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Natasha2012 [34]
3 years ago
11

Debbie plotted a graph to show how the mass of aluminium rivets affected the distance the cup moved down.

Physics
1 answer:
Elan Coil [88]3 years ago
4 0

Answer:

26

Explanation:

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Which if, any, of these statements are true? (More than one may be true.) Assume the batteries are ideal. Check all that apply.
Maurinko [17]

Answer:

All are true except the last point that says that a battery is a current source and the current at the outlet is always the same.

Explanation:

  • A battery is an electro-chemical device which converts the chemical energy into usable electrical energy thus it provides electrical energy.
  • Since, the battery maintains a a constant potential difference between its terminals, once connected.
  • Since, the movement of electric current requires energy, which is supplied by the electric potential energy stored in the battery.
  • The current in the battery flows as per the Ohm's law and we can not say that the current leaving will always remain constant.
  • As the current is the flow of electric charge, and charges are not stored in batteries unlike capacitors, thus the current at the leaving end will depend on Ohm's law and will vary accordingly.

3 0
2 years ago
The motion of an object undergoing constant acceleration can be modeled by the kinematic equations. One such equation is xf=xi+v
Mademuasel [1]

Answer:

a = -04978 m / s²

Explanation:

For this exercise we can use the kinematics equations, as the initial speed, distance and time indicate, we can use

        x = x₀ + v₀ t + 1 /2 a  t²

       ½ a t² = x-x₀ - v₀ t

       a = (x-x₀ - v₀ t) 2 / t²

let's reduce the magnitudes to the SI system

     x₀ = 1000 mm = 1 m

     x  = 5000mm = 5m

let's calculate

     a = (5 - 1 - 15 60) 2/60²

     a = -04978 m / s²

negative sign indicates that braking is related

7 0
2 years ago
A ball took 0.45s to hit the ground 0.72m from the table. What was the horizontal velocity of the ball as it rolled off the tabl
dusya [7]

the ball hits the ground a very high velocity


8 0
3 years ago
a moving electron accelerates at 5200m/s^2 in a 55.0 direction. After 0.350as,it has a velocity of 6598m/s in a -20.5 direction.
Lady bird [3.3K]

Answer:

  -3802 m/s

Explanation:

The y-component of the final velocity is ...

  (6598 m/s)·sin(-20.5°) ≈ -2310.7 m/s

The y-component of the velocity due to acceleration is ...

  (5200 m/s²)(0.350 s)sin(55°) ≈ 1490.9 m/s

Then the initial velocity in the y-direction is found from ...

  initial velocity + change in velocity = final velocity

  initial velocity = (final velocity) - (change in velocity)

  = -2310.7 m/s - 1490.9 m/s ≈ -3802 m/s

6 0
3 years ago
In an elastic collision, both the momentum and the kinetic energy of the system are conserved. Identify which scenario describes
Shkiper50 [21]

Answer:

The answer is c. Two billiards balls strike each other and bounce off moving in different directions

Hope this helps

5 0
2 years ago
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