Answer:
flammability of hydrogen
Explanation:
Chemical properties are properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter. They include reactivity, flammability, and the ability to rust.
1.
100 cm are equivalent to 1 m. How many cm are equivalent to 3 m? Briefly explain how you
could convert any number of meters into a number of centimeters
Answer:
[tex]300[/tex] cm are equivalent to [tex]3[/tex] m.
Explanation:
[tex]100[/tex] cm are equivalent to [tex]1[/tex] m.
[tex]100 \mathrm{~cm}$=1{~m}$[/tex]
[tex]3 \mathrm{~m}$=3\times100[/tex]
[tex]=$300{~cm}$[/tex]
To convert meters ([tex]\mathrm{~m}$[/tex]) into number of centimeters ([tex]\mathrm{~cm}$[/tex]), multiply that number by [tex]100[/tex].
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Precision is how close a series of measurements are to ______
Answer:
Accuracy is how close a measured value is to an accepted value. Precision is how close measurements are to one another. To make measurements, you have to evaluate both the accuracy and the precision to get a correct value.
The speed of sound in air is about 330m/s. How long will it take to travel 1km answer in seconds to one decimal point
Answer:
3.03
Explanation:
time=distance/speed
1km=1000m
1000÷330
=3.030
Name:
Mellisayang
Kinematics practice problems #1
1
A high school athlete runs 1.00 x 10 m in 12.20 s. What is the velocity in m/s and km/h?
Answer:
[tex]velocity = \frac{distance}{time} \\ velocity = \frac{10}{12.20} \\ velocity = \frac{50}{61} \\ multiply \: by \: 3.6u \: can \: convert \: to \: km \: per \: hour \\ velocity = \frac{50}{61} \times 3.6 \\ v = \frac{180}{61} \\ v = 2.95 \frac{km}{h} \\ thank \: you[/tex]
what is known physical quantity
Answer:
those quantity which are measured and expressed on mathematical process is called physical quantity
Blaise is driving a car that is traveling 6.03 m/s and accelerates uniformly at 2.5 m/s² to reach a speed of 12.9 m/s. How long does it take for this acceleration to occur?
It would take 0.3639 seconds for this acceleration to occur.
Given the following data:
Initial speed, U = 6.03 m/sFinal speed, V = 12.9 m/sAcceleration, a = [tex]2.5 \;m/s^2[/tex]To find how long it takes for this acceleration to occur, we would use the first equation of motion.
Mathematically, the first equation of motion is given by the formula;
[tex]V = U + at[/tex]
Substituting the values into the equation, we have;
[tex]12.9 = 6.03 + 2.5t\\\\2.5t = 12.9 - 6.03\\\\2.5t = 6.87\\\\t = \frac{2.5}{6.87}[/tex]
Time, t = 0.3639 seconds
Therefore, it would take 0.3639 seconds for this acceleration to occur.
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(b) On what factor does the mechanical advantage of a simple machine depend? (a) N/m B. Very short answer questions, 1. What is the principle of simple machine? 2. 3. The efficiency of simple machine is 75%. What does it mean? 4. S. What is lever? In how many classes is lever classified? Write the name of a simple machine used to change the direction of force. 6.the velocity ratio of a pulley system is 4.what does it mean? 0 Reliant Science - 9
Answer:
No.b answer
the ratio of the length of the lever arm where the force is applied divided by the length of the lever are that lifts the load.
No.1 answer
if there is no friction in a simple machine, work output and work input are found to be equal in the machine.
No.3 answer
machine that is 75% efficient means that 75% of the work input is obtained as the useful output and the remaining 25% has been lost in overcoming the friction.
No.4 Answer
A lever is a simple machine made of a rigid beam and a fulcrum. In 3 calss lever is classified.
Simple pulleys change the direction of the force used to lift an object over a distance.
ratio of distance travelled by effort to the distance travelled by load in the machine.
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I just got asked a question about quantum entanglement. Can someone please give me a basic understandable of what it is
What is the speed of a walking person in m/s if the person travels 2000 m in 35 minutes?
Distance = 2000m
Time = 35 minutes = 35×60 sec = 2100 sec
We know, Speed = Distance/Time
Therefore, Speed
= 2000m/2100s = 20/21 m/s
Answer: 20/21 m/s
Hope it helps! Please do comment
A dog runs 20 m east and then 35 m west in 12 seconds.
What is the dog speed? What is the dogs velocity?
Answer: Dog's speed = (20 + 35) /12 = 4.583 m/s
Dog's velocity = (20-35)/12 = -1.25 m/s
Explanation: Speed is a scalar quantity so we don't care about direction which means we add the magnitude of both the directions i.e. east and west.
About the velocity, it's a vector quantity. So, we must be very careful with the directions and signs. In cartesian coordinates system, we generally take the right side of origin as the positive x-axis and the left side of origin as the negative x-axis. So, considering the same fact, we consider east as positive side and west as the negative side.
