Answer:
I would say the beaker with less water.
Explanation:
I was say this because while they are the same temperature the beaker with more water still has to fluctuate the heat or cold. They do this at the same speed but since there is less water in one beaker it finishes faster where as the beaker with more water will finish later.
A(n) _____ is an object that stops
electrons from completing the circuit.
How does the total mass before a nuclear reaction compare with the total mass after
a nuclear reaction? How does Einstein's equation address this difference?
Una reacción química, también llamada cambio químico o fenómeno químico, es todo proceso termodinámico en el cual dos o más especies químicas o sustancias (llamadas reactantes o reactivos), se transforman, cambiando su estructura molecular y sus enlaces, en otras sustancias llamadas productos.
Answer: A chemical reaction, also called chemical change or chemical phenomenon, is any thermodynamic process in which two or more chemical species or substances (called reactants or reactants), are transformed, changing their molecular structure and their bonds, into other substances called products.
Explanation:
Having some trouble with this one :/
An object has a kinetic energy of 50 J and a velocity of 5 m/s, what is the mass of the object?
Answer:
Mass, M = 4 kilograms.
Explanation:
Given the following data;
Kinetic energy = 50 J
Velocity = 5 m/s
To find the mass of the object;
Kinetic energy can be defined as an energy possessed by an object or body due to its motion.
Mathematically, kinetic energy is given by the formula;
[tex] K.E = \frac{1}{2}MV^{2}[/tex]
Where;
K.E represents kinetic energy measured in Joules.
M represents mass measured in kilograms.
V represents velocity measured in metres per seconds square.
Making mass the subject formula;
[tex] M = \frac{2K.E}{V^{2}}[/tex]
Substituting into the equation, we have;
[tex] M = \frac{2*50}{5^{2}}[/tex]
[tex] M = \frac{100}{25}[/tex]
Mass, M = 4 kg
The temperature inside a Carnot refrigerator placed in a kitchen at 22 degree Celcius is 2 degree Celcius. The heat extracted from the refrigerator is 89 MJ/h. What power is needed to operate this refrigerator?
Answer: 1.79 kW
Explanation:
Given
The temperature of the refrigerator is [tex]T_L=2^{\circ}C\approx 275\ K[/tex]
The temperature of the kitchen is [tex]T_H=22^{\circ}C[/tex]
COP of the refrigerator is
[tex]COP=\dfrac{T_L}{T_H-T_L}=\dfrac{\text{Desired effect}}{\text{Power}}\\\\\Rightarrow COP=\dfrac{275}{22-2}=\dfrac{89}{P}\\\\\Rightarrow P=\dfrac{20}{275}\times 89=6.47\ MJ/h\ \text{or}\ 1.79\ kW[/tex]
thuli wants to buy tv for R8500.a bank offers to loan her the money at an interest rate of 5%.she decides to pay the tv off in 3 years calculate the simple interest she will have to pay .also calculate the total she will pay
Answer:
The total she has to pay is R8500 plus the 5% interest.
PLEASE ADD BRAINEEST
If a 7 kg bowling ball is lifted 2 m into the air and dropped, what speed will it strike the ground? (
Answer:
6.32m/s
Explanation:
note:Now these calculations are based in the fact that acc. due to gravity is 10m/s²
okay so I'm thinking you think the speed of a body depends on the mass of the body also,umh... well it doesn't at all!
when two bodies of different masses fall from the same height,they fall at the same time( this is just to say)
now enough of the talking let solve....
so the ball was dropped .ie from rest to the ground through a distance of 2m,
the formula for calculating the distance if a body moving in a straight line is given by:
S=ut + ½at² where u is initial velocity, a is acceleration ( of the body or due to gravity, but since its falling freely under the influence of gravity its " we use the acceleration due to gravity ,which is 10m/s²) and t is the time taken to cover the distance.
from our question the ball was dropped from rest thus its u is 0 therefore we use this equation to find the time it took to touch ground (S=½at²)
solving ....
we get t to be 0.632s
to find the speed we substitute t in the equation below:
V=u+at ,but since u=0
V=at =10•0.632=6.32m/s
therefore the speed the body uses to strike the ground is 6.32m/s
In a thunderstorm at 32.0°C, Reginald sees a bolt of lightning and hears the thunderclap 2.00s later. How far from Reginald did the lightning strike? The speed of sound through air at 32.0° C is 350.2 m/s.
Answer:
dont have the answer but you cute
Explanation:
What role does the sun play in driving the water cycle in Antarctica
Answer:
the inner regions of antarctica gets only about 2 inches of precipitation per year. the winds here blow up snow from the land and put it into the atmosphere, which is part of the water cycle. and the sun helps out, too, causing sublimation to occur, which causes snow to evaporate directly into water vapor gas.
Explanation:
good luck, hope this helps :)
have a nice day !!
Match the following moves to the correct total distance and displacement of the moves.
A) Move 12 m west and then 8 m east
B) Move 9 m west and then 16 m east
C) Move 10 m east and then 12 m west
D) Move 5 m east and then 12 m east
1) Displacement is 17 m
east; distance is 17 m
2) Displacement is 2 m west; distance is 22 m
3) Displacement is 7 m east; distance is 25 m
4) Displacement is 4 m west; distance is 20 m
Answer:
A=4
B=3
c=2
D=1
Explanation:
since the person moving in opposite direction so displacement =distance in east/west - distance in west/east
After being pushed and released, a 50 kg crate slides across a factory floor. Friction on the sliding crate is 200 N, what is the crates acceleration ?
