.infinite.
&
also
.virtual.
HELPPPPP!
which of the following is a human action that could lead to decreased amounts of greenhouse gases found in the atmosphere, such as carbon dioxide?
A ) Generating energy by burning coal
B ) Deforestation
C ) Driving automobiles
D ) Planting trees
A phonograph record 0.15 m in its radius rotates 18 times per 90 seconds what is the frequency?
Answer:
The frequency of the phonograph record is 0.2 Hz
Explanation:
The frequency of an object moving in uniform circular motion is the number of completed cycles the object makes in a specified time period
The given parameters of the phonograph record are;
The radius of the record = 0.15 m
The number of times the phonograph record rotates, n = 18 times
The time it takes the phonograph record to rotate the 18 times, t = 90 seconds
The frequency of the phonograph record, f = (The number of times the phonograph record rotates) ÷ (The time it takes the phonograph record to rotate the 18 times)
∴ The frequency of the phonograph record, f = n/t = 18/(90 s) = 0.2 Hz
The frequency of the phonograph record = 0.2 Hz.
Determine Average Speed.
Total distance = 800 mi
Total time = 10 hr
Explanation:
Average Speed.=Total distance/Total time=800/10=80m/hour
Please HELP ME If the motion of an object changes, what must be true about the forces acting on that object?
Answer:
If there is a net force acting on an object, the object will have an acceleration and the object's velocity will change. ... Newton's second law states that for a particular force, the acceleration of an object is proportional to the net force and inversely proportional to the mass of the object.
Explanation:
If the motion of an object changes, the net force on the object is greater than zero or the forces acting on the object is unbalanced.
According to Newton's second law of motion, the force applied to an object is directly proportional to the product of mass and acceleration of the object. The object will move in the direction of the applied force.
When the net force on an object is zero, the object will be remain at rest.
However, when the net force on object is greater than zero, the object will move in the direction of the greater force.
Thus, we can conclude that if the motion of an object changes, the net force on the object is greater than zero or the forces acting on the object is unbalanced.
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What is angle between the vectors 2i -3j +K
and 3i +2j
?
a. 90°
C. 60°
b. 0°
d. 120°
Answer:
the answer is B
Explanation:
edg 2020
Which has a larger acceleration, a car or a person running?
Answer:
A car
Explanation:
___________________ is the opposition to the flow of electric charge. (Resistance or Electric power)
Answer:
The answer is Resistance
Answer:
Resistance
Explanation:
it opposes the flow of energy
Which is not an Ultimate Frisbee rule?
If you are in a car that is being pulled down a 56 m path with a force of 12.5
N, what is the work being done?
Answer:
answer is 700 joules
Explanation:
work is equal to force into displacement
W=12.5*56
700 joules
you are on a walk moving at 3m/s forward what would happen i you stepped off onto the floor? what if you stepped onto another walkaway moving with the same velocity?
Answer:
1) The person ma tend to fall
2) The person will remain upright
Explanation:
1) According to Newton's first law of motion, an object will continue in its state of rest or maintain its uniform motion on a straight line unless acted on by a force
Therefore, when a person steps off onto the floor from a walkway moving at 3 m/s, the friction between the floor and the person's feet prevents the forward motion of the feet, however the person's upper body will tend to continue with the forward motion, and the person may tend to tilt and fall over
2) If the person steps onto another walkway moving with the same velocity, the initial velocity of all parts of the person's body is maintained, such that the person will continue in his uniform motion without experiencing any force and therefore, the person will remain upright
Why does matter increase in volume when it heats up?
Answer:All three states of matter (solid, liquid and gas) expand when heated. ... Heat causes the molecules to move faster, (heat energy is converted to kinetic energy ) which means that the volume of a gas increases more than the volume of a solid or liquid.
Explanation:well I tried lol she just copied and pasted faster than I could
If 20 N force does 400 J
of work to move an
object, how far does the
object move?
Answer:
20
Explanation:
W = F*d
400 = 20*d
d = 20
What type of reaction feels cold to the touch? A. Endothermic, because energy is being released into the surroundings B. Endothermic, because energy is being absorbed from the surroundings C. Exothermic, because energy is being released into the surroundings D. Exothermic, because energy is being absorbed from the surroundings
Answer:
D. Exothermic, because energy is being absorbed from the surroundings
Explanation:
This is true about the Exothemic reaction due to the fact that, the reaction occurs outside the body. During this reaction, the energy being absorbed from the surrounding environment will hit the body surface thereby creating the coldness due to the heat given out from the body being minimal.
Answer:
Endothermic, because energy is being absorbed from the surroundings.
