Answer and Explanation
An electric devise which extracts heat from a point and transfers it to another is called a heat pump. Refrigerators and air conditioners apply this technology.
A heat pump circulates the refrigerant through an evaporation and condensation cycle to transfer the heat. A compressor then pumps the refrigerant substance between two heat exchanger coils. In one of the coil, the refrigerant undergoes evaporation at low pressure to absorb heat from the surrounding. The refrigerant then undergoes compression to follow the other coil where it undergoes condensation at high pressure. It releases the heat at this point that has been absorbed in the cycle.
Answer:
7.84 m/s
Explanation:
Height, h = 2 m
Initial velocity, u = 10 m/s
Angle, A = 80°
(a) Let the time taken to go to the net is t.
Use second equation of motion
Time cannot be negative.
So, t = 0.2 s
The vertical velocity at t = 0.2 s is
v = u + at
v = 10 sin 80 - 9.8 x0.2
v = 9.8 - 1.96 = 7.84 m/s
The answer is, "N<span>imbostratus cloud". </span>
D=rt
when biker A catches biker B, the time they've been riding is the same, so
t=t, or d/r=d/r
the rates are 6.4 and 4.7, so
d/6.4=d/4.7
biker B is 34m ahead, so
(d+34)/6.4=d/4.7
multiply both sides by 6.4*4.7:
4.7(d+34)=6.4d
4.7d+=6.4d+159.8
1.7d=159.8
d=94 meters
Another way to think of it is that biker A gains 1.7 meters on B every second (6.4-4.7=1.5), so the time it'll take for him to gain 34 meters is 34/1.7=20 seconds. In that time, biker B travels 4.7*20=94 meters