Answer:
Final K.E. is four times initial KE
Explanation:
K. E. = 1/2 mv ^2 now double the speed
new K.E. = 1/2 m (2v)^2
= 1/2 m 4 v^2
= 4 * 1/2 m v^2
Answer:
The final kinetic energy is 4 times the initial kinetic energy
Explanation:
A baseball has a mass of 1.5 kg. It is thrown by a major league pitcher at a speed of 45 m/s (100 mph). What is the momentum of the baseball?
Answer:
67.5 kgm/s
Explanation:
momentum = mass x velocity
Plz don't copy from other people. 100 points. Brainliest
Write a summary paragraph for each part discussing this experiment and the results. Use the following questions and topics to help guide the content of your paragraph.
Part 1
What was your hypothesis? According to your data, do you think your hypothesis was correct? (Be sure to refer to your data when answering this question.)
Summarize any difficulties or problems you had in performing the experiment that might have affected the results. Describe how you might change the procedure to avoid these problems.
Be sure to submit your data along with your paragraph.
Part 2
What effect did the temperature have on the viscosity of the honey? (Be sure to refer to your data when answering this question.)
Give at least two practical examples where knowledge of viscosity is important.
10. If a plane travels north for 2.5 hours at a velocity of 150 km/hr what distance did it travel?
Answer:
375 km
Explanation:
Using the equation, d = vt, we simply plug in the numbers:
v = 150 km/hr
t = 2.5 h
d = (150 km/hr)*(2.5 h)
d = 375 km
1. A meter rule is found to balance at the 48cm mark. When a body of mass 60g is suspended at the 6cm mark the balance point is found to be at the 30cm mark. Calculate, i) the mass of the meter rule 11) the distance of the balance point from the zero end, if the body were moved to the 13cm mark.
Hi there!
We can use a summation of torques to solve.
Recall the equation for torque:
[tex]\large\boxed{\Sigma \tau = rF}[/tex]
r = distance from fulcrum (balance point)
F = force (in this instance, weight, N)
We can set the fulcrum to be the balance point of 30 cm.
Thus:
Meter ruler:
Center of mass at 48 cm ⇒ 48 - 30 = 18 cm
Object:
At 6cm ⇒ 30 - 6 = 24 cm
For the ruler to be balanced:
[tex]\large\boxed{\Sigma \tau_{cc} = \Sigma \tau_{ccw}}[/tex]
Thus:
[tex]M_Rg(18) = 60g(24)\\M_R = \frac{60(24)}{18} = \boxed{80 g}[/tex]
The mass of the ruler is 80 grams.
If the body were moved to 13 cm:
B (balance point) - 13 = distance of object
48 - B = distance from ruler center of mass to balance point
[tex]80g(48 - B) = 60g(B - 13)\\\\3840 - 80B = 60B - 780\\\\4620 = 140B\\\boxed{B = 33 cm}[/tex]
The new balance point would be 33cm from the zero end.
why is there a metal grid in a microwave? explain using reference to the em spectrum
Answer:
Visible light has much smaller wavelengths and can pass through the holes unobstructed. It isn't possible to see (resolve) objects and features smaller than the wavelength of light (electromagnetic radiation) used so this is why the mesh works.
Explanation:
If an object sinks in water, would you say it is more dense or less dense than water?
Answer:
More dense
Explanation:
Density is a measure of how heavy something is compared to its size. If an object is more dense than water it will sink when placed in water, and if it is less dense than water it will float.
example of an object that has pressure energy
Answer:
Balloon
Explanation:
it inflates because of the air pressure inside
What can cause disease after an atomic bomb?
dust
hydrogen
fallout
electrons
Answer: it will be fallout or hydrogen
Explanation:
A mechanical wave is created when a source of energy causes _____.
a displacement that must be filled
a vibration to travel through a medium
the structure of a medium to be altered
A mechanical wave is created when a source of energy causes a vibration. Vibration causes disturbance in system.
What is mechanical wave?A mechanical wave is a wave that is caused by the oscillation of matter and so conveys energy through a medium.
