Answer:
Because it is the standard operational range for measuring the body temperature of a living individual.
Explanation:
When making a measuring equipment like a thermometer, you attempt to keep the reading range (Span) as small as possible so that the reading is as accurate as feasible. Because sensors are often rated in percent of span (in this example, span = 45 C–32 C = 13 degrees Celsius), One percent of 13 equals 0.13 degrees Celsius, thus if your sensor has a usual accuracy of 1%, your temperature reading is accurate to roughly 0.1 degrees Celsius.
Your precision would be 0.2 degrees Celsius if you doubled the span. The reading accuracy is now becoming unsatisfactory. Readability is another advantage of analog and mercury clinical thermometers. The markings for 0.1 deg C would be ten times closer together if a mercury thermometer had ten times the range (span). There is a limit to the device's readability.
5. How far can a car travel in 14 hours while going at a speed of 75 miles per hour?
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Here we go ~
Speed of the car is 75 miles per hour and it travels for 14 hours. so the distance travelled by it in the given period of time can be calculated using this formula ~
[tex]\qquad \sf \dashrightarrow \: d = v \sdot t[/tex]
[tex]\qquad \sf \dashrightarrow \: d = 75 \times 14[/tex]
[tex]\qquad \sf \dashrightarrow \: d = 1050 \: \: miles[/tex]
so, it can travel 1050 miles in 14 hours
Answer:
1050 miles
Explanation:
Simply:
d = 75 m/hr * 14 hr =1050 miles
( see how the 'hr' cancels and you are left with miles ?)
An 845–g bar of ice is initially at –25 °C. The latent heat of fusion of ice is 334 kJ/kg, the specific heat of ice is 2050 J/(kg·°C), and the specific heat of water is 4180 J/(kg·°C). Determine how much energy is required if the final temperature of the system is to reach 39 °C.
Taking into account the definition of calorimetry, sensible heat and latent heat, the amount of heat required is 463.28 kJ.
Calorimetry, sensible heat and latent heatCalorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).
Latent heat is defined as the energy required by a quantity of substance to change state.
When this change consists of changing from a solid to a liquid phase, it is called heat of fusion and when the change occurs from a liquid to a gaseous state, it is called heat of vaporization.
Energy required in this case-25°C to 0 °CIn firts place, the melting point of water (temperature at which it changes state from solid to liquid) is 0°C.
So, first of all you must increase the temperature from -25 ° C (in solid state) to 0 ° C, in order to supply heat without changing state (sensible heat).
The amount of heat a body receives or transmits is determined by:
Q = c× m× ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
In this case, you know:
c(ice)= 2050 [tex]\frac{J}{kgC}[/tex] m= 845 g= 0.845 kgΔT= Tfinal - Tinitial= 0 °C - (-25) °C= 25 °CReplacing:
Q1= 2050 [tex]\frac{J}{kgC}[/tex] × 0.845 kg× 25 °C
Solving:
Q1= 43,306.25 = 43.3 kJ
Change of stateThe heat Q that is necessary to provide for a mass m of a certain substance to change phase is equal to
Q = m×L
where L is called the latent heat of the substance and depends on the type of phase change.
In this case, you know:
n= 0.845 kgΔHfus= 334 [tex]\frac{kJ}{kg}[/tex]Replacing:
Q2= 0.845 kg× 334[tex]\frac{kJ}{kg}[/tex]
Solving:
Q2= 282.23 KJ
0 °C to 39 °CSimilar to sensible heat previously calculated, you know:
c(liquid)= 4180[tex]\frac{J}{kgC}[/tex]m= 0.845 kgΔT= Tfinal - Tinitial= 39 °C - 0 °C= 39 °CReplacing:
Q3= 4180 [tex]\frac{J}{kgC}[/tex] × 0.845 kg× 39 °C
Solving:
Q3= 137,751.9 J= 137.75 kJ
Total heat requiredThe total heat required is calculated as:
Total heat required= 43.3 kJ + 282.23 kJ + 137.75 kJ
Total heat required= 463.28 kJ
In summary, the amount of heat required is 463.28 kJ.
