Answer: b. infrared
Explanation:
The visible light with the smaller frequency is associated with the color red.
While the blue is the one with the larger frequency.
Now, as the name says, infrared waves are the ones with a frequency just below the one of the red visible light.
Where the frequency of the red light is something around (4.3*10^14 Hz)
and the frequency of the infrared waves is in the range between (10^12 Hz and 10^14 Hz)
Then the correct option is b, infrared.
9. Compounds can form from two nonmetals by sharing their electrons in a
C) covalent
11. An atom that has an excess positive or negative electrical charge caused by the loss or addition of an electron is called a(n) ______.
B) ion
5 is either A or C
Answer:
In Motion in Two and Three Dimensions, we examined the basic concepts of circular motion. An object undergoing circular motion, like one of the race cars shown at the beginning of this chapter, must be accelerating because it is changing the direction of its velocity. We proved that this centrally directed acceleration, called centripetal acceleration, is given by the formula
\[{a}_{\text{c}}=\frac{{v}^{2}}{r}\]
You have to create table using cubic meters and the unit Kelvin to measure the temperature.
Answer:
Explanation:
To determine the normal force, we just need to analyze the situation along the vertical direction.
The box along the vertical direction is in equilibrium, so the equation of the forces is
which means that
The net force can be determined by looking at the situation along the horizontal direction (since the net force in the vertical direction) is zero. Here we have:
- An applied force of 20 N forward, 
- A frictional force of 10 N backward, 
So, the net force is
in the forward direction
The expression for the frictional force is
where 
is the coefficient of friction. Solving for ,
The force of gravity is given by
where m is the mass of the object and 
. Solving for m, we find the mass of the object:
Finally, the acceleration can be found by using Newton's second law
where a is the acceleration. Solving for a,