When an energy source causes a vibration to propagate across a medium, it is called a mechanical wave.
A mechanical wave is a type of wave in which the medium's vibration is perpendicular to the wave's travel direction.
Hence, vibration is the correct answer.
To learn more about the mechanical wave, refer to the link;
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Oliver investigates conduction of thermal heat
energy.
Heats a metal rod.
the metal rod has a pin attached with wax.
Oliver measures the time it takes before the pin falls off the rod.
the pin takes 45 seconds before it falls.
a.) describe how Oliver makes hie result more reliable.
b.) oliver does a risk assessment for his investigation.
He considers the safety hazards.
Describe TWO of the safety hazards in Olivers investigation.
1.
2.
He can make the experiment more reliable by repeating the experiments about three times and then taking the average value.
What is thermal conduction?
Conduction is a mode of heat transfer in which there is no actual movement of the particles of the substance. Oliver can make his results more reliable by accurately observing the time taken before the pin falls off and by repeating the experiments about three times and then taking the average value.
Also, he need to;
Avoid an outburst of flame.Prevent the hot metal from touching his skin.Learn more about thermal conduction: https://brainly.com/question/10542041
What does it mean to take a percent of something?
Answer:
To take part of a whole number Ex: 10% of 30 is 3
Answer:
It can mean many things, but mostly taking a chunck of something whether it's money or food. Many things have percent too them.
Explanation:
Example: you are working for me i pay you 50% of my income which is 1000 % you we would split it half because 50% means half so you would get 500, i would get 500.
What is the kinetic energy of a 0.5 kg soccer ball that’s traveling at a speed of 3m/s
Answer:
K.E is 2.25 J
Explanation:
Data :
Mass = m = 0.5 kg
Velocity = v = 3 m/s
Formula for K.E
K.E = 1/2mv²
Put values
K.E = 1/2(0.5)(3)² = 2.25 J
Answer:
Explanation:
Ke=1/2mv2
Ke= 1/2(0.5kg)(3m/s)²
Ke = 2.25 J
what is the acceleration of something that is not moving?
Which of these is larger than a solar system, but smaller than the universe?
'These"
Explanation: galaxy
HELP PLZ [Kinetic and Potential Energy]
An object has a kinetic energy of 18 J. If the object's
speed is tripled, then its new kinetic energy will be
J.
Answer:
ok its 58
Explanation:
yes
What happens when light goes through a prism gizmo.
Since each color is refracted at a slightly different angle, the result is that the light splits into band of colors.
hope this helps!
1) When you hold your nose and go underwater, you can still hear sounds that are made above the water, in the air, if they are loud enough. This is because the _________________ in the air get transferred to the water.
Answer:
Vibrations
Explanation:
That is why when under water it sounds muffled and you cannot hear clearly.
Answer:
Vibrations
Explanation:
Vibrations are transferred through water. That's how dolphins are able to tell where food, family, and objects are
please vote brainliest!!
During what processes would your body use a condensation reaction? you can use specific examples.
Answer:
To cool down.
Explanation:
When your body is cold and you enter a wet environment the moisture from the air will condense on your skin much like a cold glass of water on a hot day.
A car is traveling at a speed of 30 km/hr and comes to a stop in 5 seconds. What Is it’s
acceleration?
Answer:
just devide the numbers if that dont work try to look it up online
Explanation:
The acceleration of a car traveling at a speed of 30 km/hr and coming to a stop in 5 seconds is 1.66 m/s².
Given:
Velocity, v = 30 km/hr
Time, t = 5 s
The acceleration can be computed from the ratio of velocity and time.
The acceleration is a vector quantity that can be positive or negative, and the standard unit of acceleration is m/s².
Convert velocity into meters per second:
v = 30×5/18
v = 8.33 m/s
The acceleration is calculated as:
a = v/t
Substitute the values:
a = 8.33/5
a = 1.66 m/s²
Hence, the acceleration of a car traveling at a speed of 30 km/hr and coming to a stop in 5 seconds is 1.66 m/s².
