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skelet666 [1.2K]
2 years ago
11

Sally and Juan’s science teacher has directed the class to build a paper airplane. The challenge is to build an airplane that fl

ies the farthest distance. The students have two days to design and test their planes. The assignment will end with a “fly-off”. Sally and Juan built their first plane. Whenever they tested the plane, it would take a nose dive into the floor. They changed the design by reshaping the nose of the plane and adding some weight to the tail. The plane flew, but did not get very far. Next they tried to change the way they threw the plane. After many tries, their plane flew an average distance of 35 meters. Sally and Juan's trial and error airplane design could be described as ___________________ in the technological design process.
A) evaluating a solution
B) identifying a problem
C) communicating results
D) implementing a design
Physics
2 answers:
devlian [24]2 years ago
8 0
Evaluating a solution
Sveta_85 [38]2 years ago
6 0

Answer:

A) evaluating a solution

Explanation:

When we try to produce a technological project many problems and difficulties can occur. These problems can hamper the success of the project and turn all dedication into failure. For this reason, it is important for researchers to be quick to identify problems and solve them.

An example of this can be seen in the question above, where Sally and Juan are trying to solve the problem of their planes. They do not know what is causing the problem and are therefore evaluating a solution, in order to continue the project.

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An object traveling 200 feet per second slows to 50 feet per second in 5 seconds. Calculate the acceleration of the object. Use
shtirl [24]

Answer:

-30m/s

Explanation:

Given:

Initial velocity of object  = 200 feet/second

Final velocity of object  = 50 feet/second

Time of travel = 5 seconds

To calculate acceleration of the object we will find the rate of change of velocity with respect to time.

So, acceleration "a" is given by:

a=\frac{v_f-v_i}{t}

where vf represents final velocity, vi represents initial velocity and  is time of travel.

Plugging in values to evaluate acceleration.

a=\frac{50-200}{5}

a=\frac{-150}{5}

a= -30m/s

The acceleration of the object is -30m/s  

3 0
2 years ago
According to the table what was the hikers total displacement the graph has 4km 6km 4km 6km
Xelga [282]

Answer:

0

Explanation:

0 is the answer

6 0
2 years ago
A diver springs upward from a board that is 2.70 m above the water. At the instant she contacts the water her speed is 10.9 m/s
TiliK225 [7]

Answer:

vo=5.87m/s

Explanation:

Hello! In this problem we have a uniformly varied rectilinear movement.

Taking into account the data:

α =69.2

vf = 10m / s

h=2.7m

g=9.8m/s2

We know we want to know the speed on the y axis.

We calculate vfy

vfy = 10m / s * (sen69.2) = 9.35m / s

We can use the following equation.

vf^{2} =vo^{2}+2*g*h\\

We clear the vo (initial speed)

vo=\sqrt{vf^{2}-2*g*h }

v0=\sqrt{(9.35m/s)^{2}-2*9.8m/s^{2} *2.7m}

vo=5.87m/s

7 0
2 years ago
Resultant vector of a force gives us information regarding ___________ of resultant force.
qaws [65]

Answer: direction

Explanation:

Given

The resultant vector of a force gives us information regarding the direction of the resultant force.

If there are multiple forces acted in a different direction then, the resultant vector describes the direction of the resultant force.

5 0
3 years ago
A very thin circular disk of radius R = 20.00 cm has charge Q = 30.00 mC uniformly distributed on its surface. The disk rotates
lutik1710 [3]

Answer:

B= 7.5*10^{-15}T

Explanation:

The magnetic field strenght on the z-axis at a distance d from the center is,

B= \frac{\mu_0 Q\omega R^2}{8\pi d^3}

Our values are:

R=20cm\\Q=30mc\\w=5rad/s\\d=2*10^3cm=20m

Replacing,

B= \frac{(4\pi*10^{}-7)(30*10^{-3})(5)(0.2)^2}{8\pi(20)}

B= 7.5*10^{-15}T

3 0
2 years ago
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