Explanation:
. Si mi mejor amigo vive a 100 metros de mi casa (una cuadra aproximadamente) y sabe qué cuando pongo una canción determinada es porque me voy a poner a bailar ¿Cuándo escuchará más rápido la música mi amigo en un día que la temperatura este en 27°C o en 36°C?
Answer:
Nuestro mejor amigo escuchará la música más rápido a una temperatura de 36 ºC (309.15 K)
Explanation:
Supongase que el aire se comporta como un gas ideal y que experimenta un proceso adiabático, entonces la velocidad del sonido ([tex]v[/tex]), medida en metros por segundo, queda traducida en la siguiente fórmula:
[tex]v = \sqrt{\frac{\gamma \cdot R_{u}\cdot T}{M} }[/tex] (1)
Donde:
[tex]\gamma[/tex] - Coeficiente de dilatación térmica, sin unidad.
[tex]R_{u}[/tex] - Coeficiente universal de los gases ideales, medido en kilogramo-metros cuadrados por mol-Kelvin-segundo cuadrado.
[tex]T[/tex] - Temperatura, medida en Kelvin.
[tex]M[/tex] - Masa molar, medida en kilogramos por mol.
Como se puede ver, la velocidad del sonido es directamente proporcional a la raíz cuadrada de la temperatura. Por tanto, nuestro mejor amigo escuchará la música más rápido a una temperatura de 36 ºC (309.15 K)
what is a example of the doppler effect
Answer:
The change in pitch of a siren on an ambulance
Answer:
Explanation:
The drop in pitch of ambulance sirens as they pass by and the shift in red light are common examples of the Doppler Effect.
What is the kinetic energy of a 25kg object moving at a velocity of 2.5 m/s
Answer:
78j
Explanation:
78.125J to be exact
PLEASE ANSWER ASAP!
The formula for kinetic energy is KE = 1/2mv2. If you increase the velocity of an object by 1 m/s, describe the responding change in kinetic energy.
Answer:
A
Explanation:
I took the test on progress learning and got it right.
If we increase the velocity of an object by 1 meter per second, as a result the kinetic energy of the object will increase as velocity is directly proportional to the kinetic energy.
What is Kinetic energy?
The kinetic energy of an object is the energy which the object possesses due to its motion. Kinetic energy is defined as the work which is required be done to accelerate an object of a given mass from the state of rest to its stated velocity.
Kinetic energy is the energy possessed by an object due to its motion. Potential energy is the form of energy which is possessed by an object due to the position or state. Kinetic energy is directly proportional to the mass and velocity of the object. Therefore, if we increase the velocity of an object, then kinetic energy of the object will increase.
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Which of the following areas of the sun is where energy is transferred very slowly, sometimes taking up to 100,000 years, by electromagnetic radiation?
A. the radiation zone
B. the core
C. the convection zone
D. the solar flares
4. A car is accelerating at 40 m/s2, if the car is 400 kg how much force
must be supplied from the engine?*
ASNWER THIS OR ILL KIDNAPP YOUR DOG AND REVEAL YOUR SEARCH HISTORY!!
Name 3 different forces that act on objects on the Earth
Answer:
Applied Force.
Gravitational Force.
Normal Force.
Frictional Force.
Air Resistance Force.
Tension Force.
Spring Force.
Explanation:
:)
Which of the following has the most kinetic energy?
A. stretching a rubber band
B. a jet flying through the air
C. throwing a paper airplane
D. pitching a baseball
Which of the following is a valid unit of power?
Kg.m2/s
Kg.m2/ s3
J
Kg2.m2/ s3
Answer:
kg•m^2/s^3
Explanation:
Here, we want to get the valid unit for power
Mathematically, power is time rate of doing work
Work is the product of force and distance
Unit for force is;
kg•ms^-2
work is;
Kg•ms^-2 • s
= kg•m^2•s^-2
Divide through by the s for time;
we have ;
kg•m^2•s^-2/s
kg•m^2•s^-3
And that is;
kg•m^2/s^3
Cutting down the forest reduces the size of animal habitats, increases erosion, and results in an increase in the amount of carbon dioxide in the atmosphere. In order to stop the harmful effects of cutting down trees, humans can A. clean up litter along the sides of the road. B. clear away the tree trunks and leave the land bare. C. dig up the land and use it as a landfill. D. plant more trees where forests are cut down.
Answer: D. plant more trees where forests are cut down.
Explanation:
Deforestation has to do with the cutting down of trees. Cutting down the forest reduces the size of animal habitats, increases erosion, and results in an increase in the amount of carbon dioxide in the atmosphere.
Ok order to tackle the above, it is necessary that we should plant more trees where forests are cut down.
HELPP!! what is not true about mitosis??
A. The chromosomes in the daughter cells half the number from the parent cell.
B. The chromosomes in the daughter cells are the same number as the parents cell.
C. Each nuclei is identical to the parent nucleus.
D. The four main stages are prophase,metaphase,anaphase, and telophase.
Answer:
I think its A
Explanation:
Can someone pls help me. WILL MARK U BRAINLIEST!!!
The moon has a smaller mass than the Earth. If
you were to travel to the moon your weight would
A. Increase
B. Decrease
C. Stay the same
D. Vary with day and night
A force acting toward the center of a curved
or circular path is called
A. Balanced forces
B. Net force
C. Centripetal force
D. Gravity
If dropped from the same height, how would
each ball hit the ground?
Wood Plastic Metal
A. Metal first, then plastic, then wood
B. Wood first, then plastic, then metal
C. Plastic first, then metal, then wood
D. They will all hit at the same time
Answer:
Decrease
Explanation:
If you were on the Moon, which has significantly less mass than the Earth, your weight would: decrease
The point that seemed to be giving me a complicated time was being able to distinguish the difference and meaning of weight and mass and being able to apply that to a problem. I kept mixing up the definitions. For example in homework 3.1, one question asked:
If you were on the moon, which has significantly less mass than the earth, your mass would:
a. increase
b. decrease
c. stay the same
d. become zero
The definition of mass is the amount of matter in an object. The definition of weight is the amount or unit of force. For me, I just had to remember that when it asked about weight, it wasn’t referring how heavy an object is. After I was able to recognize that when it came to weight, questions became easier.
The final and correct answer was decreasing. The answer is because the Moon’s mass is less. This means the gravitational force is less on your body, therefore, your mass is going to be lighter
A force of 3kN acts on a car to make it accelerate by 1.5m/s/s. What is the mass of the car?
Answer:
2
Explanation:
To find force it's force = mass times acceleration so to find mass you would divide force by acceleration
ILL GIVE BRAINLIEST !!!!!!!!!!! Do some research, and look up the difference between the zinc-carbon battery described on the
previous page, and the alkaline battery (shown at the left), which is another common dry cell that we
use every day. What are the electrodes made of in the alkaline battery? The electrolyte? Does one type
have an advantage over the other?
Create a few paragraph essay describing your findings to your teacher.
Answer:
The alkaline battery gets its name because it has an alkaline electrolyte of potassium hydroxide instead of the acidic ammonium chloride or zinc chloride electrolyte of the zinc-carbon batteries. An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent, such as water. The dissolved electrolyte separates into cations and anions, which disperse uniformly through the solvent. Electrically, such a solution is neutral.Advantages. One of the advantages of alkaline batteries over other primary batteries and rechargeable batteries is that it has higher energy density. It has longer shelf life than batteries with chloride-type electrolyte. It could last to up to seven years unused, losing about five percent of its energy every year.
Explanation:
The attaction between magnets is a chemical property.
True
Or
False
Answer:
false its an attraction property
Answer:
True
The attraction is a chemical property.
The position of an object in simple harmonic motion is described by the following equation: y=(0.50 m)cos(pi/2)t. What is the amplitude of vibration?
A. 0.75 m
B. 0.25 m
C. 0.50 m
D. 1.0 m
Answer:
C. 0.50 m
Explanation:
mark me as brainliest
The amplitude of the vibration with the given equation, y = (0.50) cos (π/2 ×t) is 0.50 m. Thus, option C is correct.
What is Simple Harmonic Motion?Simple Harmonic motion is defined as the periodic motion of the body resulting from the dynamic equilibrium. It is defined as the motion in which the restoring force is directly proportional to the displacement of the body.
Simple Harmonic Motion is defined as the repetitive back-and-forth motion of the central displacement. The maximum displacement of one side is equal to the maximum displacement of the other side.
The simple harmonic motion. F ∝ -x or a ∝ -x, where F is force and a is the acceleration of the body, and x is the displacement. The maximum displacement of the body is called the amplitude of the motion.
The energy is purely kinetic at its mean positions whereas the energy is purely potential at its extreme ends. The harmonic motion is also called oscillatory motion.
From the given, SHM equation, y = A sin(ωt) where A is the amplitude of the wave and ω is the angular frequency of the wave. In the cosine function, y = A cos(ωt + Ф) where Ф is the phase change.
Thus, the amplitude of the vibration is 0.50 m. Hence, the correct option is C.
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