Answer:
The answer to the first one is, group 1.
Explanation:
Sorry if this didn’t help if I find the answers to the others I’ll comment them to myself!
Answer:
C
Explanation:
Acceleration is defined as a change in velocity over time. This means that as long as the forces are not zero, the velocity should be changing. The can be negative (as this is negative acceleration also known as deceleration) or positive (known as acceleration). It doesn't matter if they are decimals or fractions.
Answer:
25.95 m
Explanation:
m = mass of the bungee jumper = 50 kg
k = spring constant of the cord = 100 N/m
x = stretch of the cord
L = length of the cord = 10 m
h = height dropped by the bungee jumper = L + x = 10 + x
Using conservation of energy
Spring potential energy = gravitational potential energy
(0.5) k x² = mg h
(0.5) (100) x² = (50) (9.8) (10 + x)
x = 15.95 m
d = distance traveled below the bridge
d = L + x
d = 10 + 15.95
d = 25.95 m
Answer:
Explanation:
Total heat = Work done = Force × distance
distance = 0.075 × 12 = 0.9 m
W = 45 × 0.9 = 40.5 joules
Specific heat of the human hand = 3.5 kj/kg = 3.5 j/g
Q = MCΔT
ΔT = (Q) ÷ (MC)
ΔT = 40.5 ÷ (3.5 × 1) = 11.57°C
