Answer:
13.309 m/s²
Explanation:
Length from shoulder to hand, l = 30 cm = 0.3 m
initial velocity, u = 1 m/s
final velocity, v = 2.5 m/s
time, t = 3 s
Let the tangential acceleration is a.
by using first equation of motion
v = u + at
2.5 = 1 + 3 a
a = 0.5 m/s²
Let the centripetal acceleration is a'.
a' = v'²/l
a' = 2 x 2 / 0.3
a' = 13.3 m/s²
The tangential acceleration and the centripetal acceleration are both perpendicular to each other. So, the net acceleration is given by
A = 13.309 m/s²
Answer: Brittle
Explanation:
took the test and I chose Soft, Soft is the wrong answer don't choose it. The CORRECT ANSWER IS BRITTLE
Answer:
15,000,000 degrees Celsius
Explanation:
After the temperature reaches this degree, nuclear fusion begins to start.
Explanation:
F =(frac{1}{4{pi}{varepsilon}_o}) x (frac {q_1q_2}{r^2})
F =(frac {5 {times} 10 {times} 8 {times} 10}{0.002 {times} 0.002}) x 9 x 10
F = 900N
Answer:
A = 2.1 × 10^(-4) m²
Explanation:
We are given;
Temperature; T = 2450 K
Emissivity; ε = 0.35
Bulb rating; H = 150 W
To calculate the surface area, we will use the formula;
H = AεσT⁴
Where σ is stephan boltzman constant with a value of 5.66 × 10^(−8) W/m²⋅K⁴
Making A the subject of the formula, we have;
A = H/εσT⁴
Plugging in the relevant values gives;
A = 150/(0.35 × 5.66 × 10^(−8) × 2450⁴)
A = 2.1 × 10^(-4) m²
