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devlian [24]
4 years ago
14

Chloe wanted to find out if the color of a food would affect how quickly kindergarten children would eat it for lunch. She belie

ved that brightly colored food would be eaten more quickly because of the urgency of the color. She put food coloring into 4 identical serving bowls filled with mashed potatoes. A 5th identical bowl received only plain natural mashed potatoes. The colors were natural white, red, blue, green, and yellow. Each child was given a scoop of potatoes. Chloe did this experiment using 50 kindergarten students. 10 students were given each of the colors. She recorded the start and finish time of each student eating the potatoes and then calculated the difference in seconds. She did this over 5 days with each student getting each color. Multiple data takers (Chloe’s friends) made this experiment possible. What would be an appropriate hypothesis for this experiment? a Brightly colored mashed potatoes will be eaten quicker than non brightly colored mashed potatoes. b If you feed students mashed potatoes, then they will be happy. c If the color of mashed potatoes is bright, then students will eat them faster than normally colored mashed potatoes. d If the type of mashed potatoes looks normal, then students will eat them
Physics
1 answer:
Harrizon [31]4 years ago
6 0
A

The reason this is is because she the first sentence says that she believed that people would eat the mashed potatoes faster if they were brighter color.
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The state highway patrol radar guns use a frequency of 8.66 GHz. If you're approaching a speed trap driving 35.0 m/s, what frequ
otez555 [7]

Answer:

The frequency shift detected is \Delta  f  =1010.3 Hz

Explanation:

From the question we are told that

    The normal frequency of the state highway patrol radar guns f = 8.66 GHz =   8.66 *10^{9} \ Hz

     The speed of approach is v  =  35 .0 \ m/s

       

Now the frequency measure by the the state highway patrol radar guns as your car approaches is mathematically represented as

        f_n  =  f (1 + \frac{v}{c} )

Where c is the speed of light which a has constant value of

     c =  3.0 *10^{8 } \ m/s

  Now

       f_n - f  =  \frac{fv}{c} )

=>    \Delta  f  =   \frac{fv}{c}

substituting values

        \Delta  f  = \frac{ 8.66 *10^{9} *  35}{3.0 *10^8 }

        \Delta  f  =1010.3 Hz

 

3 0
4 years ago
An object moving north with an initial velocity of 14 m/s accelerates 5 m/s2 for 20 seconds. What is the final velocity of the o
slavikrds [6]

Answer:

Final velocity of the object(v) = 114 m/s

Explanation:

Given:

Initial velocity (u) = 14 m/s

Accelerates (a) = 5 m/s²

Time taken = 20 seconds

Find:

Final velocity of the object(v) = ?

Computation:

According to 1st law of motion.

⇒ v = u +at

⇒ v = 14 + (5)(20)

⇒ v = 14 + 100

⇒ v = 114 m/s

Final velocity of the object(v) = 114 m/s

8 0
3 years ago
?
Nana76 [90]

Answer:

Electron shell

Nucleus

Neutrons

Explanation:

An atom is made up of three fundamental subatomic particles which are the protons, neutrons and electrons.

  • Protons are the positively charged particles. Neutrons do not carry any charges.
  • Both protons and neutrons are found in the tiny nucleus at the center of that atom.
  • The electrons are negatively charged.
  • They are found outside the nucleus in electronic shells.
5 0
3 years ago
Which part of a circuit changes electrical energy into another form of energy
aniked [119]

Answer:

The reactive part of a circuit changes electrical energy into another form of energy.

Explanation:

The reactive part of a circuit changes electrical energy into another form of energy.

The inductive part of a circuit changes electrical energy to magnetic energy and the capacitive part of a circuit changes electrical energy to electrostatic energy.

6 0
4 years ago
A 1.45 kg falcon catches a 0.515 kg dove from behind in midair. What is their velocity after impact if the falcon's velocity is
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Answer:

Their velocity after the impact is 20.85 m/s.                            

Explanation:

Given that,

Mass of falcon, m_1=1.45\ kg

Mass of dove, m_2=0.515\ kg

Initial speed of the falcon, u_1=26.5\ m/s

Initial speed of the dove, u_2=4.95\ m/s

We need to find the final velocity after the impact. When the falcon catches the dove, it will becomes the case of inelastic collision. The conservation of momentum will be :

m_1u_1+m_2u_2=(m_1+m_2)V\\\\V=\dfrac{m_1u_1+m_2u_2}{(m_1+m_2)}\\\\V=\dfrac{1.45\times 26.5+0.515\times 4.95}{(1.45+0.515)}\\\\V=20.85\ m/s

So, their velocity after the impact is 20.85 m/s.                          

8 0
3 years ago
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