answer: C
Explanation:
move from one atom to another, the atom that loses an electron becomes positively charged and an atom that gains electrons becomes negatively charged
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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David is mowing his lawn. He has been riding on the mower at 50m/hr for 2.5 hours? What is the distance of the area David has mowed
Answer:
125 metres
Explanation:
Distance = speed × time
Here , speed = 50m/hr
time = 2.5 hr
So,
Distance = 50 × 2.5
=125 m
Answer:
the distance of the area David has mowed = 125 m
Explanation:
given:
He has been riding on the mower at 50m/hr for 2.5 hours?
find:
What is the distance of the area David has mowed
formula = .distance = velocity x time
where velocity = 50 m/hr.
time = 2.5 hours
plugin values into the formula:
distance = 50 m/hr x 2.5 hr.
distance = 125 m
therefore,
the distance of the area David has mowed = 125 m
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
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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 .
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.
Mental and emotional health can be improved through exercise true or false
Answer:
True
Explanation:
It can help relax your brain
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:
Drop the ball from 12 inches and record how high the ball bounces. Repeat this 3 more times at the 12 inch height.
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.
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how long will it take a running horse to travel 260 m and attain a speed at 12 m/s from rest?
Answer:
Explanation:
s=vt
t=s/v
s=260 m
v=vf-vi=12-0=12 m/s
therefore
t=260/12=21.67 sec
What is electrical conductors and insulators?
Answer:
In a conductor, electric current can flow freely, in an insulator it cannot. "Conductor" implies that the outer electrons of the atoms are loosely bound and free to move through the material. ... Most atoms hold on to their electrons tightly and are insulators.
Explanation:
because it is
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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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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a chemical reaction a temperature change may occur because of the breaking or formation of chemical bonds that release excess energy. Since there is a change in temperature why wouldn't this reaction be considered a physical change instead of a chemical change ?
Answer:
Explanation:
in some reactions we see this as a change in the temperature. ... The study of energy changes (particularly heat) in chemical reactions is known as ... When a chemical reaction occurs, bonds in the reactants break, while new bonds form in the product. ... Physical changes can also be classified as exothermic or endothermic.
Your favorite taco stand is 800 m away, and closes in 15 minutes. How fast do you have to run to make it on
time?
You must run at least 53.3333333 meters a minute.
is anyone good at physics who can help me??
A dog trots from -11 m to 4 m in 14 s . whats is its velocity ?
Answer:
1.07 m/s
Explanation:
This is a simple speed distance time question.
first, we need to determine the distance between -11 and 4.
(think of a number line).
We add 4 to 11 using absolute value (i.e taking away negatives), and we get 15 m, our distance. We are attempting to find speed, and we have our time.
Speed is distance/time.
Now we have our equation, we plug in our variables.
speed (aka velocity)= 15/14.
speed= 1.07142857143
If we round to 2 place values, our speed is 1.07 m/s.
The velocity of the dog's trots is 1.07 m/s after using the speed-distance-time relationship.
What is the distance?Distance is a numerical representation of the distance between two items or locations. Distance refers to a physical length or an approximation based on other physics or common usage considerations.
It is given that:
A dog trots from -11 m to 4 m in 14 s.
As we know, the speed-distance-time relationship:
Speed = distance/time
The distance = 4 - (-11)
The distance = 4 + 11
The distance = 15 m
Time = 14 seconds
Speed = 15/14
The velocity of the dog's trots is:
Speed = 1.07 m/second or 1.07 m/s
Thus, the velocity of the dog's trots is 1.07 m/s after using the speed-distance-time relationship if the dog trots from -11 m to 4 m in 14 s.
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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:
how to know give reason of force
What is the average speed between 1 and 5 seconds
Answer:
3 seconds is the average speed between 1 and 5
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 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:
Which of the following is NOT an early sign of heat illness?
Dizziness
Headache
Flushed face
Excessive sweating
Struggling to perform
Struggling to perform is not an early sign of heat illnesses.
There are times when the body system will be unable to dissipate heat effectively. When this happens, heat illness bounds to occur.
Also, heat illnesses tend to occur when the balance of salt and water in the body becomes unbalanced, the temperature rises unexpectedly or the sweet couldn't keep an individual cool.
Some of the early signs includes Headache, dizziness, Muscle cramps, weak pulse among other related symptoms.
Based on the above explanation, we can see that struggling to perform is not an early sign of heat illnesses.
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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
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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The speed and direction of a moving object referred to as which of the following
A. Distance
B.speed
C.velocity
D.time
Answer:
velocity.
Explanation:
velocity includes both speed and direction of the motion!
Two movers use a ramp to load a piano into a truck
• Describe how the potential energy and kinetic energy of the piano change as it sits on the ground, as it is moved into the truck, and as it sits in the truck
Enter your answer in the space provided
The potential energy increases as the piano change its position as it sits on the ground, as it is moved into the truck, and as it sits in the truck.
What is mechanical energy?The sum of all the energy in motion (total kinetic energy) and all the energy that is stored in the system (total potential energy) is known as mechanical energy.
As given in the problem, two movers use a ramp to load a piano into a truck, we have to describe how the potential energy and kinetic energy of the piano change as it sits on the ground, as it is moved into the truck, and as it sits in the truck.
The potential energy increases as the piano change its position as it sits on the ground, as it is moved into the truck, and as it sits in the truck.
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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:
How much of a kilogram is a gram?
Differentiate between static friction and sliding friction.
Answer:
Static friction prevents the motion of an object while sliding friction is a type of frictional motion between two surfaces in contact.
Explanation:
A firework is fired from the ground straight up on a planet with an acceleration due to gravity of 10.56 m/s/s. The firework will not explode until the moment where it would have started to move back down again. The initial speed of the firework is 90.1 m/s. Use this information to find the height at which the firework explodes and the time it will be traveling upward.
Answer:
384 m
8.53 m/s
Explanation:
Given:
v₀ = 90.1 m/s
v = 0 m/s
a = -10.56 m/s²
Find: Δy and t
v² = v₀² + 2aΔy
(0 m/s)² = (90.1 m/s)² + 2 (-10.56 m/s²) Δy
Δy = 384 m
v = at + v₀
0 m/s = (-10.56 m/s²) t + 90.1 m/s
t = 8.53 s
