Answer:
R = 11.8 ohms
Explanation:
Formula
R = R_ref[1 + a(T - T_ref)]
Givens
- R_ref = 10 ohms
- T_ref = 20oC
- T = 65oC
- a = 0.004
- R = resistance at 65oC = ???
Solution
R = 10*[1 + 0.004(65 - 20)]
R = 10*[1 + 0.004(45)]
R = 10*[1 + 0.18]
R = 10*(1.18)
R = 11.8 ohms
Be sure you understand not to add the 1 and 0.004 together. You don't get 1.004 at any point of the solution. If you do, you won't know what to do (exactly) with the 45.
Answer:
a = 0 m/s²
Explanation:
Static friction = Fn*μ = 50 * 0.5 = 25 N
25 N > 20 N
As the static friction is more than the force applied, the box will not move ;
a = 0 m/s²
Answer:
The star-sphere discovered by the Greeks and other ancient civilizations which shows the physical location in space of the nearby stars.
Explanation:
The celestial sphere is an ideal sphere, without defined radius, concentric with the terrestrial globe, in which the stars apparently move. Some ancient civilizations such as the Greeks assumed that the stars were attached to a celestial sphere, which revolves around the earth, while our planet is always immobile.
Answer:
s = 27 m
Explanation:
given,
acceleration of the car, a = 6 m/s²
time of the travel, t = 3 s
final speed of the car, v = 0 m/s
using equation of motion
v = u + a t
0 = u - 6 x 3
u = 18 m/s
initial speed of the car = 18 m/s
Again using equation of motion
v² = u² + 2 a s
0 = 18² - 2 x 6 x s
12 s = 324
s = 27 m
Distance travel by the car is equal to 27 m.