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The amount of energy required if the final temperature of the system is to reach 39 °C is 463288.15 J
How to determine the heat required change the temperature from –25 °C to 0 °C Mass (M) = 845 g = 845 / 1000 = 0.845 KgInitial temperature (T₁) = –25 °C Final temperature (T₂) = 0 °Change in temperature (ΔT) = 0 – (–25) = 25 °C Specific heat capacity (C) = 2050 J/(kg·°C) Heat (Q₁) =?Q = MCΔT
Q₁ = 0.845 × 2050 × 25
Q₁ = 43306.25 J
How to determine the heat required to melt the ice at 0 °Mass (m) = 0.845 KgLatent heat of fusion (L) = 334 KJ/Kg = 334 × 1000 = 334000 J/KgHeat (Q₂) =?Q = mL
Q₂ = 0.845 × 334000
Q₂ = 282230 J
How to determine the heat required to change the temperature from 0 °C to 39 °C Mass (M) = 0.845 KgInitial temperature (T₁) = 0 °C Final temperature (T₂) = 39 °Change in temperature (ΔT) = 39 – 0 = 39 °C Specific heat capacity (C) = 4180 J/(kg·°C)Heat (Q₃) =?Q = MCΔT
Q₃ = 0.845 × 4180 × 39
Q₃ = 137751.9 J
How to determine the heat required to change the temperature from –25 °C to 39 °CHeat for –25 °C to 0°C (Q₁) = 43306.25 JHeat for melting (Q₂) = 282230 JHeat for 0 °C to 39 °C (Q₃) = 137751.9 JHeat for –25 °C to 39 °C (Qₜ) =?Qₜ = Q₁ + Q₂ + Q₃
Qₜ = 43306.25 + 282230 + 137751.9
Qₜ = 463288.15 J
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Consider an object of mass 2kg on a ramp with βs=0.5 and βk=0.4.
If we keep increasing the ramp angle, what is the angle() that the object starts to move downward? Give your answer in degree with 1 decimal place.
Answer:
bs angle will move in 1.5
A foul ball is hit straight up into the air with a speed of 25 m/s.
how long is it in the air?
Answer:
31.25 m
Explanation:
The foul ball experiences upward linear motion thus:
initial velocity(u) - 25m/s
final velocity(v) - 0m/s
velocity due to gravity - -10m/s2 (since the ball moves upwards)
Hence:
v2=u2+2(gs)
0=625+2(-10*s)
0=625-20s
-625=-20s
s=31.25m
what is kinematics ?
name its father and explain its history !
ty ~
Hello There!!
1st QuestionWhat is kinematics?Answer=> Let The Answer be "x"
________________________________
2nd questionName it's fatherAnswer=> He don't have a child so he is not a father
________________________________
3rd QuestionExplain its HistoryAnswer=> Kinematics is a part of science not history.
__________________________________
Hope this helps :D
Answer:
i just wrote this much hope it will help u little
Explanation:
kinematics is the branch of physical which deals with the study of motion as the function of time.Frank reuleaux is known as the father of kinematics.the word *kinematics" comes from a greek word "kinesis" meaning motion.
What energy is produced by a 150 w lightbulb lit for 4.6 hours
W = Pt
W = 150 x (4.6 x 3600) = 2.484 x 10⁶ J
Light nulbs do not "produce" energy.
When YOU bring electrical energy from somewhere and pour it through the light bulb, the bulb turns some of it into light energy and the rest into heat energy .
(150 W) x (4.6 hr) =690 watt-hrs
or 0.69
(100 POINTS AND BRAINLIEST)
1. When elements form a molecule, what is true about the oxidation numbers of the atoms in the molecule?
a. The sum of the oxidation numbers must equal zero.
b. All oxidation numbers from the same molecule must be positive.
