Answer: if this makes sense dx/dt = -1500 ft/sec
Explanation: The shadow is moving at a speed 1500 ft/sec towards
the point immediately below the ball. The high speed is to be expected
since initially the shadow is at infinity and has to move to the end
point in 1.76 seconds.
<span>A(n) alpha particle is a particle that contains two protons, two neutrons, and has a 2 charge.
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b. alpha
Answer:
Explanation:
When an electric charge is immersed in an electric field, it experiences a force given by the equation
where
q is the charge
E is the magnitude of the electric field
In this problem, we have:
is the charge on the small piece of lint
is the force experienced by the charge
Therefore, we can find the magnitude of the electric field by re-arranging the equation and solving for E:
It depends a lot of the material of the bucket, the weight of the apples etc.
Hope it helps!
Answer:
The experiments are not shown, so I will answer in a general way.
By the first Newton's law, an object will only change it's velocity if there is a net force different than zero acting on the object.
Then in the experiments (depending on the experiment), you can see different things.
If an object is not moving and you apply a force in it, the object will move.
If an object is moving and you apply a force in the opposite direction of it's motion, the motion will: decrease the speed, stop at all, or move in the opposite direction. Depending on the force that you apply.
An excellent experiment (but hard to do) is dropping an object from a really high place.
The gravitational force will pull down the object and the object will start to increase it's velocity.
But there is the air resistance, that opposes to this motion and increases with the speed of the object.
Then there is a given speed such that the air resistance force will be equal to the gravitational force, then we have a balanced force (the net force is zero) which means that the object will keep falling at a constant velocity.