From 50km/h to 0km/h in 0.5s we need next acceleration:
First we convert km/h in m/s:
50km/h = 50*1000/3600=13.8888 m/s
a = v/t = 13.88888/0.5 = 27.77777 m/s^2
Now we use Newton's law:
F=m*a
F=1700*27.7777 = 47222N
Answer:
Maximum linear charge density = 84.14 nC/m
Explanation:
Looking at this question, The electric field of a line charge of infinite length is given
by : Er = (1/(2πεo)) x (λ/r)
r = the distance from the center of the line of charge
λ = the linear charge density of the wire.
Now looking at the equatiom, due to the fact that Er varies inveresely with r, its maximum value will occur at the
surface of the wire where r = R, the
radius of the wire:
And so, Emax = (1/(2πεo)) x (λ/R)
Let's make λ the subject of the equation and we get;
λ = 2πεo(REmax)
From the question, R = 0.55/2 = 0.275cm
Also, Emax = 5.50 × 10^(6)
N/C
Let's take the value of the electric constant to be εo = 8.854 x 10^(-9) C^(2) / Nm^2
R = 0.275mm = 0.000275m
Plugging these values into the equation, we get;
λ = 2π x 8.854 x 10^(-12) x 0.000275 x 5.50 × 10^(6) = 84.14 nC/m
Answer:
1.5 times
Explanation:
= depth of the diver initially = 5 m
= density of seawater = 1030 kg m⁻³
= Initial pressure at the depth
= final pressure after rising = 101325 Pa
Initial pressure at the depth is given as
= Initial volume at the depth
= Final volume after rising
Since the temperature remains constant, we have
Answer:
Alloy, metallic substance composed of two or more elements, as either a compound or a solution. The components of alloys are ordinarily themselves metals, though carbon, a nonmetal, is an essential constituent of steel.
Explanation:
Alloys are usually produced by melting the mixture of ingredients. The value of alloys was discovered in very ancient times; brass (copper and zinc) and bronze (copper and tin) were especially important. Today, the most important are the alloy steels, broadly defined as steels containing significant amounts of elements other than iron and carbon. The principal alloying elements for steel are chromium, nickel, manganese, molybdenum, silicon, tungsten, vanadium, and boron have a wide range of special properties, such as hardness, toughness, corrosion resistance, magnetizability, and ductility. Nonferrous alloys, mainly copper–nickel, bronze, and aluminum alloys, are much used in coinage. The distinction between an alloying metal and an impurity is sometimes subtle; in aluminum, for example, silicon may be considered an impurity or a valuable component, depending on the application, because silicon adds strength though it reduces corrosion resistance.