2. True or False: All oxidation numbers from the same molecule must be negative.
a. True
b. False
3. Which of the following elements will bond with oxygen resulting in a 1:1 ratio of oxygen and the element?
a. lithium
b. boron
c. beryllium
d. nitrogen
Answer:
1. a
2. b (FALSE)
3. c (beryllium)
Explanation:
Answer:
the answer for number one is A. number 2 is B. and number 3 is C.
Explanation:
theys a Quizlet made on these three questions already so I just got it from there. they should be correct pls let me know if they are.
Which of the following is an example of in-group bias? A. Avery, who loves to go to car shows B. Shelly, who thinks her cheerleading team is better than any other school's team C. Zoe, who likes to shop more than anything else D. Matt, who loves to watch his favorite team play football
Answer:
B because since SHE is in the team she is in group and it is bias because she treats the other teams as competition. Hope this helps!
Explanation:
Describe how energy is transferred in one of the sequences? [3]
Answer:
Thermal energy transfers occur in three ways: through conduction, convection, and radiation. When thermal energy is transferred between neighboring molecules that are in contact with one another, this is called conduction.
Explanation:
A roller coaster is moving at 10 m/s at the top of a hill and 22 m/s at the bottom of the hill two seconds later. What is the acceleration of the roller coaster?
Answer:
The acceleration is
Explanation:
Acceleration = final velocity - initial velocity
---------------------------------------
speed
Initial velocity = 10m/s
final velocity = 22m/s
speed = 2 secs
acceleration = 22 - 10
-----------
2
= 12/2
6 m/s^2
The electrostatic force of attraction between two spheres that are one meter apart is 10 newtons (N). If the charge on each sphere is doubled, what is the new electrostatic force between the two spheres?
20 N
30 N
40 N
80 N
Answer:
its 20 n because of the temeture
Explanation:
because
To which group/family does each of these belong? A. Sulfur _________ B. Sodium _________ C. Argon _________ D. Silicon _________ E. Chlorine _________ F. Phosphorus_________
Answer:
A. Sulfur _________ group 16 chalcogens
B. Sodium _________ group 1 alkali metals
C. Argon _________ group 18 noble gases
D. Silicon _________ group 14 carbon family
E. Chlorine _________ group 17 halogens
F. Phosphorus_________ group 15 pnicogens
when a tractor trailer and a smart car collide head on, who hits who with greater force? explain your reasoning
Answer:
The smart car hit with the greater force
Explanation:
Despite the trailers weight, the smart car moves with more speed and momentum than that of the trailer...
I don't even understand what I'm typing
Both will exert equal and opposite force on each other.
When a tractor-trailer and a smart car collide head-on, we can determine the relative forces experienced by each vehicle using Newton's second law of motion.
According to this law, the force acting on an object is equal to the rate of change of its momentum.
Let's consider the tractor-trailer as object 1 with mass [tex]\(M_1\)[/tex] and velocity [tex]\(V_1\)[/tex], and the smart car as object 2 with mass [tex]\(M_2\)[/tex] and velocity [tex]\(V_2\)[/tex].
The force exerted on object 1 due to object 2 [tex](\(F_{12}\))[/tex] can be calculated as:
[tex]\[F_{12} = M_1 \cdot \frac{{dV_1}}{{dt}}\][/tex]
Similarly, the force exerted on object 2 due to object 1 [tex](\(F_{21}\))[/tex] can be calculated as:
[tex]\[F_{21} = M_2 \cdot \frac{{dV_2}}{{dt}}\][/tex]
Since the collision is head-on, the direction of the forces will be opposite for the two objects.
To determine which object experiences a greater force, we need to compare the magnitudes of [tex]\(F_{12}\) and \(F_{21}\)[/tex] = 0 by Newton's third law.
Thus, both will exert equal and opposite force on each other.
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A dog barking at the sound of the postal carrier delivering mail is reacting to what type of cue?
