Answer:50m
Explanation:
A car accelerates from a velocity of 20 m/s in 5 seconds. What is the initial velocity of the car
Answer:
0
Explanation:
acceleration = velocity÷time
20/5=4m/s square
substitute it v= u+at
u will get final answer as 0m/s
How do you feel about the way land is used around you?
Answer:
I feel that people hurt the land and are destroying. I think they aren't using the land for the right reasons.
ecent communication with the inhabitants of Neptune has revealed that they have a Celsius-type temperature scale, but based on the melting point (0oN) and boiling point (100oN) of their most common substance, hydrogen. Further communications have revealed that the Neptunians know about perfect gas behavior and they find that, in the limit of zero pressure, the value of pV is 28 dm3atm at 0oN and 40 dm3atm at 100oN. What is the value of the absolute zero of temperature on their temperature scale
The absolute zero temperature is the smallest thermodynamic thermal limit, which is considered as a zero kelvin when the enthalpy, as well as the entropy of a cooled ideal gas, are of minimal value.
It is expressed by using the formula:
[tex]\mathbf{T_{abs} = T_N + k}[/tex]
where;
[tex]\mathbf{T_{abs } = absoulte \ temperature}[/tex]
[tex]\mathbf{T_N = temperature \ at \Neptune \ Scale}[/tex]
k = factor to convert temperature from absolute scale to Neptunian scale
N:B: An absolute temperature = zero (0) kelvin
From the information given, Using Ideal gas since it is used in Neptune:
PV = nRT
where;
P = pressureV = volumen = no of molesR = rate(constant)T = temperatureFrom the question, provided that the gas is the same and no new mass is added;
Then, we can equate the moles of gas in the given conditions as;
[tex]\mathbf{\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}....\dfrac{P_nV_n}{T_n}}[/tex]
Using:
[tex]\mathbf{\dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}}[/tex]
where the value of;
P₁V₁ = 28 dm³ atm
T₁ = 0⁰ N
P₂V₂ = 40dm³ atm
T₂ = 100⁰ N
∴
[tex]\mathbf{\dfrac{28}{(0+K)}=\dfrac{40}{(K+100)}}[/tex]
By cross multiply;
28(K+100) = 40(0+K)
28K + 2800 = 0 + 40K
40K - 28K = 2800
12 K = 2800
K = 2800/12
K = 233.33° N
Recall that:
[tex]\mathbf{T_{abs} = T_N + k}[/tex]
[tex]\mathbf{0= T_N+ 233.33 ^0 N}[/tex]
[tex]\mathbf{ T_N= - 233.33 ^0 N}[/tex]
Therefore, we can conclude that the value of the absolute zero of temperature on their temperature scale is -233.33° N
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ok seriously though
Gabriel accidently drops a glass on the kitchen floor, and it shatters. Which statements describe the physical change that has occurred? Check all that apply.
Answer:
the shape of the glass change and the size of the glass also change
Which velocity time graph represents the motion of an object moving with constant acceleration
Answer:
A
plss mark me brainliesttt
What happens if an object is in orbit and
the gravity increases?
A. The object will stop moving.
B. The object will fly off into space.
C. The object will smash into another object.
D. The object will float better.
Answer:
The object will float better.
Explanation:
If you have basic knowledge on how it works, this question is relatively easy. Let's start by reviewing something. We already know that this object (let's assume it's a spaceship of sorts) is in orbit, meaning there is already a certain amount of gravity from Earth tugging on it. We also know that space has an effect on how this moves, so the two forces "balance" each other, allowing the object to stay at orbit rather than just drifting off. Now let's see the answers to see which makes more sense.
A. The object will stop moving.
The object can't stop moving. With gravity increasing, it would be impossible for that to happen.
B. The object will fly off into space.
This could only happen if the gravity were to decrease by a decent amount.
C. The object will smash into another object.
There is no other object mentioned in the question.
D. The object will float better.
This seems most likely as gravity would be pulling on the object a bit more, but probably not enough to bring it back to the ground. It might drop a bit lower into the exosphere.
I hope I was right and I hope this helps!
Select the correct answer.
Which statement is true?
A.
Inertia causes bodies to slow in their motion, unless they’re pushed by a force.
B.
Inertia resists changes to the state of motion of a body.
C.
Inertia decelerates a body.
