Answer:
62.7KJ
Explanation:
How many joules are required to heat 200 grams of water from 25˚C to 125˚C? 524.8 kJ
Start with Specific Heat because the water is not going through a phase change.
m= 200 g
Cp= 4.18 J/g˚C .......must be given
∆T= 100˚C - 25˚C = 75˚C
q =mCp∆T
q = (200g)(4.18 J/g˚C)(75˚C)
q = 62700 J = 62.7 kJ
How many miles did a plane travel if it flew 455 miles per hour in 3 hours? What formula did you have to use?
Answer:
1,365 miles
Explanation:
i multiplied 455 x 3 because it traveled 455 miles an hour for three hours.
If a spring constant of 128N/m is compressed by 0.18 m , how much potential energy is the spring?
Answer:
2.1J
Explanation:
Given parameters:
Spring constant = 128N/m
Compression = 0.18m
Unknown:
Potential energy of the spring = ?
Solution
The potential energy of the spring is the elastic potential energy within the spring.
To solve this;
Elastic potential energy = [tex]\frac{1}{2}[/tex] k e²
k is the spring constant
e is the compression
Now;
Elastic potential energy = [tex]\frac{1}{2}[/tex] x 128 x 0.18² = 2.1J
Tasha would like to work in a Securities and Protective Services job. Which qualifications would she need to succeed? O observational skills, critical thinking, and physical strength O knowledge of fire hazards, courage, and driving skills ability to challenge suspicious people, multi-tasking skills, and driving skills understanding of legal documents, integrity, and knowledge of laws
Answer:the answer is letter D
Explanation:
Any object or agent (biological, chemical, radiological, and/or physical) that has the potential to harm people, animals, or the environment is considered a hazardous material.
What are Hazardous material?This may be the result of the material's own properties or its interactions with other substances. The U.S. Environmental Protection Agency (EPA), the U.S. Occupational Safety and Health Administration (OSHA), the U.S. Department of Transportation (DOT), and the U.S.
Nuclear Regulatory Commission are primarily responsible for defining and enforcing laws and regulations related to hazardous materials (NRC). Each defines "hazardous substance" differently.
This includes chemicals such as carcinogens, irritants, corrosives, toxic agents, sensitizers, agents that damage the lungs, skin, eyes, or mucous membranes; chemicals that can combust, explode, are flammable, oxidizers, pyrophorics, unstable-reactive or water-reactive.
Therefore, Any object or agent (biological, chemical, radiological, and/or physical) that has the potential to harm people, animals, or the environment is considered a hazardous material.
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help in science pleas in physical science
Answer:
liquid
Explanation:
hope this helps
A rectangle box was measured with a length of 4cm, width 2cm, and height 2cm. What is the volume of the box?
Answer:
volume is 64
Explanation:
2×2×4×4
=64
Answer:
[tex]V = 16\ cm^3[/tex]
Explanation:
The Volume of a Rectangular Prism
A rectangular prism is also called a rectangular box and has three dimensions all perpendicular to each other.
Given a rectangular prism of length L, width W, and height H, the volume is calculated as:
V = WLH
We are given the dimensions of a rectangular box: L= 4 cm, W = 2 cm, H = 2 cm. Computing the volume:
V = 2 cm * 4 cm * 2 cm
[tex]\mathbf{V = 16\ cm^3}[/tex]
a person walks 60.0m and then walks 130m. what is the persons displacemnet if they walk east then west
Answer:
190
Explanation:
add because your looking for the Miles
When a person walks 60.0m and then walks 130m then the displacement of the person would be 70 meters if he first walked east and then west.
What is displacement?An object's position changes if it moves in relation to a reference frame, such as when a passenger moves to the back of an airplane or a professor moves to the right in relation to a whiteboard. Displacement describes this shift in location.
As given in the problem a person walks 60.0m and then walks 130m and if he first walks east then west then we have to find the displacement.
Displacement = final position -initial position
Lets us consider eastward as positive direction,
displacement = 60 - 130
= -70 meters
The negative sign represents the displacement would be in a westward direction.