A. External
B. Internal
Answer:
A. External
Explanation:
External stimulus includes touch/pain, vision, smell, taste, and sound.
A magnetic field of 0.0037 T is measured at a distance of 2 cm from a long
straight current carrying wire. What is the magnitude of the current flow in the
wire?
Hi there!
We can use Ampère's Law to derive an expression for the magnetic field strength produced by an infinitely long current-carrying wire:
[tex]\oint B \cdot dl = \mu_0 I_{encl}[/tex]
B = Magnetic Field Strength (T)
dl = Differential length along path
μ₀ = Permeability of Free Space (Tm/A)
I = Enclosed current (A)
The integral is a cross product, so the cosine of the angle between the magnetic field and the path of integration is used. However, for a straight current-carrying wire, the path is ALWAYS parallel to the magnetic field, so since cos(180) = 1, we can disregard the cross product.
Additionally, the path of integration is equivalent to:
[tex]l = 2\pi r[/tex]
[tex]B \cdot l = \mu_0 I_{encl}\\\\B * 2\pi r = \mu_0 I_{encl}\\\\B = \frac{\mu_0 I_{encl}}{2\pi r }[/tex]
Rearrange to solve for enclosed current:
[tex]I_{encl} = \frac{2\pi rB}{\mu_0} = \frac{2\pi (0.02)(0.0037)}{(4\pi *10^{-7})} = \boxed{370 A}[/tex]
(100 POINTS AND BRAINLIEST)
1. What are the four groups of carbon compounds found in living things?
2. Classify each substance as either sugar, starch, protein, or nucleic acid.
a. the major compound that makes up the skin
b. glucose
c. the major compound in potatoes
d. DNA
3. What is the difference between saturated and unsaturated fat? Why are partially hydrogenated fats useful for making potato chips but not particularly healthy for humans to eat?
1. carbohydrates, lipids, proteins, and nucleic acids.
2. a is protein b is sugar c is starch and d is nuclear acid
3. What is the difference between saturated and unsaturated fat? it's that Saturated fats have the maximum number of hydrogens possible, while unsaturated fats have a double bond between two of the carbons. part 2. Why are partially hydrogenated fats useful for making potato chips but not particularly healthy for humans to eat? I was not able to find a different answer for it than part 1.
How many kg of ice at 0°C must be added to 0.6kg of water at 100°C in an insulated 0.1kg copper container and its contents to 30°C? The specific heats of water and copper are 4.2 and 0.39 kJ/kgK, respectively; the heat of fusion of ice is 335 kJ/kg.
Answer:
.389 kg of ice required
Explanation:
The heat absorbed by melting the ice and warming it to 30 C
must be equal to the heat lost by cooling the existing water and the copper from 100 to 30 C
First, melt the ice (this occurs at a constant temperature)
x * 335 kj/kg and warm this water x * 4.2 kj/kg-k * 30 k
(x = kg of ice required)
then cool the copper and the .6 kg water from 100 to 30 C (70 degrees)
.1 kg * .39 * 70 K + .6kg * 4.2 kj/kg-K * 70 K
then equate the two amounts of heat
x ( 335 + 4.2 *30) = .1 * .39 * 70 + .6 * 4.2 * 70
solve for x = .389 kg
what is the speed of light in air ?
[tex] \\ [/tex]
ty! ~
Answer:
the speed of light in air is about 299,000,000 and 3×10⁸ m/s
a car weighting, 14500 N skids on ice, which has a kinetic coefficient of friction 0.2. It then hits a patch of dry road area which has a Kinetic coefficient of friction of 0.8. What is the change in friction force experienced by the car?
The change in friction force experienced by the car is
What is friction?The friction is caused between two uneven contacting surfaces.
When car is on ice, the friction force is
f = μ N
f₁ = 0.2 x 14500 = 2900N
When the car is on dry road, the friction force is
f₂ = 0.8 x 14500 =11,600 N
The change in friction force =11600 - 2900 = 8700N
Thus, the change in friction force experienced by the car is 8700N.