D.
Inertia is due to friction.
URGENT // PHYSICS
Match each measurement with the correct example.
distance
[ Choose ]
displacement
[ Choose ]
speed
[ Choose ]
velocity
[ Choose ]
acceleration due to gravity on Earth
[ Choose ]
net force
[ Choose ]
weight
[ Choose ]
acceleration
[ Choose ]
Choices :
75 m/s upwards ; 22 Newtons to the left ; 2 m/s^2 9.8 m/s^2 or 9.81 m/s^2 ; 128 m/s^2 West ; 14 meters ; 45 mph ; 125 kilometers South ; 14 newtons down
distance- 14 meters
displacement- 125 kilometers South
speed- 45 mph
velocity- 75 m/s upwards
acceleration due to gravity on the earth- 9.8 m/s^2
net force- 22 Newtons to the left
weight- 14 Newtons down
acceleration- 128 m/s^2 West
Velocity is the directional speed of a moving object as an indicator of its rate of change in location as perceived from a certain frame of reference and measured by a specific time standard.
What is Velocity?Velocity is the directional speed of a moving object as an indicator of its rate of change in location as perceived from a certain frame of reference and measured by a specific time standard.
Velocity → 75 m/s upwards
Velocity is the ratio of displacement and time, therefore, it has magnitude as well as direction.
Net force → 22 Newtons to the left
Force is measured in Newton and can be in any direction
Acceleration due to gravity on Earth → 9.8 m/s^2 or 9.81 m/s^2
It is the general value of Acceleration due to gravity on Earth.
Acceleration → 128 m/s^2 West
Acceleration is measured in meters per second square.
Distance → 14 meters
Distance is measured in meters, feet, cm, km, etc.
Speed → 45 mph
Speed is the ratio of distance and time.
Displacement → 125 kilometers South
Displacement has magnitude and direction both.
Weight → 14 newtons down
Weight is also a force but it is in the downward direction.
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Which of the following is not one of the primary colors of light?
O A. Green
B. Blue
C. Red
D. Yellow
SUBMIT
Right answer only if you don’t know it dont answer it please
PLS FAST WILL GIVE BRAINLIEST Examine the two isotopes.
oxygen-16
oxygen-17
In regards to subatomic particles, how are these two isotopes the same, and how are they different?
Answer:
both of those numbers have 8 protons
Explanation:
Is a dog chasing its tail acceleration
No. A dog chasing its tail is just an animal running around in circles.
The dog's MOTION, however, IS accelerated motion, since the DIRECTION of its motion is constantly changing.
A a dog chasing its tail cannot be considered as acceleration.
What is acceleration?Acceleration is the rate at which velocity changes over time, both in terms of speed and direction.
A point or object moving in a straight line is accelerated if it accelerates or decelerates. Even if the speed is constant, motion on a circle is accelerated because the direction is constantly changing.
For example, if a car accelerates as it turns a corner at constant speed, it is doing so because its direction is changing.
The faster you turn, the faster you accelerate. When velocity changes in magnitude (increase or decrease in speed), direction, or both, there is an acceleration.
Thus, as there is no change in either speed or direction in scenario in which a dog chases its tail, it is not considered as acceleration.
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Help 100 points ixl! Need it due in 10 minutes!
She travelled in one third of time=160km
Total distance=160×3=480km
Time=6h
[tex]\\ \bull\tt\dashrightarrow Velocity=\dfrac{Displacement}{Time}[/tex]
[tex]\\ \bull\tt\dashrightarrow Velocity=\dfrac{480}{6}[/tex]
[tex]\\ \bull\tt\dashrightarrow Velocity=80km/h[/tex]
Answer: 160km
Explanation:
What is the velocity of the objected represented by the graph between 14.0 s and 18.0 s?
240 m/s
- 15 m/s
- 120 m/s
120 m/s
Ms. Reitman's scooter starts from rest and accelerates at
2.0 m/s2. What is the scooter's velocity after 7 s?
Answer:
14 m/s
Explanation:
a = v/t
subbing in:
2 = v/7
v = 14 m/s
Define energy
define phisical quentity
Answer:
1.Energy is a quantity that is transferred from system to system. Energy is the ability of a system to do work. A system has done work if it has exerted a force on another system over some distance. When this happens, energy is transferred from one system to another.
