Answer:
Sound waves travels fastest in solids.
Sound waves travels slowest in gases.
Explanation:
Sound waves travels fastest in solids.
Sound waves travels slowest in gases.
1.) The force of gravity is what we call weight, we define it as:
w=mg
w=5,7kg*9,8m/s²
w=55,86kg (b)
2.) We know that:
power=W/t
power=50J/20s
power=2,5Watts (a)
3.) The work done is equal to the potential energy, so:
Epg=mgh
Epg=63kg*9,8m/s²*7m
Epg=4321J
Now we get the power:
power=W/t
power=4321J/5s
power=864Watts
Now:
1HP=746Watts
=1,16HP (b)
4.) We know that:
F=ma
350N=m*10m/s²
m=350N/10m/s²
m=35kg (b)
5.) d.) Aceleration is tha rate of change in velocity, either positive (increasing) or negative (decreasing)
Answer:
I believe its D visible light, infrared, ultraviolet
I'm thinking it is BIOS and UEFI. If it's not it, I'm very sorry
Answer:
1.18 sec
Explanation:
v = 0
u = 3.25m/s
v = u - gt
t1 = u/g = 3.25/9.8 = 0.332 s
height above board = v²/2g =
3.25²/(2×9.8) = 0.54 m
time to fall from there to water
t2 = √(2h/g) = √(2(3+ 0.54)/9.8) = 0.85 s
total time = t1 + t2
total time = 0.85 + 0.332 = 1.182 s
