<u>Answer:</u>
<u>Answer:Chromium</u>
Explanation:
Chromium is the first element in the sixth column of the periodic table. It is classified as a transition metal. Chromium atoms have 24 electrons and 24 protons with the most abundant isotope having 28 neutrons.
Quick definition: fear appeal: making someone do something out of fear of something.
I think the way it's used is that doctors make people dear disease.
Answer:
Transfer of electricity without wire , is known as wireless electricity.
Sir Nicola Tesla came up with this concept.
A 59 kg sprinter, starting from rest, runs 47 m in 7.0 s at constant acceleration.?
What is the sprinter's power output at 2.0 s, 4.0 s, and 6.0 s?
Instantaneous Power is the force times velocity
P = Fv
Because the acceleration is constant, the force will be constant as well
F = ma
P = mav
for constant acceleration, the velocity at each time is found using
v = at
P = ma(at) = ma²t
find the acceleration using kinematic equation
s = ½at²
a = 2s/t²
a = 2(47) / 7.0²
a = 1.918 m/s²
P(2.0) = 59(1.918²)2.0 = 434.25 W = 0.43 kW
P(4.0) = 59(1.918²)4.0 = 868.51 W = 0.87 kW
P(6.0) = 59(1.918²)6.0 = 1302.76 W = 1.3 kW
I hope this helped.
Answer:
r=2.6 cm
Explanation:
Hi!
Lets call steel material 1, and the new alloy material 2. You know their densities:
The volume of a sphere with radius r is given by:
Then the masses of the bearings are:
For the masses to be the same:
![\rho_1 V_1 = \rho_2 V_2\\\frac{V_2}{V_1} =\frac{\rho_1}{\rho_2}\\(\frac{r_2}{r_1})^3 = \frac{8.08}{3.14}=2.57\\r_2=\sqrt[3]{2.57}\;r1 =1.37r_1=1.37*1.9cm=2.6cm](https://tex.z-dn.net/?f=%5Crho_1%20V_1%20%3D%20%5Crho_2%20V_2%5C%5C%5Cfrac%7BV_2%7D%7BV_1%7D%20%3D%5Cfrac%7B%5Crho_1%7D%7B%5Crho_2%7D%5C%5C%28%5Cfrac%7Br_2%7D%7Br_1%7D%29%5E3%20%3D%20%5Cfrac%7B8.08%7D%7B3.14%7D%3D2.57%5C%5Cr_2%3D%5Csqrt%5B3%5D%7B2.57%7D%5C%3Br1%20%3D1.37r_1%3D1.37%2A1.9cm%3D2.6cm)
