Which si prefix means one one-hundredth (1/100)?

Which two types of simple machines can be found in a bicycle? lever and wheel and axle pulley and wedge wedge and wheel and axle

insens350 [35]

Answer:

A). A Lever and Wheel and Axle.

Explanation:

1. A wheel axle is most obvious, as the wheels are connected via a chain and axle with spokes. This helps keep the wheels moving forward with less effort than walking.

2. A Lever is used to help Balance you as you ride the bike. Without it, you would tip over, and lose all the momentum you had gained up until that point.

3. (I took the test on e2020)

5 0

4 years ago

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An aircraft component is fabricated from an aluminum alloy that has a plane strain fracture toughness of 40 mpa m (36.4 ksi in.

GarryVolchara [31]

We will first determine using the given if an aircraft component will fracture with a given stress level (260 MPa), maximum internal crack length (6.0 mm) and fracture toughness (40 MPa m ), given that fracture occurs for the same component using the same alloy for another stress level and internal crack length. First, it is necessary to solve for the parameter Y, using Equation 8.5, for the conditions under which fracture occurred (i.e., σ = 300 MPa and 2 a = 4.0 mm). Therefore,

Y = K(Ic)/ sqrt(π a) = 40 MPa( m ) / (300 MPa) sqrt(( π ) ((4 × 10-3 m)/2)) = 1.68

We will now solve for the product Y σ π a for the other set of conditions, so as to ascertain whether or not this value is greater than the K(Ic) for the alloy. Thus,

Y sqrt(π a) = (1.68)(260 MPa) sqrt (( π )[(6 × 10^-3 m)/ 2])
= 42.4 MPa sqrt (m) (39 ksi in. )

Therefore, fracture will occur since this value ( 42.4 MPa sqrt(m)) is greater than the K(Ic) of the material, 40 MPa sqrt(m).

8 0

4 years ago

A flowerpot falls from the ledge of an apartment building. A person in an apartment below, coincidentally holding a stopwatch, n

valkas [14]

Answer

given,

height of window = 4 m

time taken to travel = 1 s

acceleration due to gravity = 9.8 m/s²

$s = ut + \dfrac{1}{2}at^2$

$u = \dfrac{s - \dfrac{1}{2}at^2}{t}$

$u = \dfrac{4 - \dfrac{1}{2}\times 9.8\times 1^2}{1}$

u = -0.905 m/s

initial velocity of ledge v = 0

now,

v² = u² + 2 a s

(-0.905)² = 0 + 2 × 9.8 ×s

s = 0.042 m

6 0

3 years ago

In dealing with every task assigned, why is planning important for a student?

Jet001 [13]

Answer:

Having a planner gives students freedom to plan, organize and keep track of their work to the best of their abilities and requirements. This has a dual benefit in that it increases the student's accountability to the commitments planned as well as provides them with a structure that contributes to their success.

Explanation:

3 0

3 years ago

2. From the preceding calculation, it should be obvious that to experimentally time the

marta [7]

the kinematics relations we were able to find the correct results:

The distance traveled as a function of time

The time for skull to open the paratroopers is 2.7 s

The kinematics allows finding the relationships between the position, the velocity and the acceleration of the bodies, in this case the boy is in free fall down the cliff, as he has a stopwatch in his hand he can mark the position every second that he falls, taken the downward direction as positive.

y = y₀ + v₀ t + ½ g t²

Where y and i are the current and initial height, vo the initial velocity, g the acceleration of gravity and t the time

As it is dropped, its initial velocity is zero and we place the zero of the reference system at the top of the cliff y₀ = 0

y = 0 + 0 + ½ g t²

y = ½ g t²

y = ½ 32.16 f²

y = 16.08 t²

Table 1 shows the distances for the first 5 seconds of the fall

t (s) y (ft)

0 0

1 16.08

2 64.32

3 144.72

4 257.28

5 402.0

In the attachment you can see a graph of distance versus time for this movement

b) We look for the time to obtain the speed of 60 mi / h

Let's reduce units of the speed to ft / s

v = 60 mi / h (5280 ft / 1 mi) (1h / 3600 s) = 88 ft / s

Let's use the kinematics relation

v = v₀ + g t

t = $\frac{v -v_o}{g}$

t = $\frac{88.0 - 0}{32.16}$

t = 2.7 s

Using the kinematics relations we were able to find the correct results

The distance traveled as a function of time

Tthe time for skull to open the paratroopers is 2.7 s

learn more about kinematics here:

brainly.com/question/5183024

8 0

3 years ago