Answer:
5) Friction.
Explanation:
The force that provides the necessary centripetal acceleration is the friction. The centripetal acceleration must be horizontal, directed to the center of the circular trajectory. Gravity and normal force are vertical, air resistance is against the speed of the car (not towards the center of the trajectory) and there is no tension in this example.
Answer:
28 m/s
Explanation:
vf^2=vi^2+2a(delta y)
=sqrt(2* -9.8 m/s^2* -40 m)
=28 m/s
<span>Answer:
p[0] = 0
v[0] = 50 mi/h = 50 * 5280 / 3600 ft/s = 50 * (22/15) ft/s = 10 * 22/3 ft/s = 220/3 ft/s
a = -50 ft/s^2
a = -50
Integrate to find velocity
v = -50t + C
220/3 = -50 * 0 + C
220/3 = C
v = 220/3 - 50t
Find when v = 0
0 = 220/3 - 50 * t
50 * t = 220/3
t = 220 / 150
t = 22/15
Integrate the velocity function to find the position function
p = (220/3) * t - 25 * t^2 + C
0 = (220/3) * 0 - 25 * 0^2 + C
0 = C
p = (220/3) * t - 25 * t^2
t = 22/15
p = (220/3) * (22/15) - 25 * (484/225)
p = (4840 / 45) - 484 / 9
p = 484 * (10/45 - 1/9)
p = 484 * (2/9 - 1/9)
p = 484 * (1/9)
p = 484/9
p = 53.777777777777777777777777777778
53.8 feet</span>
Question:
A. Engineer A: "When the sample alpha decays, it will give off alpha particles. These will
trigger a photosensor (a device that senses forms of light) that will open the lock."
B. Engineer B: "When the sample alpha decays, it only releases large amounts of heat.
This will trigger a thermometer that will open the lock."
C. Engineer C: "When the sample alpha decays, it will lose mass, This will trigger a scale
that will open the lock."
D. Engineer D: "When the sample alpha decays, it will give off negatively charged alpha
particles. Because alpha particles are electrons, they will complete a circuit that will
open the lock."
Answer:
The correct option is;
A. Engineer A: "When the sample alpha decays, it will give off alpha particles. These will trigger a photosensor ( a device that senses forms of light) that will open the lock"
Explanation:
Here, we note that in alpha decay (α-decay) there is an emission of an alpha particle or helium nucleus with the transformation of the parent element nucleus into that of a different element, having reduced mass and atomic numbers
Alpha particles are a form of ionizing radiation with a mass of 6.64 × 10⁻²⁷ kg and therefore they can be sensed by a photo sensor but will be slowly sensed by a scale.
The answer is Homeostasis