Answer:
B
Explanation:
One positive charger and one negative charger
The value of the final speed depends on the mass of the ore.
Let's call m the mass of the ore. We can solve the exercise by requiring the conservation of momentum, which must be the same before and after the ore is loaded.
Initially, there is only the cart, so the momentum is
After the ore is loaded, the new mass will be (1200 kg+m), and the new speed is
. The momentum p is conserved, so it is still 12960 kg m/s. Therefore, we have
and so the final speed is
The diver most likely refers to the ocean's surface when describing the squid's location. Option A is correct.
<h3>What is the height?</h3>
The vertical distance between the object's top and the bottom is defined as height. It is measured in centimeters, inches, meters, and other units.
The organism is shown as;
Seaweed = - 20 meters
Clownfish = - 23 meters
Squid = - 44 meters.
The given data is a reference from the surface of the ocean. The negative sign in the data shows that the given height is below the ocean surface.
The diver most likely uses the ocean surface as a reference point to describe the position of the squid.
Hence, option A is correct.
To learn more about the height, refer to the link;
brainly.com/question/10726356
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Velocity =displacement
Change in time
D=72km/hr
Time=20s
But the S.I unit of velocity is m/s so you woul have to change 72km/hr to m/s
Changing 72km to m
1 kilometer=1000meters
Then, 72 kilometers =?
72•1000/1
=72000m
Changing 72hours to seconds
If 1 hour = 3600 seconds
Then 72 hours=?
72•3600/1
=259200 seconds
Velocity =displacement
Change in time
V= 72,000
259,2005
=0.028m/s
Answer:
lithium
Explanation:
A lithium atom contains 3 protons in its nucleus irrespective of the number of neutrons or electrons. Notice that because the lithium atom always has 3 protons, the atomic number for lithium is always 3. The mass number, however, is 6 in the isotope with 3 neutrons, and 7 in the isotope with 4 neutrons.
