I believe the answer is hertz.
Answer:
i.4.4m/s
ii.5.8m/s
III.5.98m/s
Explanation:
Given Y=70t-16t^2 at t=2
Y= 70(2)-16(2)^2=76m/s
i.at 0.1sec=2.1secs
Y=70(2.1)-16(2.1)^2=76.44m/s
Velocity (76.44-76/.1)=4.4m/s
ii.at t=0.01secs
Y=70(2.01)-16(2.01)^2=76.058m/s
Velocity=(76.056-76/.01)=5.8m/s
ii.at t=0.001
Y=70(2.001)-16(2.001)^2=76.0059m/s
Velocity=(76.0059-76/.001)=5.98m/s
Answer:
When a force acts on an object over a distance, it is said to have done work on the object. Physically, the work done on an object is the change in kinetic energy that that object experiences.
Explanation:
google lol
Answer:
(a) silver
(b) 4.94 x 10^-8 ohm
Explanation:
L = 2.4 m
diameter = 5.99 mm = 5.99 x 10^-3 m
Radius, r = diameter / 2 = 2.995 x 10^-3 m
R = 1.38 x 10^-3 ohm
(a) Let ρ be the resistivity of the material
R = ρ L / A
R A / L = ρ
ρ = (1.38 x 10^-3 x 3.14 x 2.995 x 10^-3 x 2.995 x 10^-3) / 2.4
ρ = 1.62 x 10^-8 ohm-m
The material is silver.
(b) t = 1.2 mm = 1.2 x 10^-3 m
Diameter = 2.24 cm = 0.0224 m
Radius, r = 0.0112 m
Resistance, R = ρ x t / A
R = 1.62 x 10^-8 x 1.2 x 10^-3 / (3.14 x 0.0112 x 0.0112)
R = 4.94 x 10^-8 ohm