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Basile [38]
2 years ago
8

Humans sleep in cycles, usually two or three cycles per night. There is a point in each cycle when waking up will leave the slee

per feeling the most rested and refreshed.
After learning about this, a computer programmer designed a new smartphone alarm clock. This new alarm clock uses sensors in the smartphone to detect the sleeper’s motion and determine when the sleeper has reached the best point in the sleep cycle at which to wake up. The app can be downloaded onto any smartphone. Most users who download this app find that it does not help them wake up feeling more refreshed, but they are willing to try improved products in the future.

Which criterion did this sleep cycle alarm clock fail to meet?

a. It did not solve the problem.
b. It was not cost effective enough.
c. It was not readily available.
d. It was not safe for most users.
Physics
2 answers:
Katarina [22]2 years ago
8 0

Answer:

a. It did not solve the problem.

b. It was not cost effective enough.

c. It was not readily available.

d. It was not safe for most users.

Mrrafil [7]2 years ago
4 0
Hi hi I hope you know that you have a great time jaha
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If eight water waves pass an ocean buoy each minute, and successive wave crests are 20 m apart, find the wave speed:____________
Llana [10]

Answer:

The wave speed is calculated below:

Explanation:

Given,

number of waves passed per minute = 8

time period = 1 minute = 60 s

distance between successive wave crests = 20 m

waves passing interval per second = \frac{8}{60} s^{-1}

Now,

wave speed = 20 m × \frac{8}{60} s^{-1}

                     = \frac{8}3} m/s

                     = 2.67 m/s

Hence the wave speed is 2.67 m/s.

4 0
3 years ago
For this car, predict the shape of a graph that shows distance (x) versus time (t). Note that time is the independent variable a
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ANSWER:

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3 years ago
If the mass of an object is doubled, its gravitational force will:
tankabanditka [31]
Increase because the mass of an object aligns with its weight
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3 years ago
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A lever used to lift a heavy box has an input arm of 4 meters and an output arm of 0.8 meters. What is the
Ede4ka [16]
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6 0
3 years ago
An applied pulling force of 100 N is used to accelerate an object to the right along a rough surface that offers 40 N of frictio
blondinia [14]

Answer:

9.8 m/s^2

Explanation:

First of all, we analyze the vertical direction.

Along this direction, the object is in equilibrium, so its acceleration is zero, and therefore  the net force on it is zero. There are only two forces acting on the object vertically: the weight, W (downward), and the normal force, N (upward), and since the net force must be zero, we can write

W=N

And since N = 60 N, the weight of the object is

W = 60 N

From this, we can also find the mass of the object, using the equation:

W=mg \rightarrow m = \frac{W}{g}=\frac{60}{9.8}=6.1 kg

where g=9.8 m/s^2 is the acceleration of gravity.

Now we analyze the forces along the horizontal direction. We have:

A pulling force of F=100 N forward

A frictional resistance of F_f = 40 N backward

So the equation of motion in this direction is

F-F_f = ma

And solving for a, we find the acceleration of the object:

a=\frac{F-F_f}{m}=\frac{100-40}{6.1}=9.8 m/s^2

in the horizontal direction, forward.

4 0
2 years ago
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