Answer:
- <u>4s</u>
- <u>50m/s (straight)</u>
Explanation:
I will answer in English.
The translated question is:
- <em>3. In a race whose route is straight, a motorcycle circulates for 30 seconds until it reaches a speed of 162.00km / h. If the acceleration remains the same, how long will it take to travel the remaining 200 meters to pass the finish line and at what speed will it do so?</em>
<h2>Solution</h2>
<u>1. Time</u>
First, you must calculate the acceleration, a, starting from rest (V₀ = 0), with a time fo 30 seconds, and final veloficty, V₁, of 162.00km/h.
Convert 162.00km/h to m/s:
- 162.00km/h × 1,000m/km × 3600s/h = 45m/s
- a = (V₁ - V₀)/t = (45m/s - 0) / (30s) = 1.5m/s²
Now, you can calculate the time to travel 200 meters
The most direct equation is;
Where you know:
Use the quadratic formula with a = 0.75, b = 45, and c = -200
Discard the negative value. The positive value is t = 4.1565s
Round to one significant figure: 4s ← answer
<u>2. Velocity</u>
The speed or magnitude of velocity may be calculated using the equation:
With:
- V₂ = 45m/s + 1.5m/s² × 4.1565s = 51m/s ≈ 50m/s, along the same straight line ← answer
Answer: chemical property
Explanation:
Answer:
B) The ratio of the speed of sound in rod A to the speed of sound in rod B is 1.
Explanation:
Applying Hooke's law,
F = -kx
Where,
F = force
k = spring stiffness
x = length
Element A
F/7k = x
Since, mass = F/A
Ma = 7Mb
Therefore,
7Mb/A*7kb = x
Mb/A*k = x
Element B
F/k = x
Since, mass = F/A
Mb = Mb
Therefore,
Mb/A*kb = x
Ratio of mass of element A and element B
Mb/A*kb : Mb/A*kb
1 : 1
Molecular formula for ammonia is
NH3... Structural formula for ammonia is see the pic. 107.3°
is the bond angle between H-N-H. A pair of dots above N are called lone pair of electrons and are responsible for the basicity of NH3.
The mass of the baked loaf will be less than the original dough. In making dough for bread, we have ingredients that are liquid such as water, melted butter, food flavoring, etc. All of this liquid ingredients mixed on the dough will definitely turn into vapor. This vapor is responsible for releasing of the aroma of the freshly baked bread.