Answer:
Light includes ALL of these answers: Radio/Microwaves. Visible light and X-rays/Gamma rays.
a driver's foot presses with a steady force of 20N on a pedal in a car as shown.
Answer:
160N
Explanation:
Moments must be conserved - so.
[tex]20 * 0.4 = F * 0.05[/tex]
[tex]F=\frac{20*0.4}{0.05} = 160[/tex]
A driver's foot presses with a steady force of 20 N on a pedal in a car, so the force F pulling on the piston is 160 N. Hence, option D is correct.
What is Force?A force in physics is an input that has the power to change an object's motion. A mass-containing object's velocity can vary, or accelerate, as a result of a force. Intuitively, a pushing or a pull can also be used to describe forces. Being such a vector quantity, a force does have magnitude and direction. The SI unit metric newton is used to measure it (N). The letter F stands for force.
According to Newton's second law's original formulation, an object's net force is equal to the speed that its momentum is changing over time.
From the given data in the question,
The momentum must be conserved,
20 × 0.4 = F × 0.05
F = (20 × 0.4)/0.05
F = 160 N
Therefore, the force is 160 N.
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In nature, hot air tends to rise and cool air tends to sink. This is behind the concept of convection heating that is used in ovens. Convection currents occur only in fluids such as liquids and gases but not in solids.
Which of the examples below is an example of convection?
A) rubbing your hands together.
B) heating a fish tank.
C) basking in the sun.
D) striking a match.
Answer:
BExplanation:
MODES OF HEAT TRANSFER
1) Conduction: This type of heat transfer happens when there is direct contact between the two object.
2) Convection: This type of heat transfer happens when there is a movement of fluid (liquid or gas).
3) Radiation: This type of heat transfer happens when there is direct transfer of energy through space.
A. Rubbing your hands together, is a type of energy transformation in which mechanical energy transforms to heat energy.
B. Heating a fish tank: Hot liquid tends to rise and cool liquid tends to sink and thus the fish tank heats.C. Basking in the sun: is a type of radiation as the sun energy is transferred through space.
D. Striking a match: is a energy transformation in which mechanical energy transforms to heat and light energy.
please make me brainlist
if the pH of a solution decrease's, is the solution getting more acidic or lees acidic
Answer:
The solution becomes more acidic.
Explanation:
As the pH of a solution decreases, the concentration of hydrogen ions [H+] increases. Acidic solutions have a higher concentration of hydrogen ions and a lower pH.
I hope this helped. :)
Question 1
Joseph is conducting an investigation on how two objects compare in mass, volume, and force with each other. When determining the
gravitational force between the two objects, which of the following characteristics of the objects should be considered?
Mass
Volume
State of matter
Shape
Joseph is conducting an investigation on how two objects compare in mass, volume, and force with each other. When determining the gravitational force between the two objects, the following characteristics of the objects should be considered :
MASS AND DISTANCE
Explanation:
The gravitational force is a force that attracts any two objects with mass. In fact, every object, including you, is pulling on every other object in the entire universe. This is called Newton's Universal Law of GravitationThe strength of the gravitational force between two objects depends on two factors, mass and distance. The force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled. increases, the force of gravity decreases.When two objects are gravitational locked, their gravitational force is centered in an area that is not at the center of either object, but at the barycenter of the system. The principle is similar to that of a see-saw.Gravity is often assumed to be the same everywhere on Earth, but it varies because the planet is not perfectly spherical or uniformly dense. In addition, gravity is weaker at the equator due to centrifugal forces produced by the planet's rotation.The gravitational force between two objects is determined by their masses and the force of gravity. The volume, state of matter, and shape of objects do not impact gravitational force, as it is the interaction of objects' masses that matter.
When determining the gravitational force between two objects, the characteristics of the objects that should be considered are their mass and the force of gravity that acts upon them. The volume, state of matter, and shape do not directly impact the gravitational force between objects. According to Newton's Law of Universal Gravitation, the force of attraction between two masses is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
Essential Knowledge in physics tells us that gravitational force describes the interaction of one object that has mass with another object that has mass. Therefore, it is the total quantity of matter—an object's mass—that influences the gravitational force. In contrast, the volume depends on the size of an object and its shape but does not affect gravity.
