Answer:
Em₀ = 245 J
Explanation:
We can solve this problem with the concepts of energy conservation, we assume that there is no friction with the air.
Initial energy the highest point
Em₀ = U
Em₀ = m g h
The height can be found with trigonometry
The length of the pendulum is L and the length for the angle of 60 ° is L ’, therefore the height from the lowest point is
h = L - L’
cos θ = L ’/ L
L ’= L cos θ
h = L (1 - cos θ)
We replace
Em₀ = m g L (1- cos θ)
Let's calculate
Em₀ = 10 9.8 5.0 (1 - cos 60)
Em₀ = 245 J
<span>1. It will stay at rest due to inertia.
2. acceleration
3. The couch will move to the left with a force of 1 N.
5. 6 N
6. Friction pulls the skates' wheels westward.
7. velocity
8. its speed increases due to gravity
10. It will have a constant velocity until acted upon by outside forces.
11. 35 N
12. mass
13. sliding friction
14. The couch will move with a force of 6 N.
15. It is pushing up on the book.
16. gravity
18. There is less friction between the car tires and the ice than between the car tires and the road.
20. balanced.
21. Due to centripetal force, the water is pushing on the bottom of the bucket.
22. a high velocity and a large mass
23. Scientists in other countries use SI units when measuring speed</span>
A heat engine <em>is </em>a device that uses to produce useful work.
Definition - a device for producing motive power from heat, such as a gasoline engine or steam engine.
So..
If this is a true or false question.. Your answer is:
TRUE
Hope this helps!
- Kylie
What's with these goofy questions? There's no practical electronics that's doing anything with a minuscule current of .16 microamps through a dead short of 3.4 milliohms.
Anyway,
V = IR = .16 × 10⁻⁶ × 3.4 × 10⁻³ = 5.4 × 10⁻¹⁰
Answer: 5.4 × 10⁻¹⁰ volts
Finally a use for dead batteries.
