Answer:
it's either a b c or do I swear
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.
PLEASE help with this!!! i'll give brainliest if right!!
Identify the steps in the Scientific Method and describe each step.
Identify the steps in the Scientific Method and describe each step.
Compare and contrast intensive and extensive physical properties, and give 3 examples of each.
Describe the relationship between volume, mass and density. If a marble with a density of 2.4 g/cm3 was cut in half, what would be the density of half the marble?
Identify two objects at your desk, and describe each using at least 5 physical properties of matter that were discussed in this module.
Answer:
here are the steps in the scientific method
Explanation:
Observation/ Question
(topic for research and experimentation or question that needs to be answered)
Research
(find out about the topic )
Hypothesis
(predict the outcome to the problem )
Experiment
(Develop a procedure to test the hypothesis )
Collect data
(record results of the experiment)
Analysis
(examine the data )
Conclusion
(compare the hypothesis to the experiment results )
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
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:
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:
If lightning is caused by electricity in the air during a thunderstorm, what causes thunder?
Answer:
Since light travels faster than sound, the lightning arrives before the thunder. But thunder is the sound of lightning shooting through the sky in a thunderstorm.
Explanation:
