Answer:
Newton's first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.
Newton's second law states that the acceleration of an object is directly related to the net force and inversely related to its mass. Acceleration of an object depends on two things, force and mass.
Newton's third law states that if an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A. This law represents a certain symmetry in nature: forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself.
Explanation:
A turtle moves at an average speed of 0.2m/S towards the finish line that is 80m away from the starting line. A rabbit,racing with the turtle,leaves the starting line 5.4 minutes after the turtle. The speed of the rabbit is 3.6km/h. Which one of them wins the race? Justify
Answer:
5.6mls
Explanation:
which element has the highest atomic number,oxygen or aluminum
Answer:
Aluminum has the highest atomic number
I wanna give points so my question,
What is gravity?
Answer:
An invisible force that pulls objects toward each other. Earth's gravity is what keeps you on the ground and what makes things fall. ... Gravity also gets weaker with distance. So, the closer objects are to each other, the stronger their gravitational pull is. Earth's gravity comes from all its mass.
Explanation:
thx for the points :)
Answer:
gravity is the force that attracts a body toward the center of the earth or toward any other physical body having mass.
Explanation:
Can we have the Doppler effect with light waves? How?
Answer:
Besides sound and radio waves, the Doppler effect also affects the light emitted by other bodies in space. If a body in space is "blue shifted," its light waves are compacted and it is coming towards us. If it is "red shifted" the light waves are spread apart, and it is traveling away from us.
Explanation:
_____ is not a unit of pressure. *
A) armstrong
B) atmosphere
C) millimeter of mercury
D) Pascal
Answer:
A) Armstrong is not a unit of pressure. In fact, I don't think it's even a unit at all, an "Amstrong" is a unit of length, if that's what you meant.
Atmospheres, Millimeters of mercury, and Pascals are all units of pressure.
Let me know if this helps!
Find the energy of a 50kg object that is moving at 4m/s
AND THIS ONE PLEASE PLEASE PLEASE
Answer:
The answer is D
What is the molarity (concentration) of 25.2 grams of NaF dissolved in a total volume of 0.75 liters?
Answer: concentration c = 25.2 g /(41.99 g/mol × 0.75 l)
Explanation: M(NaF) = 41.99 g/mol and amount of substance n = m/M.
Concentration c = n/V
What is the molarity (concentration) of 25.2 grams of NaF dissolved in a total volume of 0.75 liters is 0.8 mol/liter.
What is Molarity ?
Molarity shows the concentration of solute in the given solution. It is defined as no. of moles of solute present in 1 liter of solution. It is denoted by M. its SI unit is mol/L.
Hence, molarity is given by,
Molarity = No. of moles of solute ÷ Volume of the solution in liters
Given,
mass of NaF = 25.2 g
Volume of the solution = 0.75 liters
Molarity = ?
Let's find No. of moles of the solute.
NaF has one Na and one F.
Molar mass of NaF is,
Na = 22.98*1 = 22.98
F = 18.99*1 = 18.99
Molar mass of NaF is 22.98+18.99= 41.97 g/mol
No. of moles of the solute is,
25.2g of NaF × (1÷41.97 ) mol/g = 0.6 mol.
Molarity of NaF is,
Molarity = No. of moles of solute ÷ Volume of the solution in liters
M = 0.6 mol ÷ 0.75 liters
M = 0.8 mol/liter
Hence molarity of NaF is 0.8 mol/liter.
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Potential difference is measured in which units?
volts
amps
currents
watts
Answer:
The correct answer is A volts on edge 2021
Explanation:
Atmospheric pressure on that day is 1.0 multiply 10 to the power of 5 Pa. calculate the total pressure at the bottom of the pond
Answer:
Water pressure P=ρgh (density X acceleration due to gravity X height of water)
P=1000X9.8x3=29,400 N/m2 or Pascal
But there is air pressure over water which also adds to the pressure at the bottom of the pool.
Therefore,Atmospheric pressure over the water=1.01 x 105 N/m2
So the total pressure on the bottom of the pool = 29,400+ 101000 Pa
= 130,400 Pa
Explanation:
A ball at the top of a 25 meter hill has a mass of 18 kg. How much potential 1 poin
energy does it have?
Calculate the energy absorbed when 13 kg of liquid water raises from 18°C to 100°C and then boils at 100°C.
Answer:
the energy absorbed is 4.477 x 10⁶ J
Explanation:
mass of the liquid, m = 13 kg
initial temperature of the liquid, t₁ = 18 ⁰C
final temperature of the liquid, t₂ = 100 ⁰C
specific heat capacity of water, c = 4,200 J/kg⁰C
The energy absorbed is calculated as;
H = mcΔt
H = mc(t₂ - t₁)
H = 13 x 4,200(100 - 18)
H = 4.477 x 10⁶ J
Therefore, the energy absorbed is 4.477 x 10⁶ J
What is the relationship between stream and drainage basin
Which statement best explains the difference between light waves traveling through a vacuum and light waves traveling through a medium?
Answer:
The statement which best explains the difference between the light waves travelling through a vaccuum and light waves travelling through a medium is -"When light waves travel through a vacuum, they travel faster than when they travel through a medium."
Explanation:
Light waves are faster in vacuum because The refractive index of vacuum is the lowest since there is no barrier in the way of light propagation in vacuum. Demonstrate that the maximum speed of light in vacuum.
In a vacuum, light flies at 186,283 mph. Light flies at 186,200 mph in the air, or 56 mph slower. In another medium, such as water, light travels at 139,712 mph, or around 3/4 of the speed of light in a vacuum.
LIGHT WAVES -: Light waves are a form of electromagnetic wave that includes both visible and invisible to the naked eye wavelengths on the electromagnetic spectrum. The average human eye can see light with wavelengths ranging from 390 to 700 nanometers, or nm.
Forms of light waves comprises of Radio waves , microwaves , infrared waves , visible light etc.
When light waves travel through a vaccume, they travel faster than when they travel through a medium
What is light wave?A light wave is an electromagnetic wave which travels through the vacuum of outer space. Light waves are produced by vibrating electric charges., An electromagnetic wave is a transverse wave which has both an electric and a magnetic component.
Light waves are faster in vaccum because the refractive index of vaccume is the lowest since there is no barrier in the maximum speed of light in vaccum.
In vaccum light travels at 186283 mph in air 186200 mph in other medium like water at 139712 mph.
Hence light waves travel through a vaccum, they travel faster than when they travel through a medium
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If a constant fotce of 490 newtons is applied to an object and it proceeds to accelerate in the opposjte direction at 9.8 meters per second, every second, what is its mass?
Answer:
50 kg
Explanation:
f=ma
Force = mass x acceleration
490 = 9.8 x m
m = 50 kg
THE ELECTROMAGNET SPECTRUM ONLY HAS WHICH SHAPE OF WAVE?
Answer: Transverse
Explanation: Transverse waves possess a vertical wave motion and a horizontal particle motion.
How much is the velocity of a body
when it travels 6oo meter in 5 minute ?
Answer:
velocity=2m/s
I hope it's helps you
Answer:
Its average speed, pretending that it traveled at a constant speed, is
v = s / t
= 600 m
5 x 60 s
= 2 m/s
Hope it help...
Havea great day
What is happening to the water molecules as it changes from ice to liquid water? *
They are losing energy, can’t move only vibrate
They are gaining energy, can move and slide past each other
They are moving at high speeds and are far from each other
They are gaining energy, moving slowly until they evaporate
Answer:
They are gaining energy, can move and slide past each other.
Explanation:
Because as ice melts, the molocules gain energy/heat which warm them up and are able to slide/move apart from each other.
5. A 10 kg ball is traveling at the same speed as a 1 kg ball. Compared to the 10 kg ball, the 1 kg ball has (2 points)
HELP HWLP HELPPP AHHH
Answer:
x) KE and GPE
y) Only GPE
z) Only KE
Explanation:
From the diagram, we have;
1) At point X, the gall is at an elevation higher than the thrower, therefore, the ) ball has (gravitational) potential energy, GPE, because it can fall to a lower level unassisted from the height it was thrown
And the ball is also in upward motion, with which it reaches the height 'Y', therefore, the ball has kinetic energy, KE, to move higher
2) At point 'Y' which is the maximum height, the ball no longer moves upwards and momentarily, the ball has no vertical motion, therefore, the ball has only energy due to height, which is the gravitational potential energy, GPE
3) At the point Z, at the instant just before the ball touches the ground, the elevation of the ball above the ground is small, while the velocity of the ball is close to maximum velocity, therefore, the ball has Only kinetic energy, KE
What does the root cand mean in the word candescent?
