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if you ran 3.1 miles in 0.5 hours. what was your speed
Answer:
speed= 6.2 m/hrExplanation:
distance= 3.1 mile
time=0.5 hours
s=d/t
s=3.1/0.5
speed= 6.2 m/hr
If you run for a distance of 3.1 miles in 0.5 hours, then the speed in miles per hour will be 6.2 m/hr.
What is Speed?A scalar quantity in kinematics and common usage, an object's speed is the size of the change in its position over time or the amount of change in its position per unit of time.
As the duration of the time interval approaches zero, the instantaneous speed is the maximum limit of the average speed. The distance traveled divided by the duration of the interval represents the average speed of an object over a period of time.
Given information,
Distance covered, d = 3.1 miles
Time taken, t = 0.5 hours
Speed = [tex]Distance/time[/tex]
Speed = 3.1/0.5
Speed = 6.2 m/hr
Therefore, the speed while running is 6.2 m/hr.
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Which of the following is a result of the transfer of energy?
- gravity
- matter
- magnetism
- sound
Answer: Sound
Explanation: it's asking which of the following is a result of transfer of energy and sound comes from vibrations
Calculate the change in momentum of a 45 kg runner who starts out at 1 m/s and speeds up to 3 m/s. Which anser choice is correct 90 kg⋅m/s 45 kg⋅m/s 135 kg⋅m/s 0 kg⋅m/s
momentum can also be defined in terms of newton second
that is P=F.V
now v =vf-vi
v=3 m/s-1m/s=2 m/s
now F=W=45 kg
therefore
change in momentum=F.v
P=45*2=90 kg.m/s
How to solve 5,897,159 milligrams into kilograms?
Answer:
5.897159 kilograms
Answer:
5.897159 kilograms
Explanation:
5,897,159÷1000000=5.897159
a tungsten and coil has a resistance of 12 ohm at 15 degree celsius is the temperature coefficient of resistance of tungsten is 0.004 calculate the equal resistance at 80 degree Celsius
Answer:
The resistance of the tungsten coil at 80 degrees Celsius is 15.12 ohm
Explanation:
The given parameters are;
The resistance of the tungsten coil at 15 degrees Celsius = 12 ohm
The temperature coefficient of resistance of tungsten = 0.004/°C
The resistance of the tungsten coil at 80 degrees Celsius is found using the following relation;
R₂ = R₁·[1 + α·(t₂ - t₁)]
Where;
R₁ = The resistance at the initial temperature = 12 ohm
R₂ = The resistance of tungsten at the final temperature
t₁ = The initial temperature = 15 degrees Celsius
t₂ = The final temperature = 80 degrees Celsius
α = temperature coefficient of resistance of tungsten = 0.004/°C
Therefore, we have;
R₂ = 12×[1 + 0.004×(80 - 15)] = 15.12 ohm
The resistance of the tungsten coil at 80 degrees Celsius = 15.12 ohm.
What statement most accurately classifies this cell?
Choose 1 answer:
(Choice A) A It is a plant cell.
(Choice B) B It is a fungal cell.
(Choice C) C It is a bacterial cell.
(Choice D) D It is an animal cell.
Answer:
D It is an animal cell.
Explanation:
a body has got its mass 100 kg .calculate it's weight
Answer:
220.46 lbs
Multiply the mass by 2.205 for an approxinate result.
The answer is 220.462.
Explain why the cyclist must be fed in order to continue to pedal? answer fast please
The cyclist must be fed in order to continue to pedal because food will
provide him/her with energy to continue with it.
Cycling and other forms of activities involve the use of energy by the body ton perform them and the energy dwindles with time which is why we eat everyday to gain more energy.
The cyclist will have to eat foods such as carbohydrates so as to have more
energy to continue to pedal.
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Let G be the garvitational constant and R be the radius of earth. If the radius of the earth becomes half, the new value of gravitational constant will be
Answer:
G = 1.670 × [tex]10^{-11}[/tex] [tex]m^{3}kg^{-1}s^{-2}[/tex]
Explanation:
From Newton's law of universal gravitation,
F = [tex]\frac{GMm}{R^{2} }[/tex]
Where F is the force of attraction, G is the gravitational constant, M is the mass of the earth, R is the radius of the earth.