2.physical quantity is a property of a material or system that can be quantified by measurement. A physical quantity can be expressed as a value, which is the algebraic multiplication of a numerical value and a unit. ... One is numerical magnitude and the other is the unit in which it is measured.
Someone give me the answer to this
Answer: A
Explanation: I looked it up on the internet
Answer:
the answer is A
Explanation:
protein helps build and repair tissues
Oketch's house has a septic tank with dimensions as shown below. 6m 2m 3m a) What is the capacity of the septic tank in; (1) m (ii) in litres cm3
[tex] \large \mathfrak{Solution : }[/tex]
Capicity of the septic tank is :
6m × 2m × 3m24 m³(i) capicity = 24 m³
(ii) capicity = 24 × 1000000 = 24000000 litres (cm³)
A car moves with constant speed and then constant acceleration
Which graph is the speed-time graph for the car?
Answer:
You have no graph on the post.
what is the density of 2liters of salt water that has the mass of 2.08kg
Answer:
Remember 1 litre is equivalent to 1 cm³
[tex]density = \frac{mass}{volume} \\ \\ density = \frac{(2.08 \times 1000) \: g}{2 \: cm {}^{3} } \\ \\ { \boxed{ \boxed{density = 1040 \: g {cm}^{ - 3} }}}[/tex]
or: density is 1.04 kg/l
A projectile is launched vertically with an initial velocity of 50 m/s. How long would it take to reach the top of the launch?
Answer:
Explanation:
Givens
vi = 50 m/s
vf = 0
a = - 9.81
t = ?
Formula
t = (vf - vi)/a
Solution
t = (0 - 50)/-9.81
t = 5.097
Notice that a is made into a minus. It does not mean subtract. It means that the direction of the projectile and gravity must go in opposite directions. You will find that direction is a critically important consideration in physics.
Answer:
It'd take it 5.10 seconds
Explanation:
At the top of the launch, it is maximum height, h
formular derivation :
At maximum height, final velocity, v is zero
From first newtons equation:
[tex]{ \sf{v = u + gt}}[/tex]
v is the final velocity
u is the initial velocity
g is acceleration due to gravity
t is the time taken
but v is zero:
[tex]0 = u + gt \\ gt = u \\ t = \frac{u}{g} [/tex]
since it is vertical motion, u = usin(theta), where angle is 90°
[tex]{ \boxed{t = \frac{u \sin( \theta) }{g} }}[/tex]
t is the time taken to reach the top of the launch:
substitute, taking g to be 9.8 m/s²
[tex]t = \frac{50 \times \sin(90 \degree) }{9.8} = \frac{50}{9.8} \\ \\ { \boxed{ \boxed{time = 5.10 \: seconds}}}[/tex]
What is "the cloud"?
Answer:
Cloud is a condensed from of atmospheric moisture consisting of small water droplets.
Clouds cause rainfall and snow fall.
Different types of clouds are found in the atmosphere. Some main types of them are cirrus, cumulus, nimbus, and stratus. Most clouds are generated by the cooling of air as it rises.
HEEEELP!!!!!HOW DOES SPEED TURN INTO A FORMULA.
what is non uniform motion?
Explanation:
When a body doesn't cover equal distance in equal interval of time then the body is said to be in non-uniform motion.how will this substance ease the pain?
Answer:
There are two main types of OTC pain medicines: acetaminophen (Tylenol) and nonsteroidal anti-inflammatory drugs (NSAIDs). Aspirin, naproxen (Aleve), and ibuprofen (Advil, Motrin) are examples of OTC NSAIDs. If OTC medicines don't relieve your pain, your doctor may prescribe something stronger
When dropped from rest, any object will fall a total distance of 19.6 m in the first 2 seconds of its fall. How far
does the object fall just during the 2nd second (i.e., from time t= 1 s to t = 2 s)?
Answer: The acceleration due to gravity increases the velocity of a falling object by 9.8 m/s per
second. Answer B is wrong because velocity increases. Answer C is wrong because the
distance increases every second. Ans. E is wrong because the derivative of distance with
respect to time gives the velocity, not the acceleration.
Explanation:
PLEASE HELP!!
Four second after starting from rest, what will be the velocity of an object in free fall?
The velocity of the object in free fall is 39.2 m/s.
