All categories

4 years ago

At what step in the scientific method does a scientific propose the problem that he or she wants to solve

1 answer:

8 0

Answer: That would be the first step of the scientific method. After that, the scientist would research the problem and form a hypothesis

You might be interested in

A businesswoman is rushing out of a hotel through a revolving door with a force of 80 N applied at the edge of the 3 m wide door

mel-nik [20]

Answer:

Explanation:

Given

Force applied $F=80\ N$

Door is $d=3\ m$ wide

for gate to revolve Properly Pivot Point must be at center i.e. 1.5 from either end

Torque applied is $T=force\times distance$

Maximum torque

$T_{max}=F\times \frac{d}{2}$

$T_{max}=80\times \frac{3}{2}$

$T_{max}=120\ N-m$

7 0

3 years ago

Distance and ___ are really the same quantity. A. length b. direction c. speed d. displacement

Oksi-84 [34.3K]

Answer:

distance and length are the same quantity

4 0

3 years ago

Find the distance travelled when the initial angular velocity is 3 rad/s, the final angular velocity is 25 rad/s and the time of

Llana [10]

Answer:

Please find attached pdf

Explanation:

Download pdf

5 0

3 years ago

4. A family leaves from New York City and is flying to Los Angles which is 2800mi away. It takes

Blizzard [7]

The average speed of the whole travel is equal to <u>400 mph</u>.

Why?

From the statement, we know that whole travel is divided into three parts. For the first part (traveling from New York to Chicago), we have that it was 3.25 hours and the covered distance was half of the total distance (1400mi). For the second part, we have that it was 1 hour (layover time), and the covered no distance. For the third part (traveling from Chicago to Los Angeles), we have that it was 2.75 hours, and it took the other half of the total distance (1400mi).

We can calculate the average speed of the whol travel using the following formula:

$AverageSpeed=\frac{distance_{1}+distance_{2}+distance_{3}}{time_{1}+time{2}+time_{3}}$

Now, substituting and calculating, we have:

$AverageSpeed=\frac{1400mi+0mi+1400mi}{3.25h+1h+2.75h}$

$AverageSpeed=\frac{2800mi}{7h}=400mph$

Hence, we have the average speed of the whole travel is equal to 400 mph.

Have a nice day!

7 0

4 years ago

That's because helium molecules are not packed together as densely as air molecules are. It is this simple reason that helium ba

Zinaida [17]

Answer:

Because the molecules are not packed together as much than the air, in a fixed volume of helium there are fewer particles than in the same fixed volume of air.

This means that the mass of the fixed volume of helium is smaller than the one of air, and then the density, defined as mass/volume, is also smaller.

This is why the balloon floats, because the air is denser, it tries to go down, pushing the ballon upside.

The case is similar for a piece of metal in water, as the metal is way denser than the water, the metal will sink, but for something not as dense, like a balloon with air, the balloon will remain in the surface of the water.

5 0

4 years ago