From Newton's second law of motion,
F = mg
mg = [tex]\frac{GMm}{R^{2} }[/tex]
g = [tex]\frac{GM}{R^{2} }[/tex]
⇒ G = [tex]\frac{gR^{2} }{M}[/tex]
If the radius of the earth becomes half,
R = [tex]\frac{R}{2}[/tex], then;
G = [tex]\frac{gR^{2} }{4M}[/tex]
Given that: g = 9.8 m/[tex]s^{2}[/tex], radius of the earth is 6371000 m, mass of the earth is 5.972 × [tex]10^{24}[/tex]kg, then;
G = [tex]\frac{9.8*(6371000)^{2} }{4*5.972*10^{24} }[/tex]
= 1.670 × [tex]10^{-11}[/tex] [tex]m^{3}kg^{-1}s^{-2}[/tex]
A rock is thrown vertically upward at an initial velocity of 70 m/s. What is the approximate acceleration of the rock when it reaches its maximum height (assume upward is the positive y direction)?
Answer:
Zero.
Explanation:
Given that a rock is thrown vertically upward at an initial velocity of 70 m/s. What is the approximate acceleration of the rock when it reaches its maximum height
(assume upward is the positive y direction)?
Since the reached the maximum height, the final velocity V will be equal to zero.
Using the first equation of motion to find the time.
And since it is a vertical direction, and not horizontal, the acceleration a will be equal to zero.
Suppose you receive $5.00 at the beginning of a week and spend $1.00 each day for
lunch. You prepare a graph of the amount you have left at the end of each day for one
6.
week.
A)
Would the slope of this graph be positive, negative, or zero?
B)
Why?
How long is the flea in the air from the time it jumps to the time it hits the ground
Answer:
0.613 milliseconds
Explanation:
Two students both kick a soccer ball. Havanna's ball travels three times as fast as Mitzi's ball. How does the kinetic energy of the two soccer balls compare? A. Both soccer balls have the same amount of kinetic energy, because they have the same mass. B. Mitzi's soccer ball has 3 times as much kinetic energy, because it travels a third of the speed. C. Havanna's soccer ball has 9 times the kinetic energy, because it travels at 3 times the speed. D. Havanna's soccer ball has 3 times because it travels at 3 times the speed.
Answer:
the answer is c. Havanna's soccer ball has 9 times the kinetic energy, because it travels at 3 times the speed
Explanation:
an elastic material of length 3m is to be stretched to produce an extension three times it's original length. Calculate the force required to produce the extension if the force constant of the material is 982.3 Newton per metre
Answer:
F = 8840.7 N
Explanation:
The parameters given are:
Length L = 3 metres
Extension e = 3 × 3 = 9m
Force constant K = 982.3 Newton per metre
From Hook's law,
Provided the elastic limit is not extended, the extension is directly proportional to the force applied.
That is,
F = Ke
Substitute all the parameters into the formula
F = 982.3 × 9
F = 8840.7 N
An instrument is defective for all of the following conditions EXCEPT:_______
a. when an instrument is overdue.
b. when an instrument is dishonored.
c. when an instrument is presented.
d. when an instrument is irregular.
e. when an instrument is incomplete.
Answer:
I believe its C
What is the length of the line to the correct degree of precision?
92 mm
9.2 mm
9.2 cm
9.23 cm
Answer:
9.2 cm
Explanation:
on a ruler you can only measure in cm
and the precision is of one decimal point
Yvette drops her cell phone as she is getting out of the truck one day she noticed that the cell phone fell 1.5m to the ground how fast was the phone moving right before hitting the ground
Answer:
The speed was 5.42 m/s
Explanation:
The height of fall of the phone s = 1.5 m
The phone was at rest in her hand, so the initial velocity u = 0 m/s
The velocity right before the phone strikes the ground v = ?
Using the equation
[tex]v^{2}[/tex] = [tex]u^{2}[/tex] + 2gs
where
g is the acceleration due to gravity = 9.81 m/s^2
substituting values, we have
[tex]v^{2}[/tex] = [tex]0^{2}[/tex] + 2(9.81 x 1.5)
[tex]v^{2}[/tex] = 29.43
v = [tex]\sqrt{29.43}[/tex] = 5.42 m/s
What is non-science? Philosophy or art.
Answer:
both
Explanation:
because science is not included in both of them
25 POINTS!! ANSWER CORRECTLY FOR BRANLIEST!
Which of the following statements describes an interaction between the atmosphere and biosphere?
Water and its vapor move through air.
Earth's internal heat warms the layer of air around it.
Oceans provide an environment for sustaining marine life.
Life is possible on Earth due to layers of air that surround it.
Answer:
the answer is probably most likely D first and if thats incorrect than its B
♡ Hope it helps♡
which term describes the energy an object has because of its motion? Potential Nuclear Kinetic Thermal
Answer:
The answer is Kinetic Energy
Explanation:
Kinetic energy is the term describes the energy an object has because of its motion. Option C is correct
What is kinetic energy?The energy of the body by the virtue of its motion is known as the kinetic energy of the body. It is defined as the product of half of mass and square of the velocity.
KE =1/2mv²
Where,
m is the mass
KE is the kinetic energy
v is the velocity of the body
The word "kinetic energy" refers to the energy that an item possesses as a result of its motion.
Hence option C is correct.
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What part of physics are you looking forward to the most?
Answer:
all of it
Explanation:its cool
How much does Earth weight?
Answer:
About 13, 000,000,000,000,000,000,000,000 pounds.
Explanation:
Answer:
6,000,000,000, 000,000,000,000,000 kilograms (6 x 1024 kilograms, or 1.3 x 1025 pounds).
In her dissertation research, a graduate student finds a correlation of +0.95 between two of the variables being studied. How should she interpret this correlation coefficient
Answer:
Explanation:
A correlation of +0.95 between two variables signifies a strong positive relationship between the two measured variables (the dependent and independent). The value is usylay called the correlation Coefficient (r) as it measures the level or degree of relationship or correlation between two measured linear variables. The value ranges between - 1 and +1 with + signifying a positive relationship (increase or decrease in one variable leads to corresponding increase or decrease in the other) while a negative correlation means (a decrease in A leads to increase in B and vice versa). A correlation Coefficient of 0 means no relationship and the strength of the relationship increases as the value approaches - 1 or +1.
Graphs are ____ of relationships.
Answer:
Diagrammatic representation
9. Carlos jumps out of a hovering helicopter. After he opens his parachute, his acceleration due to gravity decreases
to zero. This is because
A The force of air resistance becomes equal in magnitude to his weight.
B. The force of gravity has become zero.
C. Air resistance must be zero
D. He must have struck the ground,
Answer:
A The force of air resistance becomes equal in magnitude to his weight.
Explanation:
When Carlos jumped out of the helicopter, he fell with a downward force which is proportional to his weight.
His weight is the product of his mass and acceleration due to gravity.
When the parachute is deployed, air resistance between the air molecules and the surface area of the parachute generates a drag force, which acts upwards.
If the drag forces exceeds his weight, then his net force will be directed upwards.
If his weight exceeds the drag forces, then the net force on his body will be downwards.
In the case that his drag force, and his weight are equal, there will be a zero net force on him, and he will experience no acceleration.
So, if after he opens his parachute, his acceleration due to gravity decreases to zero, then we can say that this is because the force of air resistance (drag) becomes equal in magnitude to his weight.
The unit meters corresponds to what variable
Do you have any options? My guess would be distance but I could be wrong.
Record your hypothesis here: Record the results from step one of the experiment (dropping the objects in the air): First trial: Second trial: Third trial:
Answer:
First trial (Big Ball vs. Feather):The big ball hit the ground first.
Second trial (Small Ball vs. Feather):The small ball hit the ground first.
Third trial (Big Ball vs. Small Ball):They hit the ground at the same time
Explanation:
HOPE IT HELP :)3. Briefly explain why measured data
must have units.
Answer:
because it helps data to be meaningful
Explanation:
I took a test and and got 100%
Does the horizontal distance d travelled by the ball depend on the height of release? If it does depend on the height, what is the mathematical relationship between the variables
Answer:
Explanation:
Yes , the horizontal distance travelled by the ball will depend upon the height of release .
When a ball is thrown at some angle from a height , it has two components , the vertical component and horizontal component . The ball goes in horizontal direction due to its horizontal component . Its vertical component has no role to play . But the horizontal range covered by the body thrown
depends upon the duration of time in which it remains in air . The longer it remains in air , the greater distance it can cover horizontally .
Horizontal distance covered = t x horizontal velocity
If V be the velocity of throw and Vx be its horizontal component
Horizontal distance covered = t x Vx
Now t depends upon the height . If height rises , time of fall will increase so horizontal distance covered will increase .
If h be the height from which the body is thrown , Vy be the vertical upward component of initial velocity
from the relation
s = ut + 1/2 at²
h = - Vy t + 1/2 at²
As h increases , t will increase and therefore horizontal distance covered will increase. If the ball has only horizontal velocity initially , Vy = 0
h = 1/2 gt²
[tex]t = \sqrt{\frac{2h}{g} }[/tex]
Horizontal distance covered = t x Vx
= [tex]\sqrt{\frac{2h}{g} } \times V_x[/tex]
From this expression also
Horizontal distance covered is proportional to [tex]\sqrt{h}[/tex] .