Therefore, when we add 20m + (-35m), we get = -15m and you already have the time period of 12 s.
What do kinematic equations do?
Answer:
The kinematics equations describe the motion of an object undergoing constant acceleration
Explanation:
The kinematics equations describe the motion of an object undergoing constant acceleration. These equations relate the variables of time, position, velocity and acceleration of a moving object, allowing any of these variables to be solved for if the others are known
(c) What are the factors of work? Also write their relation with work.
Answer:
Explanation:
Appreciation for your work.Good relationships with colleagues.Good work-life balance.Good relationships with superiors.Company's financial stability.Learning and career development.Job security.Attractive fixed salary.Good relationships with colleagues. Good work-life balance. Good relationships with superiors. Company's financial stability.
3. A Tylenol has 80 mg of acetaminophen.
How many grams is that
[tex]\boxed{\sf 1g=1000mg}[/tex]
[tex]\\ \sf\longmapsto 80g[/tex]
[tex]\\ \sf\longmapsto \dfrac{80}{1000}[/tex]
[tex]\\ \sf\longmapsto 0.08g[/tex]
How does Bolsa describe his new client?
Answer:
loco
Explanation:
Which of the following speeds is greatest? (2.54 cm = 1.00 in.)
O 10 km/h
O 10 m/s
O 10 ft/s
O 10 mi/h
O 10 yd/s
Answer:
Hi, There!
O 10 m/s
O 10 yd/s
------------------------------------------------------------------------------------------------------------------
Have a great day!
When converting all the given speeds to km/h and after comparing them, we have that the greatest is option 2: 10 m/s.
To find which of the given speeds is greatest, we need to convert all the units to km/h so we can compare the values.
Option 1. 10 km/hOption 2. 10 m/s to km/h[tex]v = 10 \frac{m}{s}*\frac{1 km}{1000 m}*\frac{3600 s}{1 h} = 36 km/h[/tex]
Option 3. 10 ft/s to km/h[tex]v = 10 \frac{ft}{s}*\frac{1 km}{3280.8 ft}*\frac{3600 s}{1 h} = 11.0 km/h[/tex]
Option 4. 10 mi/h to km/h[tex]v = 10 \frac{mi}{h}*\frac{1 km}{0.6214 mi} = 16.1 km/h[/tex]
Option 5. 10 yd/s to km/h[tex]v = 10 \frac{yd}{s}*\frac{1 km}{1093.6 yd}*\frac{3600 s}{1 h} = 32.9 km/h[/tex]
Therefore, the greatest speed is option 2: 10 m/s.
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what is the relationship between the variables on this graph? The temperature does not have an effect on flow time. As the temperature increases, the flow time increases. As the temperature increases, the flow time decreases.
Answer: As the temperature increases, the flow time increases.
Explanation: i took the test
The relationship between the variables on this graph is that As the temperature increases, the flow time increases, therefore the correct answer is option B.
What is the kelvin scale of temperature?It is a scale of temperature used to measure the temperature, the kelvin scale of temperature is also known as the absolute scale of temperature.
The Standard International unit of thermodynamic temperature is the kelvin, often known less frequently as the degree Kelvin. The formal definition of one kelvin is 1/273.16 of the thermodynamic temperature of pure water's triple point.
As shown in the graph as the temperature increase across the X axis the flow time is increasing as well, these two variables are directly proportional to each other.
Thus, The graph shows a link between the variables, showing that when the temperature rises, flow time also rises, hence option B is the proper response.
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7. A car travels a certain distance with a speed of
50 km/h and returns with a speed of 40 km/h.
Calculate the average speed
Plz help
A baseball is thrown a distance of 20 meters. What is its
seconds to cover the distance?
speed if it takes 0.5
Answer:
I want to say 10 seconds but im not 1000% sure
Answer:
Average speed= distance traveled/ time taken.
Explanation:
You shouldn't need any formula, just use common sense. You dummy. It goes 20m 10h half a sec. DUH!!!
What phrase describes a scientific law
what are 2 ways elastic energy affects us as humans
Answer:
The coil spring of a wind-up clock.
An archer's stretched bow.
Explanation:
An Internet connection transfers 32 kilobytes per second. How many bytes are being transferred every second?
Answer:
32,000
Explanation:
There are 1,000 bytes in each kilobyte, so therefore 32,000 bytes are transferred each second.
1. The atomic number of an element is the same as the number of ______ that the element has.
Answer:
Explanation:
The total number of protons in the nucleus of an atom gives us the atomic number of that atom. It is represented with the letter ‘Z.’ All the atoms of a particular element have the same number of protons, and hence the same atomic number. Atoms of different elements have different atomic numbers.
Which of the following objects has the greatest inertia?
5.0 kg object moving 5.0 m/s
15 kg object moving at 1.0 m/s
20.0 kg object at rest
10.0 kg object at rest
Last one has the greatest inertia
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What is the correct definition of speed?