On Mars, how much would a 1kg object weigh
Answer:
Explanation:
On Mars, 1 kilogram would be about 3.5 Newtons. So, on Earth, the person would mass 77 kilograms, but weigh 754.6 Newtons. On Mars, the person would still mass 77 kilograms (because mass does not change with gravity), but weigh 269.5 Newtons.
Answer:
3.5 newtons
Explanation:
The weigh of the earths surface is 9.8 newtons so on mars it would be 3.5 newtons
Garrick rubs an inflated balloon against his hair. He then touches the balloon against a non-conducting wall.
Which picture shows how the charge on the balloon and the wall are distributed?
Answer:
Figure A
Explanation:
At first, the inflated balloon is rubbed against the hair.
In this situation, the balloon is charged by friction: because of the friction between the surface of the balllon and the hair, electrons are transferred from the hair to the surface of the balloon.
As a result, when the balloon is detached from the hair, it will have an excess of negative charge (due to the acquired electrons).
Then, the balloon is placed in contact with the non-conducting wall.
The non-conducting wall is initially neutral (equal number of positive and negative charges).
Because the wall is made of a non-conducting material (=isolant), the charges cannot move easily through it. Therefore, even though the charges on the wall feel a force due to the presence of the electrons in the balloon, they will not redistribute along the wall.
Therefore, the charges on the wall will remain equally distributed, as shown in figure A.
Which energy sources can transfer thermal energy to a heat pump? Check all that apply.
air
the ground
water
gas fuel
wood fuel
Answer:1.Air, 2.the ground,3.water
Explanation:I just got it right:)
Answer:
A, B, C OR 1, 2, 3
Explanation: i got it right
What areas in the United States are most like the grasslands of Kenya?
In United states, the grasslands are seen in the great plains, prairies, and in the intermountain west regions. They are mostly seen in Oklahoma, Kansas, Nebraska, South Dakota etc.
What are the main area of grass lands in united states ?The grasslands of Kenya are part of the East African savanna, which is characterized by warm temperatures, seasonal rainfall, and a mix of grasses and scattered trees. In the United States, similar grasslands are found in several regions, including:
The Great Plains: This region covers much of the central and western United States, and includes states such as Texas, Oklahoma, Kansas, Nebraska, South Dakota, and North Dakota. The Great Plains are characterized by a mix of grasses and scattered trees, and experience seasonal variations in rainfall.
The prairies: These are grasslands found in the central and western parts of the United States, including states such as Iowa, Illinois, Minnesota, Missouri, and Wisconsin. Like the Great Plains, the prairies are characterized by a mix of grasses and scattered trees.
The Intermountain West: This region covers parts of the western United States, including states such as Colorado, Wyoming, Montana, and Idaho. The Intermountain West is characterized by high-elevation grasslands and scrublands, which are adapted to the region's arid climate and rocky soils.
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The Great Plains in the United States are most similar to the grasslands of Kenya, as both are characterized as temperate grasslands dominated by grasses.
The areas in the United States that are most like the grasslands of Kenya, particularly the savannas of the Taita Hills Wildlife Sanctuary, are the Great Plains. The Great Plains region stretches across the central part of the US and is characterized by vast grasslands. This similarity is due to both regions being temperate grasslands, where the dominant vegetation is grasses and rainfall is moderate, creating an environment that does not support dense forests but does support a rich variety of grasses and herbaceous plants. The climate and ecology of the Great Plains share similarities with the Kenyan savannas, though there are also distinct differences in terms of specific flora and fauna due to geographical separation and varying climate conditions.