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The contents of your résumé should always be:
o relevant
the same
personal
current
The contents of your résumé should always be relevant.
What is resume?A resume is a brief information about a person's academic life achievements and organizational experience stated in short in order to get a highly paid job.
A resume should include all the relevant information that help the employers easily shortlist candidates of their choice relating the job profile. It is understandable by resume that who you are and why you're a good fit for the job.
Thus, the contents of your résumé should always be relevant.
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What is the relationship between Earth’s revolution and seasons. What evidence can you provide to explain how Earth’s revolution determines the seasons?
Think!!!! Write Claim, Reasoning and add evidence.
Answer:
Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.
Explanation:
It's all about Earth's tilt!
Claim:- Many people believe that Earth is closer to the Sun in the summer and that is why it is hotter. And, likewise, they think Earth is farthest from the Sun in the winter.
Although this idea makes sense, it is incorrect.
It is true that Earth's orbit is not a perfect circle. It is a bit lop-sided. During part of the year, Earth is closer to the Sun than at other times. However, in the Northern Hemisphere, we are having winter when Earth is closest to the Sun and summer when it is farthest away! Compared with how far away the Sun is, this change in Earth's distance throughout the year does not make much difference to our weather.
There is a different reason for Earth's seasons.
Reasoning:- earth's axis is an imaginary pole going right through the center of Earth from "top" to "bottom." Earth spins around this pole, making one complete turn each day. That is why we have day and night, and why every part of Earth's surface gets some of each.
Earth has seasons because its axis doesn't stand up straight.
But what caused Earth to tilt?
Long, long ago, when Earth was young, it is thought that something big hit Earth and knocked it off-kilter. So instead of rotating with its axis straight up and down, it leans over a bit.
By the way, that big thing that hit Earth is called Theia. It also blasted a big hole in the surface. That big hit sent a huge amount of dust and rubble into orbit. Most scientists think that that rubble, in time, became our Moon.
As Earth orbits the Sun, its tilted axis always points in the same direction. So, throughout the year, different parts of Earth get the Sun’s direct rays.
Sometimes it is the North Pole tilting toward the Sun (around June) and sometimes it is the South Pole tilting toward the Sun (around December).
It is summer in June in the Northern Hemisphere because the Sun's rays hit that part of Earth more directly than at any other time of the year. It is winter in December in the Northern Hemisphere, because that is when it is the South Pole's turn to be tilted toward the Sun.
Earth's lopsided orbit
Evidence- Earth's perihelion (point closest to Sun) = 91,400,000 miles from Sun
Earth's aphelion (point farthest from Sun) = 94,500,000 miles from Sun
While that is a difference of over 3 million miles, relative to the entire distance, it isn’t much.
And, believe it or not, aphelion (when Earth is farthest from the Sun) occurs in July, and perihelion (when we are closest) occurs in January. For those of us who live in the Northern Hemisphere where it's summer in July and winter in January, that seems backwards, doesn't it? That just goes to prove that Earth's distance from the Sun is not the cause of the seasons.
Answer:
Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.
Hope it helps..
Which type of evidence was used to tie Ted Bundy to the murder of Lisa Levy?
Explanation:
identified by one of the Chi Omega survivors as the assailant, and hair and fiber evidence tied him to the Leach murder. His trial for the Florida attacks in June 1979 was the first-ever nationally televised trial in the United States.
PLEASE HELP 100 POINTS! Please fill in the scale distance from sun and diversion factor, listing off the numbers works
We will take it Cm
Scale factor
1km=10^5cmSo
1cm=10^{-5}km#Mercury
580cmVen us
1080cmEarth
1500cmMars
2280cmJupiter
7780cmSaturn
14300cm#Uranus
28700cmNeptune
45000cmHow does the image make the message in the "Mummy, what happens to us if the bomb drops?" poster more clear?
