The correct answer is D. Atoms of the same element can have different number of neutrons.
Answer:
09m
Explanation:
yes the current flow in clockwise direction
Answer: Total work done on the block is 3670.5 Joules.
Step by step:
Work done:
With F the force, d the displacement, and theta the angle of action (which is 0 since the block is pushed along the direction of displacement, and cos 0 = 1)
Given:
F = 75 N
m = 31.8 kg
Final velocity
In order to calculate the Work we need to determine the displacement, or distance the block travels. We can use the information about F and m to first figure out the acceleration:
Now we can determine the displacement from the following formula:
Here, the initial displacement is 0 and initial velocity is also 0 (at rest):
Now we still have "t" as unknown. But we are given one more bit of information from which this can be determined:
(using vf as final velocity, and tf as final time)
So it takes about 6.44 seconds for the block to move. This allows us to finally calculate the displacement:
and the corresponding work:
Thrust given = 5.26N
Δmass = 12.7g
Δtime = 1.9seconds
exhaust speed = ve
The thrust acting on the rocket is = veΔm/ Δt
So, ve = thrust / (Δm/Δt) = 5.26 x 1.9/12.7 x
ve = 707 m/s
<h3>What is Thrust?</h3>
- Newton's third law uses the concept of thrust to quantitatively quantify a reaction force. A force of similar size and in the opposite direction will be applied to a system when mass is expended or accelerated in one direction.
- Thrust is another name for the force that is exerted to a surface normal to or perpendicular to it.
- The amount required to propel 1 kilogramme of mass at a velocity of 1 metre per second per second is measured as force, and hence thrust, using the International System of Units (SI) in newtons (symbol: N).
To learn more about Thrust, refer to:
brainly.com/question/20110602
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Answer:
3/4.no because there going in diffrent directions
Explanation: