20 points! i need help with some practice homework. its 9th grade science?

20 points! i need help with some practice homework. its 9th grade science? Topic: 20 points! i need help with some practice homework. its 9th grade science?
May 24, 2019 / By Norah
Question: i have to be able to teach it to my 14 year old sister. 4. For normal situations, the minimum speed limit throughout the U.S. interstate highway system is 45 mi/h, or 72 km/h. How far, in kilometers, will a car travel if it is moving continously at this speed for 3.3 hours? --------------------------------------... 5. The various types of tree sloths share the honor of being the slowest- moving mammals. An average tree sloth moves with a speed of 0.743 m/s. How long does it take a sloth moving at this speed to travel 22.30 m? --------------------------------------... 6. The longest stretch of straight railroad tracks lies across the desolate Nullarbor Plain, between the Australian cities of Adelaide and Perth. The tracks extend a distance of 478 km without a curve. How long would it take a train moving at a constant speed of 97 km/h to travel this length of track? --------------------------------------... 7. The fastest supersonic passenger jet is the Concorde. How long would it take the Concorde to travel the 6,265 km between New York City and London, England, assuming that the jet travels at its maximum speed of 2150 km/h during the entire trip?
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Best Answers: 20 points! i need help with some practice homework. its 9th grade science?

Mabella Mabella | 2 days ago
4. For normal situations, the minimum speed limit throughout the U.S. interstate highway system is 45 mi/h, or 72 km/h. How far, in kilometers, will a car travel if it is moving continuously at this speed for 3.3 hours? 72 *3.3 = 237.6 --------------------------------------... 5. The various types of tree sloths share the honor of being the slowest- moving mammals. An average tree sloth moves with a speed of 0.743 m/s. How long does it take a sloth moving at this speed to travel 22.30 m? does m/s = meters /second? 22.3 / .0743= 300. 13459 300/60 - five hours --------------------------------------... 6. The longest stretch of straight railroad tracks lies across the desolate Nullarbor Plain, between the Australian cities of Adelaide and Perth. The tracks extend a distance of 478 km without a curve. How long would it take a train moving at a constant speed of 97 km/h to travel this length of track? 478 / 97 = = 4.92783505 Call it 5 fours. --------------------------------------... 7. The fastest supersonic passenger jet is the Concorde. How long would it take the Concorde to travel the 6,265 km between New York City and London, England, assuming that the jet travels at its maximum speed of 2150 km/h during the entire trip? I thought that they discontinued the Concorde. 6265 / 2150 = 2.91395349
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Mabella Originally Answered: 7th grade science homework help?
1. Viruses are not cells and do not have a cell membrane or other components of living cells. They cannot reproduce on their own. They cannot move on their own. They also can not use energy. They are alive in the sense that they are organic material, but not in the sense that they are independent living things. Also they cannot respond to stimulus. 2.Basic structure= Capsid (outer shells that house the nucleic acid), nucleic acid (the genetic material), neck, tail sheath, some internal proteins, tail fibers, end plate, and pins. 3. a virus injects its DNA into the host cell making it produce multiple copies of that DNA and multiple copies of the protein capsule of that virus. After a while, the host cell becomes full of many copies of that virus, then the host cell explodes releasing all the new viruses. This phenomena is done in two ways either by lytic cycle in which virus DNA survive and bacterial cell destroy, the second is lysogenic cycle in which virus multiply with host cell DNA. hope that helps , i googled it , saved you time :)
Mabella Originally Answered: 7th grade science homework help?
1. Viruses are not cells and do not have a cell membrane or other components of living cells. They cannot reproduce on their own. They cannot move on their own. They also can not use energy. They are alive in the sense that they are organic material, but not in the sense that they are independent living things. Also they cannot respond to stimulus. 2.A virus is a small parasite that cannot reproduce by itself. Once it infects a susceptible cell, however, a virus can direct the cell machinery to produce more viruses. Most viruses have either RNA or DNA as their genetic material. The nucleic acid may be single- or double-stranded. The entire infectious virus particle, called a virion, consists of the nucleic acid and an outer shell of protein. The simplest viruses contain only enough RNA or DNA to encode four proteins. 3.a virus injects its DNA into the host cell making it produce multiple copies of that DNA and multiple copies of the protein capsule of that virus. After a while, the host cell becomes full of many copies of that virus, then the host cell explodes releasing all the new viruses. This phenomena is done in two ways either by lytic cycle in which virus DNA survive and bacterial cell destroy, the second is lysogenic cycle in which virus multiply with host cell DNA.

Kelleigh Kelleigh
You can't give 20 pts. All of these equations can be solved with the simplified linear kinematics equation below. Happy solving. S*T = D S = speed (in units of length/time) T = time (make sure that the units are the same as in the speed, Ex: if speed is 123 mile/hour, time must be measured in hours before you multiply) D = distance (the units should be the same as the unit of length in speed)
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Irmalinda Irmalinda
1 you cant give people 20 points, only a max of 10 #2 ill bet you coulda finished these problems in the time it took you to type them out on here fool
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Irmalinda Originally Answered: Daughters 1st grade science homework question.?
1.All insects have: a. wings b.bones c.colorful body d. six legs it's D it is not A because ants are insects and most do not have wings no insects have bones, they only have an exoskeleton therefore B is wrong i don't believe an ant is "colorful" so not C. 2. which of these is a fact about ants? a. all ants have wings b. some ants have wings c. no ants have wings d. ants have wings but can not fly it's B. A is obviously not correct otherwise they won't be crawling on the floor. C. the new queen does have wings and will use them to fly to new area and start a new population therefore D is also wrong. How many body parts does an insect have? 3 head, thorax, abdomen How many legs does an insect have? 6 always 6. Draw two types of insects, one with wings. draw an ant and a fly. there ya go :) would take 15 mins really I think this seems like alot for a 1st grader.
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