B) low energy, because red is on the far left of the electromagnetic spectrum.
Answer:
The advantages of the multi-stage fitness test and the direct VO2 measurement are that it is the most accurate testing, the disadvantage it requires hard work. The estimated VO2 max requires less activity, but it is less accurate.
Explanation:
Answer:
Explanation:
Cross sectional area of post = 3.14 x(10.5)² x 10⁻⁴ = 346.18 x 10⁻⁴ m²
Weight = mg = 8300 x 9.8 = 8.134 x 10⁴ N
Stress = weight / area
= 8.134 x 10⁴ / (346.18 x 10⁻⁴)
23.49 x 10⁵ N / m²
Strain = stress / modulus of elasticity of steel
modulus of elasticity = 190 x 10⁹ Pa
strain = Stress \ young modulus
=
= 12.36 x 10⁻⁶
strain = change in length / original length
change in length = original length x strain
= 2.7 x 12.36 x 10⁻⁶
= 33.372 x 10⁻³ mm
.033 mm.
Answer:
Explanation:
Momentum is mass multiplied by velocity, p = mv
Velocity is just speed but with a direction. So they can essentially be considered the same thing as long as you acknowledge this fact and understand where each is applied.
12)
First convert the grams to kilograms, those are the standard units us physicists use.
p = (1.25 kg)(17 m/s)
=21.25 kg*m/s
13)
p = mv
32,023.2 kg*m/s = (1,320 kg)(x m/s)
x = 24.26 m/s
Explanation:
The distance between them is 200 km − 20 km = 180 km.
The relative velocity is 30 km/h − (-48 km/h) = 78 km/h.
The time it takes is 180 km / (78 km/h) = 2.31 hours, or 2 hrs 18 min.
Therefore, the trains meet at 9:30 AM.