A. time (hours or seconds)
B. time per distance (hours per mile or seconds per meter)
C. distance per time (miles per hour or meters per second)
Answer:
C
Explanation:
The correct definition is distance / time, although teachers like to mix you up sometimes. A question like "How many minutes per mile does it take to go 3miles in 20 minutes?" In this question, the units are upside down.
The standard answer is what is the rate of speed when when 3 miles are covered in 2 hours.
Here the answer is 3/2 = 1.5 miles / hour which is the standard way of writing speed or rate. distance / time.
Fatima is watching her pet cat, Winter, napping in the sun. Fatima is curious about the heart rate of Winter when she is napping, so she develops this scientific question: Does a cat’s heart rate change while it is napping
We have that for the question, Does a cat’s heart rate change while it is napping?
Cats heart rate do not increase while napping.
The range of heart beat of a cat is 140 and 220 bpm
From the Question we are asked
Does a cat’s heart rate change while it is napping.
The answer is NO
Cats heart rate do not increase while napping. Cat have a normal heart beat maximum of 220 beats per minute consistently.The range of heart beat of a cat is 140 and 220 bpm
Therefore
There is something with a cat with heart rate above this number.
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motorcycle starting from rest cover 200 metre distance in 6 second calculate final velocity and acceleration of the motorcycle
An apple weighing 1 N falls through a distance of 1m. How much work is done
on the apple by the force of gravity?
Answer:
W = F × d
W = 1 × 1
W = 1 Joule
step by step explanation
An apple is having a force of 1 N and it travels to a distance of 1 m then the work done on the apple by the force of gravity will be equal to 1 J.
What is Work?Work is a physics term used to describe the transfer of energy that occurs when an object changes above a distance because of an external force, at least some of which is given in the vector of the dislocation. The element of the strong acting all along the path multiplied by the length of the path can be used to calculate work if the force is constant.
Mathematically, this idea is expressed as W = fd, where W is the effort and f is the force multiplied by d, the distance. Work is completed whenever the pressure is applied at an angle with regard to displacement.
As per the given information in the question,
Force, f = 1 N
Distance, d = 1 m
Then, the work done will be,
W = fd
W = 1 × 1
W = 1 J.
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Which is the best estimate for the mass of a typical lineman on a high school football team
1. 100,000 g
2. 100,000 kg
3. 100,000 mg
We have that the best estimate for the mass of a typical lineman on a high school football team is
[tex]100,000 g=100kg[/tex]
From the options
1. 100,000 g
2. 100,000 kg
3. 100,000 mg
Generally
A Typical lineman cannot be as small as
[tex]100000mg=0.1kg=100g[/tex]
A Typical linesman cannot be as massive as
[tex]100,000kg[/tex] as that is unrealistic
With the Average Mass of A Typical linesman can be
[tex]100,000 g=100kg[/tex]
In conclusion
The best estimate for the mass of a typical lineman on a high school football team is
[tex]100,000 g=100kg[/tex]
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Q23 In Hindu chronology, the longest time measure is a para. One para equals 311 040 000 000 000 years. Calculate this value in megayears, hours and in seconds. Write your answers in scientific notation.
The conversion in megayears, hours and seconds are :
[tex]1 \: para \: = \: 3.11 \times {10}^{8} \: megayears[/tex]
[tex]1 \: para \: = \: 2.72 \times {10}^{18} \: hours[/tex]
[tex]1 \: para \: = \: 9.81 \times {10}^{21} \: seconds[/tex]
Given that :
1 para = 311040000000000 years
1 mega year = 1 million years :
311040000000000 years expressed in mega years will be :
Let : number of mega years = p
1 mega year = 1,000,000 years
p = 311040000000000 years
Cross multiply :
311040000000000 × 1 = 1,000,000 × p
311040000000000 = 1000000p
p = 311040000000000 / 1000000
p = 311040000 mega years
p = 3.1104 × 10^8 mega years
[tex]1 \: para \: = \: 3.11 \times {10}^{8} \: megayears[/tex]
In hours :
In hours : 8760 hour = 1 year
Let : number of hours = p
1 year = 8760 hours
311040000000000 years = p
Cross multiply :
p = 8760 × 311040000000000
p = 2724710400000000000
p = 2.72 × 10^18 hours
[tex]1 \: para \: = \: 2.72 \times {10}^{18} \: hours[/tex]
In seconds :
31536000 seconds = 1 year
Let : number of hours = p
1 year = 31536000 seconds
311040000000000 years = p
Cross multiply :
p = 31536000 × 311040000000000
p = 9808957440000000000000
p = 9.81 × 10^21 hours
[tex]1 \: para \: = \: 9.81 \times {10}^{21} \: seconds[/tex]
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How many megabytes does a 30-gigabyte hard drive hold
Answer:
30,000
Explanation:
1 gig is 1000 megabytes