To learn more about Acceleration, here:
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A blue and a green billiard ball, each with a mass of 0.15 kg, collide directly. Before the collision, the blue ball had a speed of 3 m/s while the green ball had a speed of 2 m/s. After the collision, the blue ball stays in place while the green ball continues in motion.
Answer:
.
Explanation:
Can you specify what is the question asking for
Do two magnets create magnetic force fields that allow them to interact without touching? Did the investigation answer the question? Explain whether the investigation gave enough evidence to support the idea that invisible magnetic force fields exist.
Answer:
Magnetic forces are non contact forces; they pull or push on objects without touching them. Magnets are only attracted to a few 'magnetic' metals and not all matter.
Answer:
the person above me is correct i think respectlfully he
not correct
Explanation:
lots of time spent wondering
Would a bottleneck event of the plants in an area from the video at the top of this page result in the need for primary or secondary succession?
A: Primary Succession
B: Secondary Succession
subject: Environmental Science
The bottleneck event of the plants in an area results in secondary succession.
What is bottleneck event?A bottleneck is an event that drastically reduces the population size of an organism. The bottleneck may be caused by various events, such as an environmental disaster, the hunting or habitat destruction that results in the deaths of organisms.
Secondary successionSecondary succession is a type of ecological succession in which plants and animals recolonize a habitat after a major disturbance such as a devastating flood, wildfire, landslide, lava flow, or human activity e.g., farming or road or building construction.
Learn more about succession here: https://brainly.com/question/1212975
In single-slit diffraction, what happens to the dark fringes if the slit gets wider?.
The spacing between the fringes does not depend on the width of the slit.
The light intensity produced by the slits increases with increased width of the slit. The screen thus develops brighter fringes as the slit width increases.
On the screen, coloured fringes will be created if the white light replaces monochromatic light.
What is diffraction?Diffraction is the breaking up of an electromagnetic wave as it passes a geometric structure (e.g. a slit), followed by reconstruction of the wave by interference. Diffraction occurs for all types of waves, including sound waves.
Learn more about diffraction:
https://brainly.com/question/16749356
i need this to be correct and explane why its that answer.
You can make your exercise harder (or easier) by using this ___________ law(s) to design the perfect workout.
A.
second
B.
first
C.
third
D.
combination of all three
Answer:
option A is your answer hope it will help you
Answer:
up with the argument that trade was better than conquest or warfare at spreading religions such as Islam. Which two pieces of evidence would support this argument?Mahmūd attacked India because of its wealth from the Silk Road trade.Islamic scholars moved from Baghdad to Delhi in 1258.The Ramayana and Mahabharata are popular subjects of Southeast Asian art.Conquering armies did not spread religion and culture efficiently.Islam reached southern India before Mahmūd attacked northern India.
Explanation:
A strip of glass with pieces of paper stuck to it.The glass is attracting the pieces of paper. What does this tell you about the charges on the glass and the paper?The glass and the paper have the same charge.The glass and the paper have different charges.Neither the glass nor the paper has a charge.
Answer:
the glass and paper have diffrent charges
Explanation:
if the glass is charged positively then the paper was charged negatively
the to charges were to attract think of it as a magnet
Answer:
The answer is B. the glass and the paper have different charges
Explanation:
The glass will attract the pieces of paper. Remember opposite charges attract
which object describea an object that has no unbalanced force acting on it
Answer:
If an objecta is at equilibrium, then all the individual forces are balanced. There is no unbalanced force acting upon the objecta.
A ball is moving at 2 m/s and has a momentum of 12 kg•m/s. What is the ball's mass?
Answer:
6 kg
Explanation:
p = mv
which type of earthquake waves is the last to be recorded on a seismogram?
a child rides her bicycle in her level driveway . what form of energy does she possess
a.elastic
b.kinetic
c.potential
d.nuclear
The ______ move rock up and down like ocean waves.
Answer:
erosion lol
Explanation:
none thats all i have lol
