Physics High School
Answers
Answer 1
Answer:
3000J
Explanation:
Given parameters:
mass = 400kg
speed = 15m/s
Unknown:
P.E at the highest point of the roller coaster = ?
Solution:
Due to the law of conservation of energy, the potential energy at the highest point can be solved using the formula of the kinetic energy
Potential energy = [tex]\frac{1}{2}[/tex] mv²
m is the mass
v is the velocity
Potential energy = [tex]\frac{1}{2}[/tex] x 400 x 15 = 3000J
Related Questions
The Young’s modulus for steel is 2.0 x 10 11 N/m 2 and the interatomic spacing is 2.6A . Find the increase in inter atomic spacing, when a steel wire is subjected to a stress of 5 x 10 9 N/m
Answers
Answer:
Increase in Atomic Spacing = 6.5 x 10⁻¹² m = 6.5 pm
Explanation:
The young's modulus of a material is given by the following formula:
Young's Modulus = Stress/Strain
2 x 10¹¹ N/m² = (5 x 10⁹ N/m²)/Strain
Strain = (5 x 10⁹ N/m²)/(2 x 10¹¹ N/m²)
Strain = 0.025
Now, the formula for the strain in the steel wire can be written in terms of atomic spacing as follows:
Strain = Increase in Atomic Spacing/Initial Atomic Spacing
0.025 = Increase in Atomic Spacing/2.6 °A
Increase in Atomic Spacing = (0.025)(2.6 x 10⁻¹⁰ m)
Increase in Atomic Spacing = 6.5 x 10⁻¹² m = 6.5 pm
14. Determine the kinetic energy of a 1000-kg roller coaster car that is moving with a speed of
40.0 m/s.
Answers
Answer:
200,000 J
Explanation:
The kinetic energy of an object can be found by using the formula
[tex]k = \frac{1}{2} m {v}^{2} \\ [/tex]
m is the mass
v is the velocity
From the question we have
[tex]k = \frac{1}{2} \times 1000 \times {40}^{2} \\ = 500 \times 400[/tex]
We have the final answer as
200,000 J
Hope this helps you
Hello!!
Sorry to contradict the before answer, but he's wrong.
The formula is correct:
k = 1/2 * mv²
If we replace it with our data:
k = 1/2 * (1000 kg) (40 m/s)²
Here is the problem, 40^2 is = 1600, so the result is wrong:
k = 500 Kg * 1600 m²/s²
And if we resolve it:
k = 800 000 Joules
Then the kinetic energy of the roller coaster car is 800 000 Joules.
3. The earth exerts a gravitational force of 530 N on an object. What is the mass
of the object in kilograms?
Answers
Answer: Approximately 54 kg
===============================================
The force is F = 530 newtons.
The acceleration of gravity on earth is approximately 9.8 m/s^2, so a = 9.8
Use Newton's second law to find m
F = m*a
530 = m*9.8
9.8m = 530
m = 530/9.8
m = 54.0816326530612
m = 54
The mass is about 54 kg.
Answer:
around 53-54
Explanation:
the gravitational pull is almost 10 (9.807 m/s²) so as long as the numbers are not that big its easy and mostly accurate to divide by 10
define volume with example
Answers
Answer:
The volume of an object is a measure of the amount of space occupied by that object
Explanation:
Answer: A student might use a graduated cylinder to measure volume of a chemical solution in milliliters
Explanation:
Volume is the quantity of three-dimensional space enclosed by a closed surface,an often quantified numerically using the SI derived unit, the cubic metre.
state various methods by which energy is obtained from sea ; and explain in detail any one of them.
Answers
Explanation:
Answer. Answer: There are three basic types that allow us to use ocean for its energy. We can use the waves (wave energy,wave power), oceantidal power(ocean high and low tides), and we can even use temperature differences in the water to create an energy (Ocean Thermal Energy Conversion, OTEC).
15 points :) plz hurry tho
Answers
Answer:
The rock in Diagram A seems to not have that much stress on it, the one in B seems to be pushing itself together, the one in C seems to be pulling itself apart and the one in D seems to be sliding past each other. A has not had any stress as its staying still while B seems to be a tectonic plate where subduction is occurring, in rock C it also seems to be a tectonic plate where it is a Convergent Boundary, rock C seems to be a Divergent Boundary and D seems to be a Transform Boundary.
Explanation:
FLVS Science 7
Can you give be brainliest please? It took me a while to think of this answer.