Given the following data:
Initial velocity, U = 0 m/s (since the object is starting from rest).Time, t = 4 seconds.We know that acceleration due to gravity (a) for an object in free fall is equal to 9.8 meter per seconds square.
To find the final velocity (V) of the object, we would use the first equation of motion;
[tex]V = U + at\\\\V = 0 + 9.8(4)[/tex]
Final velocity, V = 39.2 m/s
Therefore, the velocity of the object in free fall is 39.2 m/s.
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partes son de un estadio de futbol
Las dos líneas más largas del terreno de juego se denominarán líneas de banda. Las dos más cortas se llamarán líneas de meta. El terreno de juego será rectangular y la longitud de las líneas de banda deberá ser mayor que las de las líneas de meta. La longitud de la línea de banda debe tener como mínimo 90 metros y como máximo 120 metros. La anchura de la línea de meta debe de tener como mínimo 45 metros y como máximo de 90 metros. Todas las líneas del terreno de juego deberán se líneas continuas y tener la misma anchura, como máximo 12 cm., menos las líneas de meta que deben tener la misma anchura que los postes y larguero de la portería. Todas las líneas que delimitan al campo forma parte del terreno de juego. El terreno de juego puede ser de tierra, césped natural ó césped artificial de color verde según las normas del reglamento de la competición. El terreno de juego está dividido en dos partes iguales por una línea que unirá los puntos medios de las dos líneas de banda. El centro del campo estará marcado con un punto situado en la mitad de la línea media que divide las dos partes iguales del campo, tomando este punto como centro, haremos circulo de un radio de 9,15 metros. También se puede poner un banderín en cada extremo de la línea de media, a una distancia mínima de 1 m al exterior de la línea de banda.
Kepler's Laws of Motion explain why ________.
Answer:
Kepler's three laws of planetary motion can be stated as follows: (1) All planets move about the Sun in elliptical orbits, having the Sun as one of the foci. ... (3) The squares of the sidereal periods (of revolution) of the planets are directly proportional to the cubes of their mean distances from the Sun.
Write about any 8 areas of field where physics is applied .Illustrate it with examples .
Explanation:
In construction.When constructing roads, buildingIn Engineering, when engineering we use physics such as calculations.At homeIn industries, industries use chemicals and so on.In tailoring, we use the knowledge of physics like when sowing.In carpentry, we use calculations.In Hospitals, we use physics we balancing In Sites, we use energy.Physics is a discipline that its applications cut across all fields. Ranging from banking, cooking, transportation, lecturing, medicine, engineering etc. It is the bed rock of engineering because all aspect of engineering involves the application of Physics.
Some of the fields where Physics is applied are:
a) Lecturing: This field requires the continuous dissemination of Physics knowledge to students from one level to another level.
b) Medicine: The various applications of physics in medicine can not be over-emphasized. This is because medicine involves the use of ultrasound, ionizing and non-ionizing radiation, magnetic resonance etc.
c) Electrical Engineering: In this field, the basic knowledge of Physics is applied to circuits, boards and electrical components.
d) Civil Engineering: The knowledge of stress, strain, shear, force, torque, weight etc are used in a lot of deductions.
e) Broadcasting station: This field make use of a lot of Physics principles so as to increase awareness and pass information. Thus the frequency of a broadcasting station determines her area coverage.
f) Transportation: As all vehicles consists of electrical devices, then the knowledge of Physics can bot be avoided.
g) Communication: Ranging from GPS, GPRS, Data transmission, voice call, email etc requires the knowledge and application of Physics.
h) Archaeology: Though not a related to Physics, but it requires the application of it. Radio-dating and carbon-dating are required to determine the age of some ancestral objects or artifacts.
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In Ohm's Law, it states that the current in the circuit is directionally proportional to the voltage in that circuit. Explain what you understand stand by this.
Answer:
Explanation:
Well mathematically it would look like this
E = k * I
k is the constant of proportionality.
As the voltage goes up, so does the current.
As the voltage goes down, so does the current.
In physics and engineering,, the formula is written somewhat differently.
E = I * R
The R is a device which limits the current. If R = 0 (like it is just a switch closing) then the first thing you will notice is that the lights go out and you better know where the circuit breakers are and have a flashlight to see which one you shorted out.
So R has a value > 0 in practice.
