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3 years ago

Which of the following examples can be solved with unsupervised learning?

Computers and Technology

1 answer:

gtnhenbr [62]3 years ago

6 0

Answer:

Explanation:

Segmentation of students in ‘Technical Aspects of Big Data’ course based on activities they complete. The training data has no labels.

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In terms of computer networking. what is PING?

Andrew [12]

Ping means how much of a delay there is in your connection. The lower the ping, the smaller the delay. This plays an important role in online gaming. If your ping is 350, then your delay is 350ths of a second.

3 0

3 years ago

A 200-g hockey puck is launched at an initial speed of 16 m/s up a metal ramp that is inclined at a 30° angle. The coefficients

rusak2 [61]

Answer:

h = 8.588 m

Explanation:

Given:

Mass of hockey puck: m = 200 g = 0.2 K g

Angle of incline: θ = 30º (with respect to horizontal)

Coefficient of static and kinetic friction between the puck and ramp:

μ s = 0.4 and μk = 0.3

initial speed:

v = 3.5 m /s

Let h be the vertical height reached by the puck, above the ground. This corresponds to a distance of

d = h *sin 30º = 2 *h

along the incline. As the puck is moving, only kinetic friction comes into play as it climbs up the incline. Let N be the normal reaction exerted by the metal ramp on the ball. Then,

N = m*g *cos θ = 0.2 *9.8 1*cos 30 º = 1.6991 N

Therefore, kinetic friction acting on the puck is:

F k = μ k *N = 0.3 *1.6974 = 0.50974 N

From work energy theorem, the change in kinetic energy should equal the work done by friction and gravity. Therefore,

0.5* 0.2 *16² = 0.50974 *2h + 0.2*9.81*h

⇒ h = 8.588 m

8 0

3 years ago

how to answer the questions on brainly? I've typed my answer in the box but there's no submit button or whatever, and the only t

Zigmanuir [339]

Answer:

push the add your answer button

Explanation:

4 0

3 years ago

Read 2 more answers

Assume that name is a variable of type String that has been assigned a value. Write an expression whose value is a String contai

Stella [2.4K]

Corrected (Modified) Question:

i. Assume that name is a variable of type String that has been assigned a value. Write an expression whose value is a String containing the last character of the value of name. So if the value of name were "Smith" the expression's value would be "h".

ii. Given a String variable named sentence that has been initialized, write an expression whose value is the number of characters in the String referred to by sentence.

Explanation of the corrected question

The whole question has been numbered (i) and (ii) just to separate or divide it into clearer sub questions.

Some parts of the question has also been removed since they are repetition of a part of the question.

Answer:

(i) name.charAt(name.length() - 1)

(ii) sentence.length()

Explanation:

No language has been specified in the question for the code to be written in. However, I have chosen to write it in Java.

(i) In Java, to get a particular character in a string str, the function, charAt(x) is used, where x in the function represents the index of the character to be fetched. This is written as str.charAt(x).

In our case, x is the index of the last character in our string. To get the index of the last character in a string say str, the length of the string itself is used. However, indexing starts at zero. Therefore, to get the index, it will be the 1 subtracted from the length of the string as follows:

str.length() - 1

But note that, to get the length of a string, the method length() is used. For example if,

String str = "omobowale";

str.length() will return 9

Now to the question at hand, our string variable name is name.

Therefore to get its last character, we write:

name.charAt(name.length() - 1)

So if;

name = "Smith";

name.charAt(name.length() - 1) will return "h"

(ii) As explained in (i) above, to get the length (number of characters) of the variable string sentence, we simply write;

sentence.length()

PS: The length of a string is the number of characters present in the string.

Hope this helps!

3 0

3 years ago

Define self-esteem: A how I feel about myself B how I visualize myself C how I esteem myself

vitfil [10]

Answer:

A how I feel about myself

Explanation:

Self-esteem is your overall opinion of yourself — how you feel about your abilities and limitations. When you have healthy self-esteem, you feel good about yourself and see yourself as deserving the respect of others. When you have low self-esteem, you put little value on your opinions and ideas.

8 0

4 years ago