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Nostrana [21]
4 years ago
7

During a race, four competitors of the same weight rode identical bicycles for 10 minutes. Which bicycle stopped for a short dri

nk break?
Physics
2 answers:
wlad13 [49]4 years ago
7 0

Answer:

The one with the least stamina.

Explanation:

As the one with the least amount of stamina would have a harder time at longer distances than the other bikers then they would be the first to stop for a break.

klasskru [66]4 years ago
5 0

Answer:

b

Explanation:

just took it

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The distance between adjacent nodes in a standing wave pattern in a length of string is 25.0 cm:A. What is the wavelength of wav
mina [271]

A) 50 cm

B) 10000 cm/s

Explanation

Step 1

A)

If you know the distance between nodes and antinodes then use this equation:

\begin{gathered} \frac{\lambda}{2}=D \\ \text{where}\lambda\text{ is the wavelength} \\ D\text{ is the distance betw}een\text{ nodes} \end{gathered}

then, let

D=\text{ 25 cm }

now, replace to find the wavelength

\begin{gathered} \frac{\lambda}{2}=25 \\ \text{Multiply both sides by 2} \\ \frac{\lambda}{2}\cdot2=25\cdot2 \\ \lambda=50\text{ Cm} \end{gathered}

so, the wavelength is

A) 50 cm

Step 2

The speed of a wave can be found using the equation

v=\lambda f

or velocity = wavelength x frequency,

then,let

\begin{gathered} \lambda=50\text{ cm} \\ f=200\text{ Hz} \end{gathered}

replace and evaluate

\begin{gathered} v=\lambda f \\ v=50\text{ cm }\cdot200\text{ HZ} \\ v=10000\text{ }\frac{\text{cm}}{s} \end{gathered}

so

B) 10000 cm/s

I hope this helps you

6 0
2 years ago
A lead ball is dropped 30 feet from a church tower. If the acceleration due to gravity is 9.8m s^-2, how long does it take the b
Alika [10]

<em>fina</em><em>l</em><em> </em><em>velo</em><em>city</em><em> </em><em>of</em><em> </em><em>a</em><em> </em><em>falli</em><em>ng</em><em> </em><em>obj</em><em>ect</em><em> </em><em>=</em><em> </em><em>0</em>

<em>and</em><em> </em><em>accel</em><em>eration</em><em> </em><em>of</em><em> </em><em>a</em><em> </em><em>falli</em><em>ng</em><em> object</em><em> </em><em>is</em><em> </em><em>nega</em><em>tive</em>

<em>now</em><em> </em><em>usi</em><em>ng</em><em> </em><em>the</em><em> </em><em>exp</em><em>ression</em><em> </em><em>(</em><em> </em><em>Newton's</em><em> </em><em>3</em><em>r</em><em>d</em><em> </em><em>eq</em><em>uation</em><em> </em><em>of</em><em> </em><em>mo</em><em>tion</em><em>)</em>

<em>{v}^{2}  =  {u}^{2}  - 2gs</em>

<em>wher</em><em>e</em><em> </em><em>the</em><em> </em><em>para</em><em>meters</em><em> </em><em>ha</em><em>ve</em><em> </em><em>the</em><em>ir</em><em> </em><em>usu</em><em>al</em><em> </em><em>meaning</em>

<em>maki</em><em>ng</em><em> </em>

<em>{u}^{2}  \: the \: subject</em>

<em>thus</em><em> </em>

<em>{u}^{2}  = 2gs</em>

<em>u =  \sqrt{2gs}</em>

<em>from</em><em> </em><em>the</em><em> </em><em>question</em><em>,</em><em> </em>

<em>g</em><em>=</em><em> </em><em>9</em><em>.</em><em>8</em><em>m</em><em>/</em><em>s^</em><em>2</em>

<em>s</em><em> </em><em>=</em><em> </em><em>3</em><em>0</em><em>m</em>

<em>sub</em><em>stitute</em><em> </em><em>the</em><em>m</em><em> </em><em>in</em><em>to</em><em> </em><em>th</em><em>e</em><em> equation</em>

<em>u =  \sqrt{2(9.8 \times 30)}</em>

<em>u =  \sqrt{588}</em>

<em>u</em><em> </em><em>=</em><em> </em><em>2</em><em>4</em><em>.</em><em>2</em><em>5</em><em>m</em><em>/</em><em>s</em>

<em>but</em><em> </em><em>the</em><em> </em><em>qu</em><em>estion</em><em> </em><em>is</em><em> </em><em>dem</em><em>anding</em><em> </em><em>for</em><em> </em><em>tim</em><em>e</em><em> </em><em>but</em><em> </em><em>no</em><em>t</em><em> </em><em>the</em><em> </em><em>ini</em><em>tial</em><em> </em><em>veloc</em><em>ity</em>

<em>so</em><em> </em><em>sub</em><em>stitute</em><em> </em><em>them</em><em> </em><em>in</em><em> </em><em>the</em>

<em>Newton's</em><em> first</em><em> </em><em>eq</em><em>uation</em><em> </em><em>of</em><em> </em><em>motion</em>

where

V = u - gt

but from the question,

v= 0 and the acceleration is negative because it's a free fall

substitute the values into the equation

0 = 24.24 -9.8t

making t the subject

9.8t = 22.24

dividing through by 9.8

9.8t/9.8 = 22.24/9.8

t = 2.3s . therefore, it would take 2.3s for the ball to hit the ground.

4 0
4 years ago
I AN TIMED, HURRY!!
kramer

Answer:

C)0.59 N

Explanation:

By the Achemides principle we know that the buoyancy force on an object which is immersed in a incompressible fluid at rest is equal to the weight of the fluid displaced. So all we have to do is to find the mass of 60ml.

Density = mass / volume

Mass = density × volume

= 1 g/cm³× 60 cm³

{ as 1ml=1cm³}

= 60 g

So force equals to,

Force = weight = mass × gravitational acceleration

= 0.06×9.8 = 0.59 N

6 0
4 years ago
Read 2 more answers
Which statements are explained by Newton’s law of universal gravitation?
olga2289 [7]

Answer:

Below

Explanation:

The strength of Earth’s gravity decreases as an object gets farther from Earth.   <===== this is the only statement that is true

3 0
1 year ago
Which of the following is an example of how humans can increase biodiversity?
Leto [7]

Answer:

The following is an example of how humans can increase biodiversity

Provide Wildlife Corridors and Connections Between Green Spaces

Use Organic Maintenance Methods and Cut Back On Lawns

Use a Native Plant Palette and Plant Appropriately

Utilize Existing Green Space Connections

Be Mindful of Non-Native Predators

7 0
3 years ago
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