Answer:
Answered
Explanation:
a) What is the work done on the oven by the force F?
W = F * x
W = 120 N * (14.0 cos(37))
<<<< (x component)
W = 1341.71
b) 
= 29.4 N
W_f= 328.72 J = 329 J
c) increase in the internal energy
U_2 = mgh
= 12*9.81*14sin(37)
= 991 J
d) the increase in oven's kinetic energy
U_1 + K_1 + W_other = U_2 + K_2
0 + 0 + (W_F - W_f ) = U_2 + K_2
1341.71 J - 329 J - 991 J = K_2
K_2 = 21.71 J
e) F - F_f = ma
(120N - 29.4N ) / 12.0kg = a
a = 7.55m/s^2
vf^2 = v0^2 + 2ax
vf^2 = 2(7.55m/s)(14.0m)
V_f = 14.5396m/s
K = 1/2(mv^2)
K = 1/2(12.0kg)(14.5396m/s)
K = 87.238J
Answer:
4Q
Explanation:
Case 1 :
= mass of the metal
= specific heat of the metal
= Change in temperature = 7 - 4 = 3 C
Amount of heat required for the above change of temperature is given as
Case 2 :
= mass of the metal
= specific heat of the metal
= Change in temperature = 19 - 7 = 12 C
Amount of heat required for the above change of temperature is given as
Hence the correct choice is
4Q
<span>What type of severe weather, direction the weather, any significant weather that may cause death or property destruction, and what areas will be affected by the severe weather is the information that is required for advance warnings of severe weather conditions. </span>
Explanation:
Using equation of motion to determine the acceleration of the car,
vf^2 = vi^2 + 2 * a * S,
vf = 0
0 = vi^2 + 2 * a * S
Converting mph to m/s,
3 mph * 5280 ft/mi * 12 in/ft * 2.54 cm/in * 1 m/100 cm * 1 h/3600 s
= 3 * 0.445
v = 1.335 m/s
Converting in to m,
2 in * 2.54 cm/in * 1 m/100 cm = 0.0254 m
= 2 * 0.0254
S = 0.0508 m
0 = 1.335^2 + 2 * a * 0.0508
a = -1.335^2 ÷ 0.1013
= -17.54 m/s^2
Mass of car (assumed) = 2000 kg
Force = ma
= 2000 × 17.54
= 35.08 kN.
that he does not think about how the dart is gonna drop as it travels due to gravity so he should aim higher so the
