What type of friction holds a penny on surface of book when lift cover?
static friction, friction between two non-moving objects.
I would think about 70% of them need to be correct
What are the three kinds of levers?
The three kinds of levers are the:
A) First-class lever - Like a seesaw, the fulcrum is in the middle. The input force is on one side and the output force comes out on the other side of the fulcrum.
B) Second-class lever - This one is like a wheelbarrow. The fulcrum is all the way at the end, and you PULL upon the other end so the middle (where the bucket is) gets lifted up also.
C) Third-class lever - The third class lever is like the second, but the input force is not at the end. The fulcrum is at one end, and on the other end is the output force. Its like the forearm of a human, our elbow is the fulcrum while you grip things with hand means you life some weight that is load and the arm is where you feel some effort being applied..
What is a long flat sled used for coasting down hills?
Generically, all sleds are flat and used to coast down hills, but there are many different designs.
The Toboggan is a larger sled without runners developed by Native Americans. It is much larger than the Luge seen in Olympic sports.
The bobsled is a also seen in the Olympics and is also quite large, sometimes designed for four people.
How do you Derive variance formula?
var(x) = E[(x - E(x))2]
= E[(x - E(x)) (x - E(x))] <-------------Expand into brackets
= E[x2 - xE(x) - xE(x) + (E(x))2] <---Simplify
= E[x2 - 2xE(x) + (E(x))2]
= E(x2) + E[-2xE(x)] + E[(E(x))2]
= E(x2) - 2E[xE(x)] + E[(E(x))2] <---Bring (-2) constant outside
= E(x2) - 2E(x)E[E(x)] + E[(E(x))2] <--- E[xE(x)] = E(x)E(x)
= E(x2) - 2E(x)E(x) + [E(x)]2 <----------E[E(x)] = E(x)
= E(x2) - 2[E(x)]2 + [E(x)]2
var(x) = E(x2) - [E(x)]2
Which level of measurement in statistics is used for weight?
Ration- the highest level of measurement in terms of statistics which it is an absolute zero, and It is under the quantitative variable(numerical).
Why metals break on dynamic load but not on static load of same magnitude?
That isn't necessarily true. If the metal is under repeated dynamic loading, it becomes a matter of material fatigue and not strength. For instance, if you bend a paper clip back and forth repeatedly, it becomes easy to break. The material properties have changed (more brittle) due to the repeated dynamic load.
In the case of impact or blast loading, it is actually the opposite. Materials often have the ability to withstand much larger loads than they could statically, but for very short durations (on the scale of milliseconds).
because i said so.
Dynamic load- Any load which is nonstatic, such as a wind load or a moving live load.
Static Load - Any load, as on a structure, which does not change in magnitude or position with time
What are the disadvantages of static menu?
A lack of flexibility and limited menu information is another disadvantage that may have surprising implications.
Static Evaluation is the Evaluationn between atoms and stress
What is average life expectancy in America?
The average life expectancy for a male in America is 75.5 years.
The average life expectancy for a female in America is 80.8 years.
What are static caravans made from?
Static caravans are primarily constructed from a steel chassis and are typically built using materials such as wood, aluminum, and fiberglass for the exterior. The walls are often made of a combination of insulation and plywood or composite materials, while the interiors feature drywall or paneling. Windows are usually double-glazed for energy efficiency, and the roofs can be made from various materials like felt or metal. Overall, the construction aims to provide durability, insulation, and comfort for seasonal or permanent living.
A weak static verb, also known as a stative verb, refers to a verb that describes a state or condition rather than an action. These verbs typically convey feelings, thoughts, possession, or existence, such as "to be," "to know," "to love," or "to have." Unlike dynamic verbs, they do not indicate a change or progression but rather represent a static state. In many cases, weak static verbs are not used in the continuous (progressive) form.
What causes static electricity to discharge?
There will be a discharge if:* There is a voltage difference (this can be compared to a pressure difference, in gases), and
* There is a way for the surplus charge to move from one side to the other.
How will you know your sss contribution you forgot your sss number?
Go to your local or neighborhood SS office, and bring ID with you.
They will find your number, give you the complete breakdown of
all your contributions, and issue you a new card with your number.
What is the application of static?
Static can be used in programming to define variables or methods that belong to the class itself, rather than to instances of the class. This allows for shared data among all instances of the class. Static variables and methods can be accessed without creating an instance of the class.
Static creep is the gradual deformation of a material over time when subjected to a constant load or stress below its yield point. Unlike dynamic creep, static creep occurs without any additional external forces or changes in loading conditions. This phenomenon is important to consider in long-term structural design to ensure the reliability and safety of materials.
Why only cos theta is used in vector functions?
It's not. Cos(Θ) only gives you the x-component of a vector.
In order to find its y-component, you also need to use sin(Θ).
What do you mean by coplanner system of intersecting forces?
These are forces which act in the same plane (coplanar, not coplanner!) and that their lines of action all meet at a single point.