If john is traveling at 8 feet per minute east for 2 hours what is his displacement
Answers
Hello!
The answer is: 960 East feet.
Why?
We need to apply the following formula:
and
So, by substituting we have:
Have a nice day!
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Label the samples based on their pH levels
A) equal
B) half as much
C) twice as much
D) four times as much
Answers
Answer: C
Explanation:
Calculate EkA -kinetic energy of car A
m=1000kg
Va=16.66 m/s
EkA=m*Va²/2
Eka=(1000kg*277.556m²/s²)/2
Eka=138 777.8 J
Calculate kinetic energy of CarB:
m=2000 kg
Vb=8.33 m/s
Ekb=(m*Vb²)/2
Ekb=(2000kg*69.39m²/s²)/2
Ekb=69 388.9 J
compare Eka with EkB
Eka/Ekb=138 777.8 J/69 388.9
Eka/Ekb=2
Final answer:
The kinetic energy of car A is twice as much as that of car B. This is calculated using the formula for kinetic energy, which is 1/2 * mass * (velocity)^2.
Explanation:
To compare the kinetic energy of car A with that of car B, we first need to understand the mathematical formula for kinetic energy, which is 1/2 * mass * (velocity)^2.
Let's calculate for each car:
- For car A: kinetic energy = 1/2 * 1000 kg * (60 km/hr)^2 = 1800000 Joules
- For car B: kinetic energy = 1/2 * 2000 kg * (30 km/hr)^2 = 900000 Joules
Therefore, car A has twice as much kinetic energy as car B.
Learn more about Kinetic Energy here:
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Answers
Hope this helps!
and (its velocity). So, if you want to decrease the object's
momentum, then you're going to have to decrease one of
those quantities.
You have exactly two choices:
1). Reduce its mass. (Put the object on a diet, or cut a piece off.)
or
2). Reduce its speed.
2)the needle of compass line up with earth magnetic field and point to_________
a)earth poles b)earth equator
3)magnetic field lines that curve toward each other show_________
a)repulsion b)attraction
4)some animals have tiny pieces of ___________in their brains to help them find their way
a)magnetite b)magnetosphere
5)a magnet contain a large number of magnetic _____that are lined up and pointed in the same direction.
a)domains b)poles
Answers
Answer:
1 . a) the poles
2. a) earth poles.
3. b) attraction.
4. a) magnetite.
5. a) domains.
Explanation:
The magnetic field is strongest at the poles and very weak at the center of the magnet.
The magnetic compass will always align along the north - south poles of the earth. North of the compass needle is attracted towards the magnetic south pole of the earth.
Magnetic Field lines begin at the north pole of the magnet and end at the south pole. Unlike poles attract and like poles repel , so they curve for unlike poles.
Magnetite is a magnetic mineral, which is present in the animal brains , enabling them to identify correct directions.
Magnetic domains are regions where individual magnetic moments of the atoms are aligned in a definite direction.
2. Again its A. because the compass needle is attracted to " north " which is magnetic south. It does this because opposites attract.
3. This one would be B. Because if the magnets were being repelled the magnetic field lines would look like there was a line that the field hit and bounced off of it.
4. This answer is A. the magnetite helps them migrate so they know which way is north and which way is south.
5. This answer is A. Because without the domains there wouldn't be poles on the magnetic object.
Answers
So the cart would have greater acceleration to the right, and
it would reach a greater speed to the right. The resulting
'v' vs 't' graph would have a greater positive slope, and would
be higher at any given time.
You might get a better answer if you let us actually SEE the
picture and the graph.
The resulting
'v' vs 't' graph would have a greater positive slope, and would
be higher at any given time.
Answers