Thus, If a guy initially went east and then west, his displacement would be 70 meters when he traveled 60.0 meters and then 130 meters.
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What does it mean when wave
crests are close together?
A. the higher the amplitude
B. the lower the amplitude
C. the shorter the wavelength
D. the longer the wavelength
Answer: C
Explanation:
Waves with a higher frequency have crests that are closer together, so higher frequency waves have shorter wavelengths.
A 300.0 g sample of water at 80.0°C is mixed with 300.0 g of water at
10.0°C. Assuming no heat loss to the surroundings, what is the final
temperature of the mixture? The specific heat capacity of liquid water is
4180 J/kg.°C *
Will give brainliest and lot of stars please help
Answer:
T_finalmix = 45 [°C].
Explanation:
In order to solve this problem, a thermal balance must be performed, where the heat is transferred from water with the highest temperature, to the water with the lowest temperature, so the final temperature of the mix must be equal once the thermal balance is achieved.
[tex]Q_{water}=Q_{methanol}[/tex]
where:
[tex]Q_{water}=m_{water}*Cp_{water}*(T_{waterinitial}-T_{final})[/tex]
mwater = mass of the water = 300 [g] = 0.3 [kg]
Cp_water = specific heat of the water = 4180 [J/kg*°C]
T_waterinitial = initial temperature of the water = 80 [°C]
T_finalmix = final temperature of the mix [°C]
[tex]Q_{water}=m_{water}*Cp_{water}*(T_{final}-T_{water})[/tex]
Now replacing:
[tex]0.3*4180*(80-T_{final})=0.3*4180*(T_{final}-10)\\100320-1254*T_{final}=1254*T_{final}-12540\\112860=2508*T_{final}\\T_{final}=45[C][/tex]
The final temperature of the mixture is 45 °C
Data obtained from the question Mass of warm water (Mᵥᵥ) = 300 g = 300 / 1000 = 0.3 KgInitial Temperature of warm water (Tᵥᵥ) = 80 °C Mass of cold water (M꜀) = 300 g = 300 / 1000 = 0.3 KgInitial Temperature of cold water (T꜀) = 10 °C Specific heat capacity of water (C) = 4180 J/KgºC Equilibrium temperature (Tₑ) =? How to determine the equilibrium temperatureHeat lost by warm water = Heat gained by cold water
Qᵥᵥ = Q꜀
MᵥᵥC(Tᵥᵥ – Tₑ) = M꜀C(Tₑ – T꜀)
0.3 × 4180 × (80 – Tₑ) = 0.3 × 4180 × (Tₑ – 10)
1254 (80 – Tₑ) = 1254(Tₑ – 10)
Clear bracket
100320 – 1254Tₑ = 1254Tₑ – 12540
Collect like terms
100320 + 12540 = 1254Tₑ + 1254Tₑ
112860 = 2508Tₑ
Divide both side by 2508
Tₑ = 112860 / 2508
Tₑ = 45 °C
Thus, the final temperature of the mixture is 45 °C
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Explain the difference between transverse and longitudinal waves.
A transverse wave is a wave in which particles of the medium move in a direction perpendicular to the direction that the wave moves. Suppose that a slinky is stretched out in a horizontal direction across the classroom and that a pulse is introduced into the slinky on the left end by vibrating the first coil up and down. Energy will begin to be transported through the slinky from left to right. As the energy is transported from left to right, the individual coils of the medium will be displaced upwards and downwards. In this case, the particles of the medium move perpendicular to the direction that the pulse moves. This type of wave is a transverse wave. Transverse waves are always characterized by particle motion being perpendicular to wave motion.
A longitudinal wave is a wave in which particles of the medium move in a direction parallel to the direction that the wave moves. Suppose that a slinky is stretched out in a horizontal direction across the classroom and that a pulse is introduced into the slinky on the left end by vibrating the first coil left and right. Energy will begin to be transported through the slinky from left to right. As the energy is transported from left to right, the individual coils of the medium will be displaced leftwards and rightwards. In this case, the particles of the medium move parallel to the direction that the pulse moves. This type of wave is a longitudinal wave. Longitudinal waves are always characterized by particle motion being parallel to wave motion.
