a jet airliner flies 4,100 km from New York City to San Francisco in 4.25 h. What is its average speed?
Answers
Speed is the ratio of distance and time.
It shows how fast an object is moving at a given time.
The averagespeed of the jet airlines is 965 km per hour
What is speed?
Speed is the ratio of distance and time.
It shows how fast an object is moving at a given time.
We have,
A jet airliner flies 4,100 km from New York City to San Francisco in 4.25 h.
This can be written as,
Distance = 4,100 km
Time = 4.25 hours
The averagespeed.
= Distance / Time
= 4,100 / 4.25
= 965 km per hour
Thus,
The averagespeed of the jet airlines is 965 km per hour
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the average speed is 964.7 because you divide the numbers o get the quotient of 964.7. therefore, his average speed is 964.7.
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A baseball player reaches base 35% of the time. How many times can he expect to reach base in 850 at-base?
Answers
Given:
Quadrilateral PQRS is a rhombus.
To find:
The value of y.
Solution:
In the rhombus PQRS,
PS = 10y and SR = y + 45
Property of rhombus:
All sides are congruent.
⇒ PS = SR
⇒ 10y = y + 45
Subtract y from both sides.
⇒ 10y - y = y + 45 - y
⇒ 9y = 45
Divide by 9 on both sides.
⇒ y = 5
The value of y is 5.
Answers
Answer:
when a star gets big it pops and might make a black hole
Because no light can escape, black holes are invisible. However, space telescopes with special instruments can help find black holes. They can observe the behavior of material and stars that are very close to black holes.
How Big Are Black Holes?
Black holes can come in a range of sizes, but there are three main types of black holes. The black hole's mass and size determine what kind it is.
The smallest ones are known as primordial black holes. Scientists believe this type of black hole is as small as a single atom but with the mass of a large mountain.
The most common type of medium-sized black holes is called "stellar." The mass of a stellar black hole can be up to 20 times greater than the mass of the sun and can fit inside a ball with a diameter of about 10 miles. Dozens of stellar mass black holes may exist within the Milky Way galaxy.
The largest black holes are called "supermassive." These black holes have masses greater than 1 million suns combined and would fit inside a ball with a diameter about the size of the solar system. Scientific evidence suggests that every large galaxy contains a supermassive black hole at its center. The supermassive black hole at the center of the Milky Way galaxy is called Sagittarius A. It has a mass equal to about 4 million suns and would fit inside a ball with a diameter about the size of the sun.
How Do Black Holes Form?
Primordial black holes are thought to have formed in the early universe, soon after the big bang.
Stellar black holes form when the center of a very massive star collapses in upon itself. This collapse also causes a supernova, or an exploding star, that blasts part of the star into space.
Scientists think supermassive black holes formed at the same time as the galaxy they are in. The size of the supermassive black hole is related to the size and mass of the galaxy it is in.
If Black Holes Are "Black," How Do Scientists Know They Are There?
A black hole can not be seen because of the strong gravity that is pulling all of the light into the black hole's center. However, scientists can see the effects of its strong gravity on the stars and gases around it. If a star is orbiting a certain point in space, scientists can study the star's motion to find out if it is orbiting a black hole.
When a black hole and a star are orbiting close together, high-energy light is produced. Scientific instruments can see this high-energy light.
A black hole's gravity can sometimes be strong enough to pull off the outer gases of the star and grow a disk around itself called the accretion disk. As gas from the accretion disk spirals into the black hole, the gas heats to very high temperatures and releases X-ray light in all directions. NASA telescopes measure the X-ray light. Astronomers use this information to learn more about the properties of a black hole.
Could a Black Hole Destroy Earth?
Black holes do not wander around the universe, randomly swallowing worlds. They follow the laws of gravity just like other objects in space. The orbit of a black hole would have to be very close to the solar system to affect Earth, which is not likely.
If a black hole with the same mass as the sun were to replace the sun, Earth would not fall in. The black hole with the same mass as the sun would keep the same gravity as the sun. The planets would still orbit the black hole as they orbit the sun now.
Will the Sun Ever Turn Into a Black Hole?
The sun does not have enough mass to collapse into a black hole. In billions of years, when the sun is at the end of its life, it will become a red giant star. Then, when it has used the last of its fuel, it will throw off its outer layers and turn into a glowing ring of gas called a planetary nebula. Finally, all that will be left of the sun is a cooling white dwarf star.
Hope I can help you!
Answers
Patrick ate on Friday 3/5 so 5/5-3/5=2/5
On Saturday P. ate 1/2 of 2/5 so = 1/2*2/5= 2/10=1/5
So deduct 1/5 from 2/5 and we have 1/5 left
Final answer:
Patrick ate 1/5 of the pizza for lunch on Saturday. To find this, we first calculated how much pizza was left over after he initially ate 3/5 of it, which was 2/5. Then, knowing he ate half of the leftover pizza, we multiplied 2/5 by 1/2 to get 1/5.
Explanation:
The subject of this question is fractions. In this problem, we want to find out how much of the leftover pizza Patrick had for lunch on Saturday. Initially, Patrick ate 3/5 of the pizza, which means 2/5 of the pizza was left over. Then, he ate 1/2 of that remaining pizza for lunch on Saturday.
To find how much pizza he actually ate, we need to multiply the fractions. That is, 2/5 (leftover pizza) * 1/2 (Patrick's lunch). When you multiply these two fractions, you get 2/10 or 1/5. Therefore, Patrick ate 1/5 of the pizza for lunch on Saturday.
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1,280x^11 - 405x^7
Answers
Answer:
Step-by-step explanation:
we have
we know that
substitute
Factor 5x^7
Applying difference of square
substitute
Answer:
5x^7(4x-a 3)(4x+3)(16x^2+9)
Step-by-step explanation:
Answers
112 * 45 = 5,040
143 * 32 = 4,576
5,040 + 4,576 = 9,616
If the store sells all the ponchos it will receive $9,616