How much does a 200 kg car weigh?
Answers
Answer:
42,000 lbs
Explanation:
100 kg is 210 lbs.
200 x 210 lbs =
42,000 lbs
The weight of the car is product of its mass and acceleration due to gravity of earth. Hence, the weight of the 200 kg car is 1960 N.
What is acceleration due to gravity ?
The gravitational force of an object is the force by which attracts other objects into its center of mass. Earth attracts every objects into its center and that is why we are all standing on the ground.
The weight we experience on earth is due to this gravitational force and it decreases when we move far from earth. The acceleration due to gravity is the acceleration by which an object accelerates downwards due to earth's gravity (g).
Weight of an object = mass × g
g for earth = 9.8 m/s²
mass of the car = 200 Kg.
then, weight = 200 kg × 9.8 m/s² = 1960 N.
Therefore, the weight of the car is 1960 N.
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state the name given to the energy that is needed to melt the ice cube: latent __________.
Answers
Answer:
Explanation: heat of fusion
GIVING BRAINLIEST TO THE RIGHT ANSWER examine the information for the two samples described in the chart. How are zinc and sodium alike?
A. They have the same hardness at room temperature.
B. They are both dolids at room temperature.
C. They have the same color.
D. They have the same boiling point.
Answers
They’re both solids at room temperature; everything else was different for every other answers, but in each box it says “Stare at room temperature: solid” so, they’re both solids at room temperature
Well they both have the same mass of 9g. And they are both solids at room temp. So probably B
god dang every one is dead rn on brainly
Answers
Answer:
not me, im alive haha
Explanation:
Well not everyone!! I’m here!
In boiling water, water molecules move apart and escape in the form of water vapor. The process is called_
Answers
Answer:
Evaporation
Explanation:
Evaporation occurs when a liquid changes to a gas. During evaporation, molecules gain enough thermal energy to escape from the liquid surface into the air as water vapor. Water-vapor molecules spread out, breaking completely free of each other, and then disperse or spread out among the other gas molecules in the air.
Hope this helps stay safe
love anyla..
Answer:
evarporation that is the answer i think because molecules of liqid are sperated thats why when in boiling water The molecules move apart and escape in vapour even i don't think it is the right answer
Npk fertilizer is called a complete fertilizer,why?
Answers
Answer:
Complete fertilizers or balanced fertilizers are so-called because of their amounts of nitrogen, phosphorus, and potassium. ... If your soil already had an excess of one of the three nutrients in NPK, you could actually be harming some of your plants by adding more of it to the soil
Explanation:
Children are ready for more complex storybooks:
Around one.
Around two.
Around two and a half to three years old.
Around three.
Around four years old.
Answers
Answer:
4
Explanation:
Because that is when they're mind learns how to read
This is a lab for science can you help with punctuation errors? Also where it says figures I have pictures :) (I am in 7th grade btw so no hate)
Leaf lab
Purpose: Find out if the leaf area of a given tree is bigger on the North or the Southside. Learn more advanced statistical analysis.
Research: To find the area of an irregular shape it’s whole + part ½ which is whole plus part divided by 2. The shape of the leaf will be traced. They are affected by the Earth's tilt and the sun because we are in the North Hemisphere.
Figure 1 is an example of the Earth’s tilt and how the sun gives a certain amount of heat to different parts of the Earth.
The south gets more sun it’s because the leaves burn while the north leaves get less sun. The north leaves are thinner but bigger in area than the leaves that get a lot of suns. This makes them smaller or bigger because one side might get more sun which makes north leaves bigger.
Hypothesis: The leaves on the Northside are bigger.
Procedure:
1. Collect 35 leaves from the Northside and 25 leaves from the Southside.
2. A tree that is not in shade.
3. Press the leaves flat.
4. Trace the leaves onto graph paper using both sides of the page keeping North and South separate.
5.Count whole (w) and partial squares (p) and calculate the area of each leaf in squares 6. with the equation A= W+ ½ P.
Figure 2 is an example of the equation A= W+ ½ P. There are 4 whole´s and 8 parts so the area is 8 inches squared because 4+ ½ 8= 8.