The acceleration of an object would increase if there was an increase in:
A.mass of the object
B.force on the object
C.inertia of the object
D.friction in the object
Answer:
Its either B or A
Explanation:
Help!! ASAP plz
Determine the mass of the object below to the correct degree of precision.
358.3g
358.20g
358.30g
358.2g
I’m NC the wind is blowing from the north. If the wind changes direction and begins to blow from the south, what will most likely result.
NC means North Carolina.
Answer:
The temperatures will increase.
Explanation:
What will happen is that the temperature will increase. This is because, in wind direction and weather forecasting, a wind that shifts from the south means that warmer air/temperatures are approaching whereas a wind shift from the north implies that cooler air/temperatures are approaching.
At a baseball game, a pitcher throws the ball at 41.01 m/s to the catcher at home plate. If the mass of the baseball is 0.1299 kg, what impulse is required to provide the baseball with that much momentum?
Answer:
5.327 N-s
Explanation:
uwu
An airplane accelerates from a speed of 88m/s to a speed of 132 m/s during a 15 second time interval. How far did the airplane travel during the time interval?
Answer:
[tex]1650\:\mathrm{m}[/tex]
Explanation:
We can use the following kinematics equations to solve this problem:
[tex]v_f=v_i+at,\\{v_f}^2={v_i}^2+2a\Delta x[/tex].
Using the first one to solve for acceleration:
[tex]132=88+a(15),\\15a=44,\\a=\frac{44}{15}=2.9\bar{3}\:\mathrm{m/s^2}[/tex].
Now we can use the second equation to solve for the distance travelled by the airplane:
[tex]132^2=88^2+2\cdot2.9\bar{3}\cdot \Delta x,\\\Delta x= \frac{9680}{2\cdot2.9\bar{3}},\\\Delta x =\fbox{$ 1650\:\mathrm{m}$}[/tex](three significant figures).
Ask Questions Action and reaction force pairs are all around you, but they aren't always obvious. Write down
a question about a situation in which you can't identify what force pairs are at work.
Answer:
Writing with a pencil. The pencil pushes on the paper. The paper pushes on the pencil.
Explanation:
Newton's third law.
What is the main difference between speed and velocity
Answer:
Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement.
Explanation:
Answer:
Speed refers to the distance taken at a specific time interval. Velocity is the speed in a certain direction.
Need help on number 5 and 6
Answer:
jowieahudsfnkdmlew2l,poeq3riugjnkfmdko
Explanation:
Answer:
b and c
Explanation:
hopes this helps i took the test.
"Force is applied to an object and the object is moved over a distance in the same direction of the applied force" is the definition of (2 points)
a
balanced force
b
gravitational force
c
power
d
work
Answer:
A. Balanced force
Explanation:
Pls answer nowwwwwwwww
Answer:
1 or a the first bubble
Explanation:
Just like elephants, gorillas and dolphins, wolves educate their young. True or False?
Answer: true
Explanation: the reason it is true is because wolves educate their young to be integrated into a pack and learn to cooperate and hunt with a pack.
Answer:
true.
Explanation:
There are old wolves that need to be cared for pups that need to be educated and young adults that are beginning to assert themselves- all altering the dynamics of the pack
A force of 49 Newtons is applied to a rock, which causes it to be lifted 2 meters in 5 seconds. How much power is exerted during this time?
Select one:
9.8 W
19.6 W
56.4 W
98 W
Answer: 19.6 watts
=================================================
Explanation:
power = (change in work)/(change in time)
p = w/t
work = force*displacement
w = f*d
So we can say:
p = (f*d)/t
We know the following
f = 49 = applied forced = 2 = displacementt = 5 = change in timeLeading to...
p = (f*d)/t
p = (49*2)/5
p = 98/5
p = 19.6 watts
Side note: 1 watt is equal to 1 joule per second
the brakes applied to a car produces an acceleration of 6m/s^2 in the opposite direction to the motion. if the car takes 2s to stop after the application of brakes. calculate the distance it travels during this time .
Answer:
acceleration= -6ms^-2
Explanation:
[tex]v = u + at \\ 0 = u + ( - 6 \times 2) \\ u = 12m {s}^{ - 1} [/tex]
distance
[tex]s = ut + \frac{1}{2} a {t}^{2} \\ s = 12 \times 2 + \frac{1}{2} \times ( - 6) \times {2}^{2} \\ s = 12m[/tex]
therefore distance = 12mWhat is Kinetic Energy based on?
A.
Height
B.
Force
C.
Motion
D.
Time
Answer:
C. Motion
Explanation:
Hope this helps!
Describe an instance when the motion energy of an object changed, causing some other energy change as well.
Answer:
For instance, an immobile object located at some height above the ground has potential energy. If the object starts to fall, its potential energy is converted to motion or kinetic energy. The heavier and the higher the object is, the more potential energy it will have. Transfer of thermal energy via conduction is aided by vigorously vibrating particles in a medium that has gained energy through heating.
Explanation:
To make a quick stop, when a driver puts his or her feet on the brakes, at that moment, some of the motion energy gets modified to sound energy and thermal energy. This is one of the examples, when the motion energy of the object changes, resulting in some other change in energy as well.
• The other term for motion energy is mechanical energy. It is the energy stored within the moving objects. When the object moves faster, more amount of energy storage takes place.
• Motion energy is the sum of the kinetic and potential energy within an object, which is used to perform some kind of work.
What is happening to the average kinetic energy of the molecules in a pot of water when it is heated on a stove? Explain your answer.
Answer:
Explanation:
The average kinetic energy of molecules in a pot increases when it is heated on a stove . The heat energy is spent to decrease the intermolecular attractive force . The result is increase in kinetic energy due to increase in the velocity of molecules
formula for kinetic energy of one mole of a monoatomic gas
= 3/2 RT
when temperature increases , kinetic energy increases .
We measure forces using the unit _________________ (AND). This is because mass is in kilograms (kg) and acceleration is in m/s2 . It describes the force required to move one kilogram of mass at one meter/second/second.
Answer:
Newtons
Explanation:
Force is measured in Newtons
Which one doesn't belong in the group? oxygen, sulfur, selenium,
tellurium *
Your answer
This is a required question
borons
The potential difference across a piece of wire is 2.1 v the current in the wire is 0.30 a calculate the resistance of the wire in ohms
Answer:
7ΩExplanation:
Given:
V = 2.1 v
I = 0.30 A
R = Unknown
Solution:
R = V / I
= 2.1V / 0.30A
= 7Ω
Answer:
7Ω is the resistance of the wire in ohms
The resistance of the wire will be 7 ohms. Resistance is the antagonism strength shown in the discharge of the electric current.
What is resistance ?Resistance is the opposition force offered in the flow of the electric current. It is denoted by R.It s unit is ohms.
The given data in the problem is;
V is the potential difference = 2.1 v
I is the current = 0.30 A
R is the resistance =?
According to Ohm's law resistance is the ratio of the voltage to the current.
[tex]\rm R = \frac{V}{I} \\\\ \rm R = \frac{2.1}{0.30} \\\\ \rm R = 7 \ ohm[/tex]
Hence the resistance of the wire will be 7 ohms.
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What does water turn into when you heat it up? Worth 10 brain things
the answer is water vapor (vaporization is the process)
Answer:
Steam (or water vapor)
Explanation:
this is only worth 5 points not ten- uh anyways hope this helped?
Indiana Jones is being chased over the rooftops of Marseilles by some random villain. He looks ahead and sees that there is a 7 meter gap between this rooftop, which is 25 meters above the ground, and the next, which is 19 meters above the ground. He gathers up all his strength and runs and leaps from the higher roof to the lower. How fast must he run so he doesn't go plummeting into the street below? *
5 points
Answer:
30 mph
Explanation: