Answer:
Block A has the greatest density.
Explaination:
Block A density:0.0625 kg/cm3
Block B density:0.020833 kg/cm3
Block C density:0.041667 kg/cm3
Do you think a moving skateboard has energy? Why or Why not? What about a skateboard that is not moving?
Mahiya and Mrinmoy are in a relay around a square field with each side of length 60m. First, Mahiya runs at a speed of 6 ms−1 for 60m to pass a baton to Mrinmoy. Then Mrinmoy runs 120m at 4ms−1 while Mahiya runs through the field to reach the other corner. Then Mrinmoy passes the baton. But Mahiya is now tired since she has been constantly running. So, she only runs at 3ms−1 for the final 60m. What is the average speed of the baton in ms−1?
The average speed of the baton can be determined by dividing the total distance travelled by the total time taken for that travelling.
[tex]Average\ Time = \frac{Total\ Distance}{Total\ Time}[/tex]
First, we will find the total distance, by adding the distances travelled by both Mahiya and Mrinmoy, while carrying the baton.
[tex]Total\ Distance = Distance\ Travelled\ by\ Mahiya\ to\ pass\ the\ baton\ to\ Mrinmoy\ +\ Distance\ Travelled\ by\ Mrinmoy\ to\ pass\ the\ baton\ to\ Mahiya\ +\ Final\ Distance\ Travelled\ by\\ Mahiya[/tex]Total Distance = 60 m + 120 m + 60 m = 240 m
Now, we will find the total time taken for this travelling. To find out the total time we will divide each distance travelled by the speed of the traveller during that distance:
[tex]Total\ Time = \frac{60\ m}{6\ m/s}+\frac{120\ m}{4\ m/s}+\frac{60\ m}{3\ m/s}\\\\Total\ Time = 10\ s\ +\ 30\ s\ +\ 20\ s[/tex]
Total Time = 60 s
Now, we finally find the average speed of the baton by using the formula:
[tex]Average\ Time = \frac{Total\ Distance}{Total\ Time}\\\\Average\ Time = \frac{240\ m}{60\ s}[/tex]
Average Speed = 4 ms⁻¹
Learn more about average speed here:
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is yogurt a liquid or a solid.
All of these are very important parts of studying physics EXCEPT
1. describing the organization of the universe
2. understanding natural laws
3. memorizing complicated explanations
4. deducing and applying natural laws
Answer:
4. deducing and applying natural laws
PLEASE help with this!!! i'll give brainliest if right!!
Why is it possible for railway tracks to buckle even though there are gaps in them?
These gaps which are of the order of a few millimeters, are provided to allow room for the rails to expand the rise in temperature due to the atmospheric temperature as well as the friction caused by running of train. All materials expand when heated and contract when cooled. The extent of expansion and contraction is quite low to be noticed by people or make much difference in most situations. However, since each section of the rail is very long, the expansion due to heating is significant, and unless space is provided for expansion of rails, the rails will bend to accommodate the increased length. This will make the railway unfit for running of trains.
Answer: the tracks will buckle under the force.
Explanation: Heat-related expansion places a lot of stress on the ties, ballasts, and rail anchors that keep the tracks fixed to the ground.
give me this same text but if it was a 7th grader
Mount Rushmore is an impressive sculpture. Each year, millions of people visit the 60-foot-tall images of American presidents George Washington, Thomas Jefferson, Abraham Lincoln, and Theodore Roosevelt carved into the Black Hills of South Dakota. Mount Rushmore is not without controversy. It was built on land sacred to the Native Americans. In addition, the Sioux were forced off the land after a series of battles.
please dont say "this sounds like a 7th grader so its fine". this is in the assignment so yeah.
Answer:
Mount Rushmore is a very well built sculpture. It is visited by millions of people each year to see 60-foot tall images of the American presidents; George Washington, Thomas Jefferson, Abraham Lincoln and Theodore Rosevelt which are carved into the Black Hills of South Dakota. Mount Rushmore has faced many controversies too. The land it was built on is sacred to Native Americans. The Sioux were also forced to leave the land, after lots of battles
Explanation:
Identify two objects at your desk, and describe each using at least 5 physical properties of matter that were discussed in this module.
Answer:
the pencil i have on my desk is hard
Explanation:
i dont have 5 but here is one
is kinetic energy the same as energy? or is it a type of energy?
Answer:
It is a type of energy
Explanation:
We have majorly two type of energy which is the kinetic energy and the potential energy.
A bus has velocity of 20 m/s towards east and another bus has velocity of 15 m/s in west direction . if they start to move from a point simultaneously, what distance do they cover in 2 minutes ? what will be their seperation ?
Help plss!!
Answer:
3.8 km
Explanation:
Eastern Side Bus
Velocity = 20m/s
Covers distance in 2 min (120sec) = 20×120 = 2400m = 2 km
Western Side Bus
Velocity = 15m/s
Covers distance in 2 min (120sec) = 15×120 = 1800m = 1.8 km
Separation Distance = 2+1.8 = 3.8 km
The Northern Hemisphere is experiencing the summer season. Where is most of the direct sunlight located on Earth at that time?
A. on the equator
B. on the southern hemipshere
C. on the northen hemipshere
D. on both hemispheres
Answer:
C
Explanation:
..............................
The Northern Hemisphere is experiencing the summer season, then most of the direct sunlight located on Earth at that time would be on the northern hemisphere, therefore the correct answer is option C.
What is the equator?The Equator is an imaginary line passing through the middle of a globe. It is equidistant from the North Pole and the South Pole, Its is a horizontal line residing at 0 degrees latitude.
The seasons vary according to the relative position of the sun and the earth, for example, if there is a summer season in the northern hemisphere then most mount of the sunlight would fall on the northern hemisphere as per the relative position of the sun and the earth.
Thus, the correct answer is option C.
Learn more about the equator from here, refer to the link;
brainly.com/question/24203207
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Compare and contrast intensive and extensive physical properties, and give 3 examples of each.
Answer:
Intensive properties do not depend on the quantity of matter. Examples include density, state of matter, and temperature. Extensive properties do depend on sample size. Examples include volume, mass, and size.Intensive properties do not depend on the quantity of matter. Examples include density, state of matter, and temperature. Extensive properties do depend on sample size. Examples include volume, mass, and size.
Explanation:
look at screenshot and please answer as quick as possible
Answer:
Huh?
Explanation:
WILL MARK BRAINLIEST IF CORRECT ANSWERS - Is the reaction below a balanced chemical reaction? How do you know?
KBr + 30↓2 → KBr0↓3
What is the type of chemical reaction in this equation? (Same equation above)
Answer:
synthesis
Explanation:
What is one example of a scientific model?
Answer:
A scientific model represents objects, phenomena, and physical processes in a consistent and logical way.
Answer:
Models that clarify climate wonders can be utilized to anticipate climate.
Explanation:
In a simple machine, what does it mean :
i) If efficiency is said to be 65%.
If a man bought 1000N of potatoes in Russia and sold it in Africa for the same price, will he be in profit or loss? Explain your answer with proper reason neglate the transportation cost
Answer:
profit because if the man sold them to africa hw must pay for it to send them to africa so it will voat him more.
Answer:
Explanation:
if they are selling potatoes based on its weight, then it depends on the acceleration due to gravity(g) in the region
If g in africa > russia, then he will make a profit, since weight will be more,
if its < russia, then he will make a loss, i dont know thier actual values so you will have to find that out on your own
PLEASE HELP!!!!!!
Describe how the Rube Goldberg device design that you created follows the law of conservation of energy. Be sure to include both parts of the law of conservation of energy in your description.
