<span>The answers that are correct from the chart are as follows: 1. From 1975 to 2010, temperatures on earth were higher than normal. Rest option are incorrect. Because, From 1880 to 1940, temperatures on earth were lower and not higher than normal. The 10 warmest years in the time span all did not occur in 1945. The coolest year in the time span occurred 1910.</span>
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tinyurl.com/wtjfavyw
Answer:
9.4 m/s
Explanation:
The work-energy theorem states that the work done on an object is equal to the change in kinetic energy of the object.
So we can write:
where in this problem:
W = -36.733 J is the work performed on the car (negative because its direction is opposite to the motion of the car)
is the initial kinetic energy of the car
is the final kinetic energy
Solving for Kf,
The kinetic energy of the car can be also written as
where:
m = 661 kg is the mass of the car
v is its final speed
Solving, we find
Answer:
(a): Linear charge density of the circular arc =
(b): Surface charge density of the circular arc =
(c): Volume charge density of the sphere =
Explanation:
<h2><u>
Part (a):</u></h2>
<u>Given:</u>
- Total charge on the circular arc,
- Radius of the circular arc,
- Angle subtended by the circular arc,
We know, e is the elementary charge whose value is
Therefore,
Also, the length l of a circular arc is given as:
The linear charge density of the arc is defined as the charge per unit length of the arc.
<h2><u>
Part (b):</u></h2>
<u>Given:</u>
- Total charge on the circular disc,
- Radius of the circular disc,
Surface area of the circular disc,
The surface charge density of the disc is defined as the charge per unit area of the disc.
<h2><u>
Part (c):</u></h2>
<u>Given:</u>
- Total charge on the sphere,
- Radius of the sphere,
Volume of the sphere,
The volume charge density of the sphere is defined as the charge per unit volume of the sphere.
As frequency decreases , the wavelength will increase !!
frequency= speed of light ÷ wavelength
( inverse relationship )