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valkas [14]
2 years ago
9

School PlanSchool Plannerner

Physics
2 answers:
TEA [102]2 years ago
6 0
A student planner is a planner given to students in order to create organization and better communication. With these planners being a part of the classroom experience, students are more likely to keep track of their assignments, set personal goals, and enhance communication between teachers, students and parents.
Kay [80]2 years ago
5 0
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28. Ken and Musa shared a cake such that Ken got twice the size
ratelena [41]

Answer:

Musa = \frac{1}{3}

Ken = \frac{2}{3}

Explanation:

Given

Ken = 2 * Musa --- Ken's share

Required

The fraction each got

Since they both shared a cake, we have:

Ken + Musa = 1

Substitute: Ken = 2 * Musa

2 * Musa+ Musa = 1

Factorize

Musa(2+ 1)= 1

Musa(3)= 1

Divide both sides by 3

Musa = \frac{1}{3}

Recall that: Ken = 2 * Musa

Ken = 2 * \frac{1}{3}

Ken = \frac{2}{3}

3 0
3 years ago
A 250 kg car has 6875 kg•m/s of momentum. What is it’s velocity?
liraira [26]

Answer:

v = 27.5 m/s

Explanation:

p = m × v

6,875 = 250 × v

250v = 6,875

v = 6,875/250

v = 27.5 m/s

5 0
2 years ago
The emissivity of galvanized steel sheet, a common roofing material, is 0.13 at temperatures around 300 K, while its absorptivit
vfiekz [6]

Answer:

Total heat transfer rate is combined convection and radiation transfer rate, multiplied with absorptivity factor. From that equation you can find temperature of the roof using iteration method.  

Explanation:

<u>Known:</u>

steel sheet roof emissivity ∈ = 0.13

steel sheet roof absorptivity \alpha_s = 0.65

air temperature T∞ = 16°C ...= 289K

heat transfer rate G_s = 750 W/m2

natural convection h = 7W/m2K

Total heat transfer rate is combined heat transfer rate of convection and radiation, multiplied with absorptivity factor:  

\alphaG_s=q_{conv} +q_{rad} =hA(T∞-T_m)+∈σA(T_{surf} -T_{s} )

\alphaG_s-h(T_s-T∞)-∈σ(T_{s} -T_{surf} )=0

2562-7T_s-7.371*10^-9=0

Use iteration method to solve for T_s

T_s=350.17 K...=77.17°C

In this particular situation, cat would not be comfortable with walking on a roof since its surface temperature is 77.17°C which may even cause burns to its paws.  

4 0
3 years ago
40 Points!!! Write a summary paragraph discussing this experiment and the results. Use the following questions to help guide the
Gnoma [55]

Answer:

sorry but i dont know can you brainliest me plsss i need it

7 1
2 years ago
Read 2 more answers
Calculate the force required to double the length of a steel wire of area of cross section 5 x 10-5 m2? (Y=2x 1011N m2) (a) 10-5
trapecia [35]

Answer:

Option C is the correct answer.

Explanation:

We equation for elongation

      \Delta L=\frac{PL}{AE}

Here we need to find load required,

We need to double the wire, that is ΔL = 2L - L = L

A = 5 x 10⁻⁵ m²

E = 2 x 10¹¹ N/m²

Substituting

     L=\frac{PL}{5\times 10^{-5}\times 2\times 10^{11}}\\\\P=10^7N

Option C is the correct answer.

8 0
3 years ago
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