Ask question

Ask question

All categories

4 years ago

11

The one invention that has made many complex machines possible is the invention of the:

1 answer:

Dafna11 [192]4 years ago

3 0

Hello!

We can point to the invention of the wheel . The wheel invention made possible the production of hundreds of complex machinery.

Hugs!!
<span>
</span>

You might be interested in

A car is traveling with a velocity of 40 m/s and has a mass of 1120 kg. The car has ___ energy

TiliK225 [7]

Answer:

KE = 1/2mv^2

KE = 1/2(1120)(40^2)

KE = 560(1600)

KE = 896000

Let me know if this helps!

4 0

3 years ago

Define Inertia with an example

DochEvi [55]

Answer:

Inertia resists change in motion. Objects want to stay in rest or motion unless an outside force causes a change. For example, if you roll a ball, it will continue rolling unless friction or something else stops it by force.

EXAMPLE: when you shake a branch the leaves get detached.

Explanation:

7 0

3 years ago

Read 2 more answers

The terminal velocity of a person falling in air depends upon the weight and the area of the person facing the fluid. Find the t

AVprozaik [17]

Answer:

v=115 m/s

or

v=414 km/h

Explanation:

Given data

$A_{area}=0.140m^{2}\\ p_{air}=1.21 kg/m^{3}\\ m_{mass}=80kg$

To find

Terminal velocity (in meters per second and kilometers per hour)

Solution

At terminal speed the weight equal the drag force

$mg=1/2*C*p_{air}*v^{2}*A_{area}\\ v=\sqrt{\frac{2*m*g}{C**p_{air}*A_{area}} }\\ Where C=0.7\\v=\sqrt{\frac{2*9.8*80}{1.21*0.14*0.7} }\\ v=115m/s$

For speed in km/h(kilometers per hour)

To convert m/s to km/h you need to multiply the speed value by 3.6

$v=(115*3.6)km/h\\v=414km/h$

5 0

3 years ago

Itzel travels south 4 miles and then goes east 2 miles and then north 10 miles. What is her displacement? Round your answer to t

expeople1 [14]

The displacement of Itzel according to the question is 6.3 miles SW

Displacement is defined as the distance moved by a body in a specified direction

Find the diagram attached

From the diagram given, we can see that AB is the displacement

To get the length AB, we will have to use the Pythagoras theorem:

$AB^2=2^2+ 6^2\\AB^2 ^2=4+36\\AB^2=40\\AB=\sqrt{40}\\AB= 6.3 miles\\$

From the diagram, we can also se that the direction of the displacement in the South West direction.

Hence the displacement of Itzel according to the question is 6.3 miles SW

Learn more here: brainly.com/question/19108075

7 0

3 years ago

How do I solve this problem

PilotLPTM [1.2K]

Answer:

it is light

Explanation:

the arrow that says light is on the glass it must be near from tungsten

5 0

3 years ago