Answer: the pair of sunglasses
Explanation:
A good pair of sunglasses are composed of abosorbent lenses that filter the sunlight that affects the eyes retina, especially ultraviolet (UV). So, these sunglasses are used to reduce the amount of light or radiant energy transmitted.
On the other hand, normal reading glasses (in which the lens glass has not been treated to filter ultraviolet sunlight) will let UV rays pass through.
Therefore, if both glasses are exposed to sunlight, the sunglasses are expected to be warmer by absorbing that radiant energy and preventing it from reaching the eyes.
Answer:
y = 54.9 m
Explanation:
For this exercise we can use the relationship between the work of the friction force and mechanical energy.
Let's look for work
W = -fr d
The negative sign is because Lafourcade rubs always opposes the movement
On the inclined part, of Newton's second law
Y Axis
N - W cos θ = 0
The equation for the force of friction is
fr = μ N
fr = μ mg cos θ
We replace at work
W = - μ m g cos θ d
Mechanical energy in the lower part of the embankment
Em₀ = K = ½ m v²
The mechanical energy in the highest part, where it stopped
= U = m g y
W = ΔEm = - Em₀
- μ m g d cos θ = m g y - ½ m v²
Distance d and height (y) are related by trigonometry
sin θ = y / d
y = d sin θ
- μ m g d cos θ = m g d sin θ - ½ m v²
We calculate the distance traveled
d (g syn θ + μ g cos θ) = ½ v²
d = v²/2 g (sintea + myy cos tee)
d = 9.8 12.6 2/2 9.8 (sin16 + 0.128 cos 16)
d = 1555.85 /7.8145
d = 199.1 m
Let's use trigonometry to find the height
sin 16 = y / d
y = d sin 16
y = 199.1 sin 16
y = 54.9 m
Answer:
There would be a pressure drop in the direction of the higher opening. This will force air to move in from the lower opening and force it to leave through the higher opening. This will create a convectional movement of air, cooling and ventilating the tunnel.
Explanation:
This is in accordance with bernoulli's law of fluid flow which states that the pressure exerted by a moving fluid is lesser than it would exert if it were at rest.
Answer:
A customer is about to buy a limited edition sports car from Torque. It is most likely that the customer will have d. limited problem solving, in which consumers decision rules to purchase are simple, and are not motivated to search for information about other optons, deciding to buy the car.
Explanation:
a. advertising clutter is the big amount of ad-messages that the consumer is exposed to everyday.
b. high involvement product or purchases features many variables to be considered by the customer before getting to a decision.
c. cognitive dissonance or conflicting attitudes causing mental discomfort.
If the total trip took
2.2 secs, then it must took 1.1 secs to reach max height. <span>
<span>We can then find the max height by realizing that the bag
fell from rest and took 1.1 secs to come back to its launch point, we use formula:</span>
<span>hmax = 1/2 gt^2 = 1/2
(9.8m/s/s)(1.1s)^2 </span>
<span>hmax =5.93m (ANSWER)</span></span>
<span><span>
To get the initial speed, we take that the vertical speed is
zero at max height, and use
vf^2=v0^2+2ad
vf=final speed =0
v0=intiial speed
a=acceleration = -9.8m/s/s
d=distance traveled =hmax= 5.93m
0=v0^2+2(-9.8ms/s/)(5.93m)
v0^2=2x9.8x5.93
<span>v0=10.8m/s (ANSWER)</span></span></span>