What is the most likely evidence of an energy transformation taking place when a wire that is twisted and turned breaks? (5 points)
Reddish glow is emitted as kinetic energy is transformed into thermal energy
Reddish glow is emitted as kinetic energy is transformed into electrical energy
Broken end of the wire turns hot as kinetic energy is transformed into thermal energy
Broken end of the wire turns hot as kinetic energy is transformed into electrical energy
Answer:
C
Explanation:
which type of thermometer is used to measure the temperature of a very hot object and why?
Answer:
Pyrometer, device for measuring relatively high temperatures, such as are encountered in furnaces. Most pyrometers work by measuring radiation from the body whose temperature is to be measured. Radiation devices have the advantage of not having to touch the material being measured.
Explanation:
06
In which diagram is the moment of the force the largest?
©
300 N
300N
300 N
lo
16 cm
A
B
16 cm
A: A
B: B
113
C: C
D: They are all the same
D
Explanation:
The are the same but difference
What is the
power of a light
bulb with 8V and
a current of 2A?
Answer:
16 Watts
Explanation:
P = VI, where V is the voltage and I is the current (of the lightbulb)
V = 8 volts, I = 2 amps
P = 8 * 2 = 16 Watts
A glass of milk at 50 °C was kept in the open. After 10 minutes, the milk became cooler. Which statement is correct?
The temperature of the surrounding air was less than 50 °C.
The temperature of the surrounding air was greater than 50 °C.
The final temperature of the milk was less than the final temperature of the surrounding air.
The final temperature of the milk was greater than the final temperature of the surrounding air.
Answer:
The temperature of the surrounding air was less than 50c
Explanation:
Answer:
A: The temperature of the surrounding air was less than 50 °C.
Explanation:
This is correct, i took the test and got it right. <3
Part D The surface area of a material is a factor that affects heat conductivity. Does heat flow faster through a large surface area or through a small surface area? Why? (Hint: Think about the number of particles available to bump into one another)
Answer:
That guy is right i got a 100 as my score :)
Explanation:
Why do Tectonic Plates move?
A) convection currents in the atmosphere
B) convection currents in the crust
C) convection currents in the asthenosphere
D) Convection currents in the core
Answer:
c. convection currents in the asthenosphere
Explanation:
A car traveled 210 km in 1.5 hrs, what was the car's average speed?
Answer:
140km/h
Explanation:
Average speed= Distance/Time
= 210/1.5
= 140 I'm/h
Click on the graphic below until the correct answer appears.
Which applies to a real machine?
Answer:
there is no graphic
Explanation:
An old woman is worried about time. She walks at a rate of 2 meters per second and travels a
distance of 454 meters. How long does it take her to complete the motion?
Please help ASAP!! BRAINLIST please explain thankyou!!!
Answer:
227 seconds.
Explanation:
Speed is equal to distance divided by time. s = d/t
We can rearrange this algebraically to solve for the time it will take to cover a certain distance at a certain speed. Time is equal to distance divided by speed. t = d/s
Then we substiture our known values for the variables and solve for our unknown.
t = 454m / 2m/s = 227s
Answer:
If the lady is traveling 2 meters per second and she travels 454 meters then you will have to divide 454 by 2 to get the amount of time she walked.
454 divided by 2 = 227
This means that the lady traveled for 227 seconds or about 3.78 minutes.
What is the mass of a child in a wagon that has a velocity of 10 m/s and a Momentum of 30 KG* M/S
P=MXV
Explanation:
sinces : Momentum = velocity × mass
then : 30 = 10 × m and m = 30 ÷ 10 = 3 kg
If you use a lever to lift a boulder 0.25m, while applying 350 N on the lever which moves 1.5 m down on your side. What is the weight of the boulder? (F1d1 = F2d2) 87.5 N 131 N 525 N 2100 N
Answer:
2100 N
Explanation:
From the question,
Using the formula
F₁d₁ = F₂d₂..................... Equation 1
Where F₁ = Weight of the Boulder, d₁ = distance moved by the Boulder, F₂ = Force applied on the lever, d₂ = distance moved by the lever.
make F₁ the subject of the equation
F₁ = F₂d₂/d₁.................... Equation 2
Given: F₂ = 350 N, d₁ = 0.25 m, d₂ = 1.5 m
Substitute these values into equation 2
F₁ = 350(1.5)/0.25
F₁ = 2100 N
write four importance of pressure
please help me
A football player kicks a football and exerts a force on the football of 0.4 kg (m/s²). The football’s acceleration is 0.92 m/s². What is the mass of the football?
Answer:
0.368 Newtons
Explanation:
Answer:
i think it's 0.88
Explanation:
Can sb help me frfr
True or False: You can break apart the atoms in a polyatomic ion.
True
False
what is the momentum of an object with 9.74 kg and 15 m/s?
Answer: 146.1 kg/m/s
Explanation: Momentum is equal to mass times velocity, so you do 9.74 kg times 15 m/s and get 146.1 kg/m/s.
What happens to the the eardrum, a thin membrane at the end of the ear canal, when it is struck by a sound wave?
a) It vibrates.
b) It closes.
c) It rotates.
d) It inverts.
4-08 t 1 - / S P = 1 / P = S 1 S= P Def. of Speed
Answer:
what do I answer? not enough information
When an object (like a ball) falls, some of its___ energy changes to ___ energy, due to the law of conservation of energy
Answer:
potential, kinetic
Explanation:
pls give brainliest :p