1. Naturally occurring
2. Inorganic
3. Crystalline structure
4. DEFinite chemical composion
5. Solid
Answer:
<em>d. She will be slightly lower than you but moving upward toward you</em>.
Explanation:
Since your swing is slightly shorter than your friend's swing, then you will have more angular speed than your friend. Angular speed increases with a decrease in radius. The closer the body is to the center, the faster the body swings. By the time you would have completed one complete swing back and forth, your friend will just be moving towards you, and she will be slightly lower than you but moving upwards towards you. This principle is the same reason gymnasts pull their limbs closer to their body when they need to swing faster.
The equation that relates distance, velocities, acceleration, and time is,
d = V₀t + 0.5gt²
where d is distance,
V₀ is the initial velocity,
t is time, and
g is the acceleration due to gravity (equal to 9.8 m/s²)
(1) Dropped rock,
(3 x 10² m ) = 0(t) + 0.5(9.8 m/s²)(t²)
The value of t from this equation is 24.73 s
(2) Thrown rock with V₀ = 26 m/s
(3 x 10² m) = (26)(t) + 0.5(9.8 m/s²)(t²)
The value of t from the equation is 5.61 s
The difference between the tim,
difference = 24.73 s - 5.61 s
difference = 19.12 s
<em>ANSWER: 19.12 s</em>
Answer:
T = 53.44 ° C
Explanation:
For this exercise we will use the relationship between the speed of sound and the wavelength and frequency
v = λ f
v = 0.285 1270
v = 361.95 m / s
The speed of sound is related to temperature in degrees Celsius
v = 331 √(1 + T / 273)
v² / 331² = 1 + T / 273
T / 273 = v² / 331² -1
T = 273 (v² / 331² -1)
Let's calculate
T = 273 (361.95²/331² -1)
T = 53.44 ° C