A. The poster shows a clear picture of a girl having a serious talk with her parents.
B. The poster shows all the supplies needed to survive in picture format.
C. The poster provides an emotional picture of a young, innocent girl with a slightly worried expression to make protective feelings.
D. The poster shows the actual bomb attack.
Answer:
C. The poster provides an emotional picture of a young, innocent girl with a slightly worried expression to make protective feelings.
Explanation:
The girl looks quite worried in the poster. Attached is the image:
A copper wire of length 25 cm is in a magnetic field of 0.20 T. If it has a mass of 10 g, what is the minimum current through the wire that would cause a magnetic force
equal to its weight?
Select one:
1.3 A
1.5 A
2.0 A
4.9 A
Hi there!
Recall the equation for magnetic force on a wire:
[tex]F_B = B \times iL[/tex]
[tex]F_B[/tex] = Magnetic force (N)
B = Magnetic field strength (0.2 T)
i = Current in wire (? A)
L = Length of wire (0.25 m)
This is a cross-product, but we can assume the field is perpendicular to the current since it is not explicitly stated otherwise.
The equation for the weight of an object (Force due to gravity) is given by:
[tex]F_g = mg[/tex]
m = mass of object (0.01 kg)
g = acceleration due to gravity (9.81 m/s²)
Set the two equations equal to each other and solve for 'i'.
[tex]F_B = F_g\\\\BiL = mg\\\\i = \frac{mg}{BL} = \frac{0.01 * 9.81}{0.2 * 0.25} = \boxed{1.962A \approx 2.0 A}[/tex].
The most effective way to reduce waste is to not create it in the first place.
True
False
Answer:
True
Explanation:
If there isnt any waste it would reduce the quantity however the waste that is present needs to be dealt with so......
What happens to the force applied by the person pushing the crate (Fapplied
) as the frictional force increases? What can they do to change this force?
The force applied by the person pushing the crate is not enough as the frictional force increases because more friction causes slowing of moving object.
What is friction?Friction is defined as the force resisting the relative motion of an object when moving on the surface of another object. This force slow down the speed of a moving object.
So we can conclude that the force applied by the person pushing the crate is not enough as the frictional force increases because more friction causes slowing of moving object.
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PLEASE HELP
Which of the following is best determined by applying the principles of
relativity and uncertainty, rather than Newtonian physics?
A. The speed of a truck
B. The length of an object at rest
C. The position of a bird flying overhead
D. The position of an electron
By applying the principles of relativity and uncertainty, rather than Newtonian physics, the position of an electron is best determined. The correct option is D.
What is principle of uncertainty?It states that position and the velocity of an object can't be measured exactly at the same time. One of them may have the approximate value, using the principle of uncertainty.
Every object is moving relative to some frame of reference. So, exact velocity and at what position an object is, can't be find by theory of Newtonian physics. Speed of a truck, length of object at rest and position of a flying bird flying overhead can be found using the Newtonian physics.
An electron is very minute particle whose velocity is unpredictable at any location. So, the position of an electron is best determined by the theory of relativity and uncertainty.
Thus, The correct option is D.
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A bullet of mass 25 g moving with a velocity of 200 cm/s is stopped within 5 cm of the target. The average resistance offered by the target is:
[tex]\huge{\boxed{{\colorbox{red}{1 N}}}}[/tex]
that's my answer
vf²=vi²-2ad (vf=0, stop)
vi²=2ad
200²=2.a.5
a = 200² : 10
F = ma
F = 25 x 200² : 10
F = 1 x 10⁵ dyne = 1 N
What do these two have an common ? A slice of banana turning brown, A banana getting ripe on the counter
Answer:
After some time on the counter, ripe bananas will develop a brown peel. Bananas contain the enzyme polyphenol oxidase, and when the enzyme interacts with oxygen, it causes a chemical reaction. This chemical reaction, known as enzymatic browning, changes the banana's peel and fruit to brown
Explanation:
