Answer:
2. A push or pull
Explanation:
I'm 100% sure
Find the energy of a 50kg object that is moving at 4m/s
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:
In the following figure, a table of mass 0.44 Kg is pushed against an inclined surface with a 15 inclination angle. Find the amount of the horizontal component of the Weight
Answer:
W = 1.11 N
Explanation:
Given that,
Mass of a table, m = 0.44 kg
It is pushed against an inclined surface with a 15 inclination angle.
We need to find the amount of the horizontal component of the weight. The horizontal component of weight is given by :
[tex]W=mg\sin\theta\\\\W=0.44\times 9.8\times \sin(15)\\\\W=1.11\ N[/tex]
So, the amount of the horizontal component of the weight is 1.11 N.
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.
To find more on frictional force, refer here:
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What is the differece between force and motion?
Answer:
---
Explanation:
Force is like the amount of push
Motion is the result of Push
Which of the following is NOT a kind of energy store?
nuclear
kinetic
magnetic
temperature
Answer:
Option D is your answer ☺️☺️. If I'm right so,
Please mark me as brainliest. thanks!!!
Answer:
tempruter
Explanation:
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.
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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THE ELECTROMAGNET SPECTRUM ONLY HAS WHICH SHAPE OF WAVE?
Answer: Transverse
Explanation: Transverse waves possess a vertical wave motion and a horizontal particle motion.
A machine does 1200 J of work in 1 min. What is the power developed
by the machine? (Power = Work/time) in Watts OR Joules/second
Answer:
20 watts
Explanation:
Big brain mode activated:
Power=1200J/60sec
Power=20 watts
A plane has a mass of 2,000 kg and is traveling 100 meters above the ground. What is the plane’s potential energy?
I NEED THE ACTUAL ANSWER!
Answer: 1964000 Joules
Explanation:
PE = mgh
IIIIIIIIII neeeeeed helppppp again?
Answer:
The Principle of Progression
(I searched it up since I never learned this)
Explanation:
The principle of progression states that a person should start slowly and increase exercise gradually. Since Mandy is just getting started on her exercise routine, she should begin with a few workouts over a large span of time, then work her way up so she can do more workouts in a shorter span of time.
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.
Simple Question! Help!
If a bus takes 60 mins to go from
Dubai to Sharjah covering a distance of 60 km then what is the speed of the bus in km/h?
60km/hr..
I think so....
60 km/s
step-step wise explaination:60 kilometers / 60 minutes
= 1 kilometer / minute
as we know to convert kilometer / min we should multiply 60 to speed value
therefore, (1×60/ 1) km/hr=60 km/ hr
if you want to know why 60 multiplied with it then read this
1 km/min to km/hr
1 minute = 1/60 hour
so, for converting minute to hour we multiply 1/60
when it goes to top then it multiplied
I know it's little complicated let see it by equation
1 km/min = (1 / 1×1/60) km/h
=(1 / 1/60) km/hr
= 60 km/hr
( note there is no change in km so it remains without multiplied)
An object moving at 40 m/s takes 10 s to come to a stop. What is the object’s acceleration?
Answer:
-4 m/s^2
Explanation:
v=vo+at
0=40+a(10)
-40=a(10)
-4=a
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:
pls help meeee!!! will mark brainliest!!
Answer:
water
is missing in above equation
hope it helps
A person lifts a 25 kg box of old sports equipment at an angle of 75 degrees to the vertical to a shelf 2.6 meters above. How much work was done by the person?
Answer:
164.87 J
Explanation:
From the question,
Work done (W) = mghcosθ........................ Equation 1
Where m = mass of the box, h = height, g = acceleration due to gravity, θ = angle to the vertical
Given: m = 25 kg, h = 2.6 meters, θ = 75°.
Constant: g = 9.8 m/s²
Substitute these value into equation 1
W = 25×9.8×2.6×cos75°
W = 164.87 J.
Help !!
You are using sonar over a spot in the ocean known to be 91.8 m deep. The system emits a 50.0-kHz pulse into the water. It takes 120.0 ms for the sound to travel to the ocean floor and back to the sonar system. Determine the speed of sound in the ocean and the wavelength of the sonar pulse.
Answer:
a. Speed = 765 m/s
b. Wavelength = 0.0153 m
Explanation:
Given the following data;
Distance = 91.8m
Time = 120 milliseconds to seconds = 120/1000 = 0.12 seconds
Frequency = 50KHz = 50 * 10³ = 50000 Hz
a. To find the speed of sound in the ocean:
Speed = distance/time
Speed = 91.8/0.12
Speed = 765 m/s
b. To find the wavelength;
Wavelength = speed/frequency
Wavelength = 765/50000
Wavelength = 0.0153 m
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
Which bar graph shows the reaction rates for a reversible reaction that has reached dynamic equilibrium?
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?
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:
An insulator________the loss of heat energy.
A.)speeds up
B.)slows down
which one is it?
Answer:
A) speed up
is the correct option
Answer:
slows down
Explanation:
As the temperature difference decreases the rate of transfer slows (hope this helps)
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:
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
Potential difference is measured in which units?
volts
amps
currents
watts
Answer:
The correct answer is A volts on edge 2021
Explanation:
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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The speed of a wave in a medium is effected by____,____, and____
[tex]\huge\mathfrak\green{answer}[/tex]
As per as my knowledge
The speed of a wave in a medium is affected by density, wavelength and temperature :)
(Good luck on your test and mark me brainliest if this helps)
a wave has a period of 2.0 s. what is its frequency?
Answer: Frequency of 1 ÷ 2 = 0.5 Hz.