The candescent quality of the room was improved by the southern exposure.
Answer:
Glowing
Explanation:
pls help meeee!!! will mark brainliest!!
Answer:
water
is missing in above equation
hope it helps
Lisette decided to take this game more seriously and put both hands on the rope, applying a 150 N force to the left. Alexis still struggled with her 100 N force to the right.
Answer:
orce or acceleration b. Ms. Sunderland finally decided to take this seriously and put both hands on the rope and applied a 1000 N force to the left, while Jared and James still struggled with their 300 N force to the right. What is ... 150 more force. 10. During 5th period Dylan resisted the forces applied by her classmates in a ...
Explanation:
An object of mass 4.0 kg is dropped from a height of
1000 m from a helicopter. The air resistance acting
against the parachute exerts a steady upward force of 35 N. Calculate the kinetic energy of the object when it reaches the ground and hence find its velocity.
If 550 J of work is done to pull a box horizontally across the floor 4.6m, what is the force of friction between the box and floor?
The work done is the product of the force and resulted displacement. The frictional force between the box and floor is 119.5 N.
What is force?Force is external factor acting on a body to make a change in the state of an object . According to Newton's second law of motion, force is the product of mass and acceleration.
The work done in physics is the product of force acting on a body and its displacement. Therefore, the force which result in a displacement of the body is said to be work done on the object.
Here, the work done by frictional force is 550 J and displacement is 4.6 m.
Therefore, the force = work done / displacement
= 550 J/ 4.6 m
= 119.5 N.
Hence, the force between the floor and box will be 119.5 N.
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1) Un perito fue encomendado para determinar si un trozo de metal muy parecido al oro de 0,75 kg. Y de volumen 340 cm3. Era en verdad dicho metal, use las características de la densidad de un cuerpo para ayudar al perito.
Answer:
Primero, sabemos que la densidad de el oro es:
Densidad = 19.3 g/cm^3
Sabemos que nuestro metal tiene una masa de 0.75 kg, y un volumen de 340 cm^3.
Primero deberíamos reescribir la masa en gramos, pues la densidad está escrita en gramos.
Sabemos que:
1 kg = 1000g
Entonces:
0.75 kg es 0.75 veces 1000g, esto nos da:
0.75kg = 0.75*(1000g) = 750g
Entonces tenemos:
masa = 750g
volumen = 340cm^3
Ahora debemos recordar que:
densidad = masa/volumen
Entonces la densidad de este metal es:
densidad = 750g/340cm^3 = 2.21 g/cm^3
Si la comparamos con la densidad del oro, podemos ver que esta es mayor.
Entonces podemos concluir que este metal no es oro.
Which bar graph shows the reaction rates for a reversible reaction that has reached dynamic equilibrium?
Solve for x and y algebraically:
x + y = 8 and 3x + 2y = 21
Explanation:
ans ...(5,3)..............
Answer:
x = 5
y = 3
Explanation:
x + y = 8 and 3x + 2y = 21
Here We use Substitution Method
x + y = 8 ...(1)
3x + 2y = 21 ...(2)
From equation (1) we get
x + y = 8
x = 8 - y
Now the value of x = 8 - y in equation (2)
3(8 - y) + 2y = 21
24 - 3y + 2y = 21
- y = 21 - 24
y = 3
Then Put the value of y in equation (1)
x + (3) = 8
x + 3 = 8
x = 8 - 3
x = 5
Thus The value of x is 5 and y is 3
For Verification Only:x + y = 8
5 + 3 = 8
8 = 8
3x + 2y = 21
3(5) + 2(3) = 21
15 + 6 = 21
21 = 21
L.H.S = R.H.S
-TheUnknownScientist
what happens if one part of the body breaks down
Answer:
all the body parts work together to make your body function properly, so therefore, a lot of other body parts will break down
James went to the doctor for a check-up and found his weight to be 1,000 N. How much mass does James have?
Answer:
102.04kg
Explanation:
(1000kg*m/s^2)/(9.8 m/s^2)