A change that occurs when a solid melts or a liquid freezes is an example of a phase change.a. True
b. False
Answers
Answer:
True
Explanation:
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Explain why the car reaches a top speed even though the thrust Force remains constant at 3500N
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Answers
it turns out that every object you drop falls from your hand to the ground
with the same acceleration, and hits the ground with the same speed,
no matter whether the object is light, heavy, or anything in between.
That particular value of acceleration is the "acceleration due to gravity".
On Earth, it's 9.81 meters per second². On the moon, it's 1.62 meters
per second². On Jupiter, it's 25.89 meters per second².
Why we don't generally notice it: The previous description is true if the
ONLY force on the object is the force of gravity. If it has to fall through
air on the way down, then the air can have a great effect on it. Many
museums have an exhibit where they drop things in a long tube with
all the air removed from it, and there you can see some pretty weird
stuff ... like a bowling ball, a rock, a sheet of paper, and a feather, all
falling together, with nothing fluttering.
Why everything falls with the same acceleration ? That's a separate question.
Answers
Answers
The exchange particles you are talking about are probably the gauge bosons. They are elementary bosons, meaning that they are elementary particles making part of the standard model and they have integer spin. There are four of them: The photon, the gluon, the W+ and W- bosons and the Z boson. The photon basically is the particle of light being an excitation, if you will, of the electromagnetic field so that is mediates the electromagnetic force. The only thing that differs from long range photons (light) is that they are what is called virtual photons but that is for another subject. Then you have the gluons that come in 8 varieties and their role is to interchange the color charge in between quarks so that it mediates the strong nuclear force, the force that keeps quarks bounded into protons. And then finally there are the W+, W- and Z bosons that mediates this time, the weak nulear force, the force that allows protons to coexist in the nucleus of atoms with neutrons. I hope that helped you, but as i usually do, i tried to simplify my answer beacause i could have written a lot mor about that!
Answers
= 0.5 * 8 * (14.3)^2
KE = 817.96 joule
B. 0.8
C. 2.5
D. 3.2
Answers
Answer:
correct option is A
20 km we need 0.3 gallon fuel
Explanation:
given data
gallon = 40 miles
distance = 20 km
to find out
how many gallons of fuel
solution
we know that 20 km = 12.4274 miles
and
we know here car is travel 40 miles per gallon
it mean here that
40 miles = 1 gallon
1 miles = 1/ 40 gallon
and
12.4274 miles = 1/40 × 12.4274 gallon
solve it to get gallon of 20 km or
12.4274 miles = 0.31 gallon
so in 20 km we need 0.3 gallon fuel
correct option is A
Answer:
The number of gallons are 0.3.
A is correct option.
Explanation:
Given that,
A hybrid car can travel 40 miles per gallon
We need to calculate the mile/gallon to km/gallon
Gallon is the unit of liquid and miles and kilometer are the unit of distance.
We need to calculate the number of gallons of fuel
Number of gallon
Hence, The number of gallons are 0.3.