Radio waves are used in cell phone wireless communication by this: Radio waves are released from the cell phone and travel to satellites in the stratosphere. After they reach the satellite, they are redirected to the recipient of the call/text.
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Answer: Positive velocity is then speed towards right, and negative velocity is speed towards left. It is the same for acceleration: negative acceleration is acceleration towards left. It slows objects moving towards right
Explanation: In physics calculations, acceleration — just like displacement and velocity — can be positive or negative. can u help me now pls ?
Answer:
(a) 21.44 ft/s
(b) 0 ft/s
(c) 19.51 ft/s
Explanation:
2 in = 2/12 ft = 0.167 ft
For steady laminar flow, the function of the fluid velocity in term of distance from center is modeled as the following equation:
where R = 0.167 ft is the pipe radius and is the constant fluid velocity at the center of the pipe.
We can integrate this over the cross-section area of the in order to find the volume flow
So the average velocity
b) At the wall of the pipe, r = R so
c) At a distance of 0.6 in = 0.6/12 = 0.05 ft
Answer:
See below ↓
Explanation:
Assuming the motion of a simple pendulum, the time period is given by
- ⇒ T = 2π√(L/g)
- ⇒ T₁/T₂ = √(g₂/g₁)
<u>The values we have</u>
- T₁ = 3 s
- g₁ = 9.79 m/s²
- g₂ = 9.82 m/s²
<u>Solving</u>
- T₂ = T₁/√(g₂/g₁)
- T₂ = 3/√(9.82/9.79)
- T₂ = <u>3.004593 seconds</u>
<u></u>
- This many digits are needed because the acceleration is changed by a very small percentage (roughly 2 decimal places)
- So on taking the square root of the ratio of the gravity due to acceleration (2 values), 4 decimal places will be present at the very least
<u></u>
v = u + at
25 = 0 + a(14)
a(14) = 25
a = 25/14
a = 1.71 (3sf)
explanation:
u use the equation of motions
v = u + at
v is final velocity, aka 25
u is initial velocity, which is 0 as it was initially at rest
t is time, which is 14s
then u sub in the values and calculate a