solid state is more dense than the liquid state.
The solid form of most substances is denser than the liquid phase so a block of most solids will sink in the liquid but a block of ice floats in liquid water because ice is less dense. Upon freezing the density of water decreases by about 9%. This is due to cooling of intermolecular vibrations allowing the molecules to form steady hydrogen bonds and locking into positions of hexagonal packing upon freezing to ice. These bonds are shorter in the crystal than in the liquid.
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Which marine habitats would have the least access to primary producers?
a.
salt marshes and estuaries
b.
coral reefs and lagoons
c.
mangroves and intertidal zones
d.
deep sea and sea floor
Please select the best answer from the choices provided
A
B
C
D
Answer:
D
Explanation:
Deep sea and sea floor marine habitats would have the least access to primary producers. The correct option is (d).
Primary producers would have the least access to habitats in the deep sea and on the ocean floor. Primary producers are animals and plants that can use sunlight as an energy source to photosynthesize and make their own food, including algae and phytoplankton.
Because of the depth of the water, light penetration is constrained in the deep sea and sea floor settings, making it difficult for creatures that rely on photosynthesis to survive.
In comparison to other maritime ecosystems, where sunlight is more easily obtainable, such as coral reefs, lagoons, salt marshes, estuaries, mangroves, and intertidal zones, these habitats often have lower amounts of primary production.
Therefore, The correct option is (d) deep sea and sea floor.
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Keisha writes that if an object has external force acting on it then the object can be in dynamic equilibrium but not staric equilibrium
The statement that best describes Keisha errors is an object in either state of equilibrium must have no net force acting on it.
What is an object at dynamic equilibrium?An object is said to be on a dynamic equilibrium when it moves at a constant speed, and all the forces on the object are balanced.
An object is also said to be on static equilibrium when it is unable to move because all the forces which act on it compensate for one another.
Therefore, the statement that best describes Keisha errors is an object in either state of equilibrium must have no net force acting on it.
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Can anyone please answer this cq..
A transverse wave that has electrical and magnetic properties is known as _________.
a. magnetism
b. loudness
c. electricity
d. electromagnetic energy
Answer:
D
Explanation:
the answer is D to me
the answer is D to me
Which equation can be used to calculate the normal force on an object if you know the speed of the object, the coefficient of kinetic friction, and the force of kinetic friction on the object?
Answer:
D
Explanation:
The friction force is the weight force times the coefficient of friction. So diving by the coefficient gives you the weight force which is equivalent to the normal force.
The equation that we can used to determine the frictional force using the coefficient of kinetic friction and the normal force is given by the expression : F = u N.
Where N is the normal force by the weight of the body.
What is frictional force?Frictional force is a type of force acting on a body to prevents its motion. Hence, the frictional force is always negative. Frictional force acting on an object is making a resistance to the motion of the object.
There are both kinetic frictional force and static frictional force. The coefficient of frictional force is the ratio of the frictional force to the normal force on the object. The normal force on the object is equal to m g that is the force by its own weight.
If u is the coefficient of kinetic friction and N be the normal force acting on the object, then the force of kinetic frictional force F is given by,
F = u N.
Where N = mg.
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what is projectile motion?Give 3 applications of it in our daily life.
Answer:
Motion of an object that travels in a curved path under the influence of Earth's gravitational field. Examples include throwing a ball, javelin throw, and golf ball.
Explanation:
Answer:
1. In sports.
2. In programming or Animation.
3. In home appliances.
4. In military.
Explanation:
1. In sports. Being common in sports, projectile motion is applied in motion of a projectile which is usually a ball. This is because we are able to calculate the angle of the flight developed by a ball to maximize its distance or velocity. For example in baseball and basketball.
2. In programming or Animation. Considering that there is a challenge for animators and programmers in modern world, physics is applied in televisions or video games. For example a baseball being hit by a player in video game or TV, it should look real. Hence the application of projectile motion.
3. In home appliances. Appliances for example hose or water gun uses an application of projectile motion. As the water exits the hose or water gun, the angle over which the water travels depends on the distance moved and force that is being applied.
4. In military. Bullets being shot from the barrel of the gun is a projectile in air. The speed of the bullet is higher than that of the water exiting the hose therefore it will travel a longer distance. The manufacturers of weapons such as a gun tries to maximize the speed while minimizing gun's recoil.
Even though it's not very popular these days, I like our system . Getting together to talk about who the best candidate might be makes me feel like we're really part of democracy. After the debate, we vote. In my state, any voter can participate. It's all pretty informal. What system for selecting party nominees does the passage describe? . Mixed primary B. Caucus C. Open primary . Closed primary
Answer:
I think it would be C: open primary
Explanation:
