Answer:
A. 25 m/s
B. 100 m/s (i'm not sure about this one)
Explanation:
A. To find average velocity: velocity = distance / time
So it would be V = 500 m / 20 sec = 25 m/s
*This equation can only be used if you are finding velocity for a constant speed or direction or specific distance (in this case it was specific distance).
B. final velocity = initial velocity + acceleration * time
Initial velocity (5.0 m/s) and time (20 sec) is given but not acceleration.
To find acceleration: a = (final velocity - initial velocity) / time
To find final velocity = 5.0 + a * 20
Since there's a missing variable for both equation we will plug the final velocity equation into the acceleration equation so it looks like this :
a = ((5.0 + a * 2.0) - 5.0) / 20
Now solve to get a (acceleration)
Acceleration ends up being 0. So now that we know acceleration we can solve for the final velocity.
final velocity = 5.0 + 0 * 20
= 100 m/s
I know it's a lot but I hope that makes sense! Also for B. I'm not sure if it's right at all but if later I figure out it's wrong I'll edit my answer.
What is your average speed in each of these cases?
a. You run 100 m at a speed of 5.0 m/s and then you walk 100 m at a speed of 1.0 m/s.
You run for 100 s at a speed of 5.0 m/s and then you walk for 100 s at a speed of 1.0 m/s.
Answer:
1. 5 meters per second 1 meter per second
2. 5 m/ minute 1 m/ minute
Explanation:
A benefit to applying SQRW to your reading is faster reading abilities. Please select the best answer from the choices provided T F
Answer:This would be B
Explanation:
Answer:
False
Explanation:
Can science be certain about evidence collected even no one has ever seen an event? Explain.
Answer:
Heyo!
Explanation:
Science, they would claim, can describe elements of the natural world but not explain them. For many scientists, this is a distinction without a difference. The Nobel Prize-winning physicist Steven Weinberg, an eloquent advocate for science's place in the realm of ideas, takes this distinction at face value - in order to demonstrate that science does indeed explain something.
Hope This Helped
A bowling ball with a mass of 10 kg is moving at a speed of 3 m/s. What is its
kinetic energy?
A. 15 J
B. 90 J
C. 30 J
D. 45 J
What is the average speed between 1 and 5 seconds
Answer:
3 seconds is the average speed between 1 and 5
What is the final velocity of a truck that accelerates from rest at a rate of 5 m/s^2 for 4 seconds?
Answer:
v=20
Explanation:
v=u + at
v=0 + 5×4
v=20
how to know give reason of force
9.) The fastest land animal, the cheetah, can accelerate from 0 m/s to 33 m/s in 3 seconds. What is the cheetah's acceleration?
Answer:
11 m/s
Explanation:
A rocket is launched from a height of 3 m with an
initial velocity of 15 m/s.
What is the maximum height of the rocket? When
will this occur?
Answer:
14.25 m
1.5 s
Explanation:
Given:
y₀ = 3 m
v₀ = 15 m/s
v = 0 m/s
a = -10 m/s²
Find: y and t
v² = v₀² + 2aΔy
(0 m/s)² = (15 m/s)² + 2 (-10 m/s²) (y − 3 m)
y = 14.25 m
v = at + v₀
0 m/s = (-10 m/s²) t + 15 m/s
t = 1.5 s
The maximum height reached by rocket is 14.48m
The time the rocket will reach its maximum height is 1.53 secs
To get the maximum height, we will use the equation of motion. Using the equation of motion;
[tex]v^2=u^2-2g(\triangle s)[/tex]
where:
v is the final velocity
u is the initial velocity
g is the acceleration due to gravity
[tex]\triangle s[/tex] is the change in height
The equation can also be written as [tex]v^2=u^2-2g(s_2-s_1)[/tex]
Substituting the given parameters into the formula:
[tex]0^2=15^2-2(9.8)(s_2-3)\\0 = 225 - 19.6s_2+58.8\\19.6s_2=283.8\\s_2=\frac{283.8}{19.6}\\s_2= 14.48m[/tex]
Hence the maximum height reached by rocket is 14.48m
Get the required time this will occur.
[tex]v=u-gt\\0=15-9.8t\\9.8t=15\\t=\frac{15}{9.8}\\t= 1.53secs\\[/tex]
Hence the time the rocket will reach its maximum height is 1.53 secs
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I need help with rounding each of the following to 3 significant figures
Answer:
2.30×10³
10.3
Explanation:
The rules for significant digits are:
Non-zero digits are always significant.Zeros between significant digits are also significant.Trailing zeros are significant only after a decimal point.To write 2300.2 in three significant figures, you'll have to write it in scientific notation.
2.30×10³
To write 10.26730 in three significant figures, simply round to the tenths place.
10.3
An object moving at a constant velocity of 5.4 m/s travels for 12 s. How far will it move during that time?
Answer:
Explanation:
we know that
s=vt
given
v=5.4 m/s
t=12 s
s=5.4 m/s*12 s=64.8m
What is the power of 10 when 0.00503 is written in scientific notation?
Answer:
Negative 3
Explanation:
Bc scientific notation is the zeros either ahead or behind the actual numbers
Answer:
-3
Explanation:
Vector A has a magnitude of 63 units and points west, while vector B has the same magnitude and points due south. Find the magnitude and direction of a) A + B and b) A - B. Specify the directions relative due west.
Given :
Vector A has a magnitude of 63 units and points west, while vector B has the same magnitude and points due south.
To Find :
The magnitude and direction of
a) A + B .
b) A - B.
Solution :
Let , direction in north is given by +j and east is given by +i .
So , [tex]A=-63i[/tex] and [tex]B=63j[/tex]
Now , A + B is given by :
[tex]A+B=-63i+63j[/tex]
[tex]| A+B | = 63\sqrt{2}[/tex]
Direction of A+B is 45° north of west .
Also , for A-B :
[tex]A-B=-63i-63j[/tex]
[tex]|A-B|=63\sqrt{2}[/tex]
Direction of A-B is 45° south of west .
( When two vector of same magnitude which are perpendicular to each other are added or subtracted the resultant is always 45° from each of them)
Hence , this is the required solution .
Mental and emotional health can be improved through exercise true or false
Answer:
True
Explanation:
It can help relax your brain
In addition to 1 m = 39.37 in, the following exact conversion equivalents are
given: 1 mile = 5280 ft, 1 ft = 12 in, 1 hr = 60 min, and 1 min = 60 s. If a
particle has a velocity of 8.4 miles per hour, its velocity, in m/s, is closest to
Answer:
3.76 m/s.
Explanation:
Velocity in mile per hour (mph) = 8.4 miles per hour
Velocity in metre per second (m/s) =?
Next, we shall convert 8.4 mph to ft/h. This can be obtained as follow :
1 mph = 5280 ft/h
Therefore,
8.4 mph = 8.4 mph / 1 mph × 5280 ft/h
8.4 mph = 44352 ft/h
Next, we shall convert 44352 ft/h to in/h. This is illustrated below:
1 ft/h = 12 in/h
Therefore,
44352 ft/h = 44352 ft/h / 1 ft/h × 12 in/h
44352 ft/h = 532224 in/h
Next, we shall convert 532224 in/h to m/h. This can be obtained as follow:
39.37 in/h = 1 m/h
Therefore,
532224 in/h = 532224 in/h / 39.37 in/h × 1 m/h
532224 in/h = 13518.51664 m/h
Next, we shall convert 13518.51664 m/h to m/min. This is illustrated below:
1 m/h = 1/60 m/min
Therefore,
13518.51664 m/h = 13518.51664 m/h / 1 m/h × 1/60 m/min
13518.51664 m/h = 225.30861 m/min
Finally, we shall convert 225.30861 m/min to m/s. This is illustrated below:
1 m/min = 1/60 m/s
Therefore,
225.30861 m/min = 225.30861 m/min / 1 m/min × 1/60 m/s
225.30861 m/min = 3.76 m/s
Therefore,
8.4 miles per hour is equivalent to 3.76 m/s.
Unit conversion does not change the real value. The velocity of the particle, when converted to meters per sec, is 3.756.
What is Units conversion?Unit conversion is a way of converting some common units into another without changing their real value. for, example, 1 centimeter is equal to 10 mm, though the real measurement is still the same the units and numerical values have been changed.
In order to convert the unit of velocity, we will first convert miles to meters and then, hours to seconds.
As it is given to us,
1 mile = 5280 ft
1 ft = 12 inches
1 m = 39.37 in
Now, since 1 m = 39.37 inches, therefore
[tex]1\rm\ in =\dfrac{1}{39.37}\ m[/tex]
Converting a mile to meter,
[tex]1\rm\ miles = 5280\ ft \times 12\ inches\times \dfrac{1}{39.38} m\\\\1\ miles = 1609.652\ m[/tex]
Converting hours to seconds
[tex]1\rm\ hour = 60\ minutes \times 60\ seconds\\\\1\ hour = 3600\ seconds[/tex]
Now, converting the velocity we will get,
[tex]1 \rm\ \dfrac{miles}{hour} = \dfrac{1609.652}{3600}\ \dfrac{m}{s}\\\\1 \rm\ \dfrac{miles}{hour} =0.447\ \dfrac{m}{s}[/tex]
Now, as given to us the velocity of a particle is 8.4 miles\hour, therefore,
[tex]8.4 \rm\ \dfrac{miles}{hour} =8.4 \times 0.447\ \dfrac{m}{s}\\\\8.4 \rm\ \dfrac{miles}{hour} =3.756\ \dfrac{m}{s}\\\\[/tex]
Hence, the velocity of the particle when converted to meters per sec is 3.756.
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How much time does it take a football to travel 50 m, if it is moving at 13.5 m/s?
Answer:
It will take 3.7 seconds for the football to travel 50 meters.
Explanation:
Since the football is traveling at 13.5 meters per second, we need to divide the distance needed to travel by how fast it is moving,
50/13.5 = 3.7 seconds
If you apply the same amount of force to a 0.1-kilogram baseball and a 0.05-kilogram tennis ball, which one will accelerate more?
Answer:
The tennis ball.
Explanation:
Because the baseball is heavier, it requires more force to move it, whereas the tennis ball requires less force, so it will move more. Hope that makes sense!
If we apply the same amount of force to a 0.1-kilogram baseball and a 0.05-kilogram tennis ball, then the 0.05-kilogram tennis ball will accelerate more because the force is the product of the mass and acceleration.
What is Newton's second law?Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.
As given in the problem statement If you apply the same amount of force to a 0.1-kilogram baseball and a 0.05-kilogram tennis ball,
force on any object = acceleration × mass of the object
As given the same amount of force is applied to both the objects then the object having less mass would experience a greater amount of acceleration.
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a driver brings a car to a full stop in 2.0s its acceleration is -11m/s. how far did the car travel while braking
Answer:
22
Explanation:
What kinds of changes in substances are always physical changes?
The difference between a physical change and a chemical change is composition. In a chemical reaction, there is a change in the composition of the substance. In a physical change there is a difference in the appearance, smell, or simple display of a sample of matter without a change in composition.
Hope This Helps, Good Luck!
what changes if the light is underwater and the light goes into air
Answer:
Therefore, when a light ray traveling through air enters water or glass it slows down, refracts, and bends toward the normal line. ... For example, when light goes from glass or water to air, it speeds up. Refraction changes how objects look.
Explanation:
The light slows down when it passes from the less dense air into the denser glass or water. This slowing down of the ray of light also causes the ray of light to change direction. It is the change in the speed of the light that causes refraction.
How light and water affects the speed of the light?Light is slowed down in transparent media such as air, water and glass. The ratio by which it is slowed is called the refractive index of the medium and is always greater than one.Because of the physical differences in the makeup of the materials light actually travels slower through water and glass. Speed of light in a vacuum and air = 300 million m/s or 273,400 mph. Speed of light in water = 226 million m/s or 205,600 mph. Speed of light in glass = 200 million m/s or 182,300 mph.The light slows down when it passes from the less dense air into the denser glass or water. This slowing down of the ray of light also causes the ray of light to change direction. It is the change in the speed of the light that causes refraction.
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What the full name of DNA?
Answer:
Deoxyribonucleic acid
Explanation:
Answer:
Deoxyribonucleic acid
Explanation: Hopes that helps
Drop the ball from 12 inches and record how high the ball bounces. Repeat this 3 more times at the 12 inch height.
Which statement describes a question that can be answered by a scientific
investigation?
A. It asks why a scientist is curious about a phenomenon.
B. It is based on an observation of a natural phenomenon.
C. It is based on a philosophical argument.
O
D. It asks whether an investigation is worth doing.
SUBMIT
Answer: b
Explanation:
It is based on an observation of a natural phenomenon can be answered by a scientific investigation. Thus option B is correct.
What is scientific investigation ?Scientific investigation can be defined as a continuous process involving different steps to find out the answer to a specific scientific question by using scientific method.
The basic steps includes observation, which can be further used to develop, design of experiment and improve a hypothesis and an explanation based on an observed phenomenon.
There are different steps involved in Scientific Investigation such as
• Observation is the first step of the scientific investigation to observe the process involve in the step of inspection and conduction of the investigation by asking questions.
• Asking Questions is purely based on observation and it make sure that every detail is already known and a query existing can be solved quickly.
• making of a Hypothesis involves proper explanation of the query and it is most important part of the scientific investigation, it can come from a phenomenon.
• conclusion involves to the information drawn out, follow a proper scientific or a mathematical statement followed by Communication of the information from the investigation
Thus option B is correct.
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If velocity is positive, which would most likely yield a negative acceleration?
1. A final velocity that is faster than the initial velocity.
2. A time that is less than half hour.
3. An initial velocity that is faster than a final velocity.
4. A tune that is greater than half hour.
Please help there’s only 52 minutes left...
Answer:
An initial velocity that is faster than a final velocity.
Explanation:
The most likely yield of a negative acceleration given that velocity is positive is : ( 3 ) An initial velocity that is faster than a final velocity
What is Negative acceleration ?A negative acceleration is rate of change of velocity in the negative direction ( i.e decrease in velocity with time ). A negative acceleration is also known as dacceleration. To achieve a negative acceleration the final velocity has to be less than the initial velocity.
Hence we can conclude that The most likely yield of a negative acceleration given that velocity is positive is : ( 3 ) An initial velocity that is faster than a final velocity.
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What is the acceleration of the object in the graph?
Answer:
jus did this, the answer is A, -0.8 m/s^2 :)
Explanation:
How much of a kilogram is a gram?
A prism is used to ?
a) change the path of light by reflection and both refraction
b) rotate the image
c) disperse the light into its component
d) all of these
Answer:
D
Explanation:
prism is able to do all.
Prism can do all of the three function mentioned in the choices.
A prism is used to change the path of light by reflection and both refraction , rotate the image and disperse the light into its component. Prism is used for both reflection as well as refraction of light. There are some prism which can be used for image rotation is called image Rotation Prisms.
These types of prism are used to rotate, invert, or revert an image. Image Rotation Prisms are extensively used in microscopes, telescopes, rifle scopes, microscope, astronomy and also in defense industries. It is also used to disperse the light into different colour so we can conclude that prism can do all of the three function mentioned in the choices.
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5x+3 (x-2)t5=7
What is x
Answer:
x=37/20 i think not so sure tho
the mass of an object is 5 kg .what does it mean
Answer:
Explanation:
If the mass of an object is 5 kg, it means that it weighs 5 kg
Hope this helps
plz mark as brainliest!!!
If a distance-time graph contains the point (4, 15), what does that tell you about the runner?
Explanation:
It is given that there is distance time graph. The slope of any distance time graph will give the speed or velocity of the object.
In the context, it is seen that there is a point in the distance - time graph. And the values of the point in the graph is (4,15).
Now here, the distance is plotted in the ordinate or the vertical y-axis while time is plotted in the abscissa or the horizontal x-axis.
Thus the point (4,15) tells us that the object has traveled 15 units in time equal to 4 seconds.
