Q:
A Carnot air conditioner operates between an indoor temp of 20C and an outdoor temp of 39C, how much ENERGY does it need to remove 2000 J of heat from the interior of the house?
A: 130J
i got 121J
O.o?
I've been using those equations and plugged them in (we use an online website) and it was right the first time, and now its not...and logic would state that doing it again would yield correct answers...but I'm not getting them! Why? I haven't a clue.
A 1.75 kg block slides with a speed of 0.880 m/s on a frictionless horizontal surface until it encounters a spring with a force constant of 787 N/m. The block comes to rest after compressing the spring 4.15 cm.
Find the spring potential energy, U, the kinetic energy of the block, K, and the...
even the y?
so i'd have:
ln(y) = (x+7)ln(cos(x))
how do i get rid of the ln on the y?
cause i knew it was a ln problem, just i don't know how to get rid of the ln on the y
What is the longest possible hole-in-one for this golfer? Neglect any distance the ball might roll on the green and assume that the tee and the green are at the same level.
in m
and:
What is the minimum speed of the ball during this hole-in-one shot?
please explain your answers :D...
He just emailed me this:
Bx = 34m in this case --> Ax = (34m) / (-5.2) = ?? (a negative number), so vecA is pointing in the negative x-direction. The magnitude of A will just be |Ax| (since there's no y-component), which is positive.
Just got this email from my prof
Bx = 34m in this case --> Ax = (34m) / (-5.2) = ?? (a negative number), so vecA is pointing in the negative x-direction. The magnitude of A will just be |Ax| (since there's no y-component), which is positive.