7. Create a north and South leaf data table.
8. Discard leaves afterward.
9. Put the leaf area in order from smallest to greatest in each table.
10. Find the mean, median, mode of the 2 data sets as well as the entire range of 50 leaf data sets.
11.Create a histogram
Use the range to find the size of 7 bins. USe the nearest whole number
Sort leaves
Count leaves and creates a chart
12.Create histograms of individual data using Microsoft Excel or google docs
5. Results: The north's side leaves are bigger than the south side by a few a lot,
6. Conclusion: It was a warm sunny day and windy. The experimenter gathered 25 leaves from the North and South sides with all different sizes and colors. The hypothesis was supported based on the data collected. One reason why it was supported was that the North overall average was greater than the South. The Northside leaves are greater is that it is proven by facts. If someone compared a random south leave to a random north leaf, most times the North would be bigger because the probability of getting a big leaf is higher for North rather than South. The second piece of evidence from my data is that the South bin had more leaves in smaller bins while the North bin had an equal amount of leaves in the high and low bins. The third piece of evidence is that the Northside leaves had a bigger average than the South leaves. Also, the Southside had the smallest leaf while the Northside had the biggest leaf. The entire group also supported this.
7. Errors and ways to improve: Try to get different trees and instead of picking a few leaves in a certain area in the north and south, pick random ones. Also, gather more and different leaves. Different weather conditions could affect the leaves.
Figure 3, is the north bin where most of the leaves are bigger.
Figure 4, the south bin where most of the leaves are smaller.
Figure 5, the class north bin where some most leaves are small but some are big.
Figure 6, the class south bin where mostly all of the leaves are small.
Figure 7 is the tree used to pick leaves off.
Answers
Answer:
First of all you should give more then 5 points for this.And the errors are you should add a space between all of the steps and info of the lab. And read everything over again and where you take a breath at or if you stop add a coma or a period.
This contributes most directly to which short-term human-induced environmental change?
habitat destruction
eutrophication
global warming
wildlife hazard
Answers
Answer:
Global warming
Explanation:
Global warming is caused when co2 gases cause the earth to heat up and cause the environment to change
Answer:The answer would be C
Explanation:
Got it right on Edge. Please mark me brainleast
what is a Harmful mutation
Answers
By the same token, any random change in a gene's DNA is likely to result in a protein that does not function normally or may not function at all. Such mutations are likely to be harmful. Harmful mutations may cause genetic disorders or cancer. ... Cancer genes can be inherited
If the half-life of a 2.0 gram sample of a radionuclide is 15 hours, then the half-life of a 1.0 gram sample of the same radionuclide would be
Answers
7.5 hours or 450 minutes. 15/2=7.5
For the 1.0 gram sample of the same radionuclide, the required half life will be of 7.5 hours.
Given data:
The amount of sample at initial is, a = 2.0 g.
The half-life for 2.0 g sample is, [tex]t_{1/2}=15 \;\rm hr[/tex].
In the given problem, it is a simple calculation but the concept of half life is used . The half life is defined as the a time interval required for one-half of nucleus of sample to undergo complete decay.
In the given problem,
2.0 g of sample = 15 hours
1.0 g of sample = 15/2 hours
= 7.5 hours
Thus, we can conclude that for the 1.0 gram sample of the same radionuclide, the required half life will be of 7.5 hours.
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how could we develop space travel?
Answers
Suspended Animation, Fission-Fusion Propulsion, 2-D Space Landers, Solar System CubeSats
Caregivers should begin reading to children:
When they are babies.
When they can talk.
When they show an interest.
When they are two.
When they are preschoolers.
Answers
Answer:
When they are babies. to get them familar with it
Explanation:
Pls choose brainliest.
Answer:
When they are babies
Explanation:
Because they could hear the words and laern them.
. A car going 50 m/s accelerates to pass a truck. Five seconds later the car is going 80m/s. Calculate the acceleration of the car.
Answers
6 mph/s
Calculating acceleration involves dividing velocity by time — or in terms of SI units, dividing the meter per second [m/s] by the second [s]. Dividing distance by time twice is the same as dividing distance by the square of time. Thus the SI unit of acceleration is the meter per second squared .
A force of 16 N to the west is applied to each object below. Which object will
undergo the greatest change in momentum?
A. A 41 kg object that is moving east at 5 m/s
B. A 41 kg object that is moving east at 10 m/s
C. A 44 kg object that is moving east at 10 m/s
D. A 44 kg object that is moving east at 5 m/s
Answers
41kg object that is moving east at 5 m s
Answer:
41kg object that is moving east at 5 m s
Explanation:
SUPER EASY!!!! WILL GIVE BRAINLIEST
How does a barometer work in measuring air pressure?
a.) A barometer has mercury in a dish. Air pressure pushes down on the mercury and forces it up into a glass tube. Thus, the higher the mercury rises in the tube, the higher the air pressure.
b.) A barometer contains fluid that expands or contracts based on the pressure. At a higher pressure, the fluid expands and rises in the tube.
c.) Barometers measure temperature, not pressure.
d.) A barometer contains a fluid that expands or contracts based on the pressure. At a higher pressure, the fluid contracts and lowers in the tube.