In your neighborhood, people are setting up a downhill soapbox derby race. As a safety measure, bales of hay are set up at the bottom of the hill as a barricade to stop cars and drivers. At what point on the car’s path will it have the most kinetic energy? A) at the very top of the hill B) at the midpoint of the hill C) at the very bottom of the hill D) after it collided with the hay
Answer:
The answer is C) at the very bottom of the hill because the top of a slope has the most potential energy and as it goes down it is converted to kinetic energy, so at the very bottom there is more kinetic energy.
Explanation:
Since potential energy is most concentrated at the peak of a slope and is transformed into kinetic energy as it descends, there is greater kinetic energy toward the bottom of the hill. Hence, option C is correct.
What is Kinetic energy?Kinetic energy is a type of power that a particle or an object possesses as a result of its motion. By exerting a net force on an item, work is done, which transfers energy; as a result, the object accelerates and obtains kinetic energy. A moving item or particle's ability to move depends on both its mass and velocity. This is known as kinetic energy. Translation (or movement along the path from one location to another), revolution about there being an axis, vibrations, or any combo of motions are examples of possible types of motion.
A body's squared translational kinetic energy, or 1/2mv², is equivalent to one the product of its mass, m, and its velocity, v.
Therefore, this concludes that option (C) is correct.
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Which value is equivalent to 7.2 kilograms?
A.
720 grams
B.
7,200 grams
C.
72,000 grams
D.
720 milligrams
E.
7,200 milligrams
Answer:
B 7200 grams
As
7.2 kg = 7.2 * 1000 gram = 7200 grams
The atomic number of an element is 22 while its mass number is 48. How many neutrons does the element have
Answer:
The answer is 26 neutrons
Explanation:
The element with an atomic number of 22 and a mass number of 48 has 26 neutrons. This is calculated by subtracting the atomic number from the mass number.
Explanation:The question asks how many neutrons does an element have, given that its atomic number is 22 and its mass number is 48. In chemistry, the atomic number represents the number of protons in an atom, in this case, 22. The mass number represents the sum of the number of protons and neutrons. Therefore, if you subtract the atomic number (protons) from the mass number (protons + neutrons), you will get the number of neutrons.
Mathematically, this can be represented as: Neutrons = Mass number - Atomic number. In this situation, the number of neutrons would be 48 (mass number) - 22 (atomic number), which equals 26 neutrons.
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(PLEASE HELP) Which of the following is the name for two or more types of atoms that are chemically bonded together?
A. Compound
B. Colloid
C. Element
D. Solvent
Answer: A
Explanation:
Answer:
A compounds
Explanation:
Which type of element seeks to gain electrons?
Answer:
Non-metals
Explanation:
when they form ionic compounds do so by gaining electrons. This due to the fact that they have high ionization energies and high electron affinities (referring to their ability to collect electrons). When they do form ions, they are of negative charge and are called anions.
The buoyant force on an object is dependent on _____.
a. the shape of the object
b. the volume of the object
c. the mass of the object
d. the object’s density
PLEASE ANSWER ASAP THANKS!!
Answer:
d. The objects density
Explanation:
Density is the measure of how much an an object will sink or float in liquid or gas. The density of the liquid or gas is also a factor in how much the object will sink or float.
Which of the following types of electromagnetic radiation has the longest wavelength?
Answer:
Radio waves have the longest wavelength, and gamma rays have the shortest wavelength.
Answer:
radio waves
Explanation:
How do scientists construct models of atoms and molecules?
Explain why no work has been done after Ethan pushes against a brick wall for 5 minutes that did not move.
A. The wall does not contain inertia.
B. Three or more people are needed in order for work to be done.
C. Two or more people are needed in order for work to be done.
D. In order for work to be done, the wall needs to move.
Answer:
D
Explanation:
I believe the answer is D, but I am not an expert.
Final answer:
No work has been done when Ethan pushes against a stationary wall because, in physics, work requires displacement (transfer of energy), which does not occur here. Therefore option D. In order for work to be done, the wall needs to move is the correct answer.
