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3 years ago

14

A car is traveling 20 meters per second and is brought to rest by applying brakes over a period of 4 seconds. What is the averag

e acceleration over this time interval

1 answer:

seraphim [82]3 years ago

8 0

It would be 0-20/4 so it’d be -5 meters per second

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16x^2y^2-25a^2b^2<br>factorize the expression

SIZIF [17.4K]

Answer:

(4xy+5ab)(4xy-5ab)

Explanation:

16 $x^{2}$ $y^{2}$ -25 $a^{2}$ $b^{2}$

4^2 is 16 and 5^2 is 25,

Also, (x-a)(x+a) = x^2-a^2

So, this factorized is:

(4xy+5ab)(4xy-5ab)

Hope this helps!

8 0

2 years ago

A psychopathologist records the number of criminal offenses among teenage drug users in a nationwide sample of 1,201 participant

lara [203]

Answer:

Standard deviation = 3

Explanation:

Given

$N = 1201$

$SS = 10800$

Required

Determine the standard deviation

First, we need to determine the variance;

$Variance = \frac{SS}{N - 1}$

This gives:

$Variance = \frac{10800}{1201 - 1}$

$Variance = \frac{10800}{1200}$

$Variance = 9$

Know that:

$Variance = SD^2$

Where SD represents standard deviation

This gives

$9 = SD^2$

Take square root

$SD = \sqrt 9$

$SD = 3$

7 0

3 years ago

Find the mass by adding the numbers from the three sliders

shtirl [24]

add the numbers from the three sliders to determine that mass of an object

3 0

2 years ago

How many different values of l are possible for an electron with principal quantum number n=5?

lions [1.4K]

Answer:

different value to l if n=5 are 0,1,2,3,4

7 0

3 years ago

How much work does gravity do on the compressor during this displacement?

gayaneshka [121]

Explanation and Examples

let the mass of the compressor be

mass (m):

height in x axis is (h1)

height in y axis be (h2):

Height difference: h2-h1

displacement x force:

mass x gravity x height

(m)*9.8*(height difference) = ___ J

Since gravity is forcing down, it would be negative!

Put the values that you require and get the answer.

6 0

2 years ago

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