Answers
Answer:
A
Explanation:
don't mind that other guy... that was so rude the answer's A
you must be panicking lol last day of school today!
Answer:
a.) A barometer has mercury in a dish. Air pressure pushes down on the mercury and forces it up into a glass tube. Thus, the higher the mercury rises in the tube, the higher the air pressure.
Explanation
i have it on my test
What sport was inspired by basketball adapted for older adults who were still interested in being physically active
Answers
I think it’s volleyball
Answer:
shes right, I just took the test
A supertanker ( = 1.70 × 108 kg) is moving with a constant velocity. Its engines generate a forward thrust of 7.40 × 105 N. Determine (a) the magnitude of the resistive force exerted on the tanker by the water and (b) the magnitude of the upward buoyant force exerted on the tanker by the water.
I need work shown thank u
Answers
Answer:
(a) 0 (b) [tex]F=1.67\times 10^9\ N[/tex]
Explanation:
Given that,
Mass of a supertanker, [tex]m=1.7\times 10^8\ kg[/tex]
The engine of a generate a forward thrust of, [tex]F=7.4\times 10^5\ N[/tex]
(a) As the supertanker is moving with a constant velocity. We need to find the magnitude of the resistive force exerted on the tanker by the water. It is given by :
F = ma, a is the acceleration
For constant velocity, a = 0
So, F = 0
(b) The magnitude of the upward buoyant force exerted on the tanker by the water is equal to the weight of the ship.
F = mg
[tex]F=1.7\times 10^8\times 9.8\\\\F=1.67\times 10^9\ N[/tex]
Hence, this is the required solution.
If a girl runs 51 m East in 17 seconds what is her velocity?
Answers
Answer:
Yea what he said I think
Explanation:
simplify log√8÷log√8
Answers
Answer:
The answer is 1.
Explanation:
Come up with your own team sports game and make your own rules and regulation.
Answers
SO my sports name would be called " Basvollball" It's where you have to hit in a volleyball into a basketball hoop, of course, the time is the same as football with increments of 5 minutes for junior high and 7 minutes for high school with halftime. Also, the ball can never touch the ground and if the ball ever hits the floor its the other's team ball. To decide which team gets the ball, a coin flip will decide it. For the point system, it depends on how far the ball is hit from so it's like basketball from 3 pointers to 2 points inside the line. If the team ever reaches 30 points without the other team scoring, the team who's winning will automatically win after the time runs out in that period or quarter. You can use every body part, as long as, the ball doesn't touch the floor, and you can only use your body to push someone, no pushing with hands or arms. You can play this sport indoors or outside whether the team has a field available. There's also a maximum of 14 players on the field, so 7 players on each team.
Determine the acceleration of a boat with a final speed of 120 m/s after 30 seconds.
Answers
V=u+at
120=0+a*30
120=30a
a=120/30
a=4 m/s²
Answer:
ehehehshehehehhehesh
Explanation:
ehehehehheheheeheh
Can someone define 'work' for me please? I looked it up but there are a lot of different answers.
Answers
Answer:
Work- Activity involving mental or physical effort done in order to achieve a purpose or result.
Explanation:
This was the first definition from the dictionary on google :)
be engaged in physical or mental activity in order to achieve a result; do work. a task or tasks to be undertaken; something a person or thing has to do.
Which option is an example of a magnet being used to store information?
A. The magnet on a strip used to store tools
B. The magnetic strip on a credit card
C. The needle on a compass
D. The clasp on a necklace
Answers
Answer:
B
Explanation:
The magnet strip on a credit card is an example of a magnet which is being used to store information. Thus, the correct option is B.
How does magnet used to store information?
Magnetic storage or magnetic recording is the storage of data on a magnetized medium or a magnet. Magnetic storage uses different patterns of magnetization in a magnetizable material to store the data and is a form of the non-volatile memory source. The information in the magnet is accessed using one or more read or write heads and files.
Some examples of magnetic storage media include the floppy disks, magnetic tape, and magnetic stripes that are present on the credit cards.
Therefore, the correct option is B.
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