Explanation:
When Ethan pushes against a brick wall for 5 minutes and the wall does not move, no work has been done despite the feeling of effort. This is because, in physics, the concept of work requires that there be displacement of the object in the direction of the applied force. Since no displacement occurs in this scenario, there is no transfer of energy to the wall, and therefore, no work is performed according to the formula W = Fd (where W is work, F is the force applied, and d is the displacement). The correct answer to why no work has been done is D. In order for work to be done, the wall needs to move. It is crucial to note that this technical definition of work may differ from the everyday usage of the term, which often includes any exertion of effort.
Visit this website and locate the element chlorine, whose
chemical symbol is Cl. Click on the square to read about
the element.
Why is it important to use caution when handling
chlorine?
Answer:
Chlorine is a respiratory irritant. The gas irritates the mucus membranes and the liquid burns the skin. As little as 3.5 ppm can be detected as an odor, and 1000 ppm is likely to be fatal after a few deep breaths. In fact, chlorine was used as a war gas in 1915.
Explanation:
Chlorine, with the chemical symbol Cl, should be handled with caution because it can be harmful. Chlorine gas can cause respiratory problems if inhaled, while liquid chlorine can cause skin and eye burns. It can also react to form more hazardous substances.
Explanation:Chlorine, represented by the chemical symbol Cl, is an element often found in various compounds and used for a broad range of applications, including water treatment and disinfection in pools. However, it's important to handle chlorine with caution because it can be harmful to human health.
As a gas, chlorine is severely irritating and dangerous, causing issues with respiratory function if inhaled. Its liquid form can cause burns on the skin and eyes. Furthermore, chlorine can react with other chemicals, which might lead to the formation of substances more hazardous than the original chlorine.
This is why proper training, correct handling techniques, and safety measures should always be implemented when dealing with chlorine to minimize risks
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While escaping from a building in which a fire is burning, 40 people pass through a smoky
room in which the CO volume fraction
1000 uL/L, the HCN volume fraction
uL/L, and the C02, volume fraction is
0.02. Despite some visible smoke in the
they cross the room in about 10 seconds.
Calculate the fractional effective dose of
narcotic gases each person has accumulated
and estimate whether all of them will make
to the exit door.
my bad i clicked the wrong question to do sorry i wish i could help but im dumb lol
why must you use temperature to specify how hot or cold something is?
Temperature is crucial as it indicates the average kinetic energy of particles. Thermometers measure temperature using various material properties. Temperature scales allow for precise measurement of how hot objects are.
Temperature is a measure of how hot or cold an object is relative to another object. It is critical to specify how hot or cold something is because temperature indicates the average kinetic energy of the particles in matter, which directly affects various processes like chemical reactions.
Temperature is operationally defined to be what we measure with a thermometer. Thermometers rely on properties of materials like the expansion and contraction of liquid mercury or variation of resistance in wires to provide accurate temperature readings.
Using a temperature scale allows for quantitative measurement of how hot an object is, enabling us to understand changes in thermal energy content and the flow of heat between objects accurately.
What wave property is shown
Answer:
The answer is Refraction
Answer:
Refraction.
Explanation:
Refraction is where lighwaves are bent. your eye assumes that the object is where the light ray is coming from when it actually bent to come at your eye from that angle this is why straws appear slightly out of place in water.
2. What is the percent composition of sulfur in H2SO4?
CA. 98.1%
OB. 65.2%
O C.32.7%
D.2.1%
Answer:
C. 32.7%
Explanation:
% composition = ( mass S / mass H2SO4 ) × 100 = 32.08/ 98.10 × 100 = 32.7 % pls mark brainliest
Suppose that you are riding a bicycle. You exert an effort force of 697 N downward as you push on the pedals. The resulting load force that causes the bicycle to move forward is 93 N. What is the mechanical advantage of the bicycle? (Round to the tenths place)
The mechanical advantage of the bicycle is 0.1.
Explanation:
A simple machine is a machine that produces the output if we give the required input, and so the output always depends on the input force. Sometimes machines can also reduce the input force to get the required output and the ratio of output to input force is called as the mechanical advantage.
MA = [tex]$\frac{F_{o} }{F_{i} }[/tex]
Now we have the input force = 697 N
Output force = 93 N
So Mechanical advantage can be calculated by inserting those values as, MA = [tex]$\frac{93}{697}\\[/tex]
= 0.1
So the mechanical advantage of the bicycle is 0.1.
The mechanical advantage (MA) of the bicycle is calculated by dividing the load force by the effort force, resulting in an MA of 0.1 when rounded to the tenths place.
Explanation:To calculate the bicycle's mechanical advantage (MA), we use the ratio of the load force to the effort force. The formula for mechanical advantage is:
MA = Load Force / Effort Force
Given that the effort force exerted is 697 N, and the load force is 93 N, we plug these values into the formula:
MA = 93 N / 697 N
Calculating this gives us the mechanical advantage of the bicycle, which is:
MA = 0.1334
Rounded to the tenths place:
MA = 0.1
Match the following.
1. circuit with only one current path
parallel circuit
Watt's law
2. circuit with two or more branches
equation that relates electrical power, current, voltage, and
resistance
3. equation
series circuit
Answer:
A) The current in a parallel circuit and the voltage in a series circuit
Explanation:
Answer:
1. series circuit
2. parallel circuit
3. Watt's law
Explanation:
hope this helps someone!
Direct current is produced by
Answer:
A battery
Explanation:
Can trees be replenished by nature?
Answer:
yes
Explanation:
A personal career profile form evaluates two sets of data
Answer: It evaluates personal information and career information.
Explanation:
Answer:
A. personal information and career information
Explanation:
17. Which sound has the highest pitch? 156 Hz (hertz); 258 Hz (hertz); 14 dB (decibels): 563 dB
Answer:
258Hz
Explanation:
as 14 and 563 are measurings of decibels which are loudness. 156Hz is a lower pitch than 258Hz
The highest pitch among the given options is 258 Hz, as pitch is related to frequency. The higher the frequency, the higher the pitch. Decibels (dB) measure loudness, not pitch.
Explanation:The sound with the highest pitch among the options given, 156 Hz (hertz) and 258 Hz (hertz) is 258 Hz. Pitch is directly related to the frequency of the sound. The higher the frequency, the higher the pitch. Therefore, a sound wave with a frequency of 258 Hz is perceived as a higher pitch than one with a frequency of 156 Hz. However, the units dB (decibels) mentioned are units of loudness or intensity of the sound, not pitch, so they cannot be compared in terms of pitch.
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Which type of element seeks to gain electrons
Answer:
nonmetals
Explanation:
A compound composed of a metal and nonmetal is exposed to an electric current
attached to a light bulb. What do you expect should happen?
A.Light bulb turns on
B.Light bulb turns off
C.Light bulb flickers dimly
D.Light bulb gets colder
Answer:
A light bulb turns on
Explanation:
When a metal-nonmetal compound conducts electricity, the connected light bulb will turn on, indicating that the electric current is flowing through and the substance is an electrical conductor.
When a compound composed of a metal and nonmetal is exposed to an electric current and connected to a light bulb, the expected observation is that the light bulb will shine, indicating that the electric current is flowing through the compound. This implies that the substance being tested is an electrical conductor. Examples provided in the background information highlight that the flow of currents can lead to various results such as the warming of a wire in a circuit, which might lead to a continuous flow of electricity in the case of a thermocouple, or the attraction between warm and cold ends of a compound wire.
When a light bulb is connected in a circuit and current flows through it, the filament of the bulb heats up and emits light due to its resistance. In some cases, as with incandescent lights, this is not energy-efficient due to the heat produced. However, if the resistance in the circuit increases, we would expect the bulb to emit redder light, as the temperature of the filament would decrease, shifting the color spectrum towards the red end due to a decrease in energy emission.
Thus, for the choices provided, the answer would be A. Light bulb turns on, as long as the circuit remains closed and the substance allows for sufficient current to flow.