All categories

3 years ago

What is the kinetic energy of a ball with a mass of 0. 5 kg and a velocity of 10 m/s? (formula:) 25 j 5 j 50 j 100 j.

SAT

1 answer:

disa [49]3 years ago

7 0

Answer:

given,

mass(m)=0.5 kg

velocity(v)=10m/s

we know

kinetic energy=1/2mv^2

=1/2 *0.5*(10)^2

=25j

You might be interested in

In the system of equations above,K is a constant and x and y are variable. For what value of k will the system of equations have

Alik [6]

eewrwerwerwrwerwerwerw

3 0

3 years ago

A sample of a compound that contains only the elements c, h, and n is completely burned in o2 to produce 44. 0 g of co2, 45. 0 g

Elan Coil [88]

Answer:

B. CH₅N

Explanation:

The combustion reaction of a compound CₐHₓNₙ with O₂ is:

CₐHₓNₙ + O₂ → a CO₂ + X/2 H₂O + n NO₂

Where 1 mole of CₐHₓNₙ with an excess of O₂ produce a moles of CO₂, X/2 moles of H₂O and n moles of NO₂

Thus, you need to convert the mass of CO₂ and H₂O to moles to find the C:H ratio and determine a possible empirical formula thus:

Moles CO₂ (Molar mass 44g/mol):

44g ₓ (1mol / 44g) = 1 mole CO₂ = 1 mole C

Mole of H₂O (Molar mass 18g/mol):

45g ₓ (1 mol / 18g) = 2.5 moles H₂O = 5 moles H

Thus, in the compound you have 5 moles of H per mole of C, and a possible empirical formula is:

B. CH₅N

The only structure that meet this C:H ratio

8 0

3 years ago

That one kid who doesn't know what ur talking about

My name is Ann [436]

Answer:

Second time here for the points

.....

6 0

3 years ago

Two numbers differ by 8 if their product is 713 then the sum of the two numbers is.

const2013 [10]

The sum of the two numbers is equal to 70.

Let the first number be x.

Let the second number be y.

In this exercise, you're required to find two numbers by translating the word problem into an algebraic expression and then solving for the unknown variables (x and y).

Translating the word problem into an algebraic expression, we have;

Two numbers differ by 8:

$x-y=8$ ....equation 1.

The product of the two numbers is 713:

$xy=713$ ....equation 2.

To calculate the sum of the two numbers:

First of all, we would solve for each of the unknown variables (x and y).

From eqn. 1, we have:

$x=8+y$ ....equation 3.

Substituting eqn. 3 into eqn. 2, we have:

$y(y+8)=713\\\\y^2+8y=713\\\\y^2+8y-713=0$

Solving the quadratic equation by factorization, we have:

$y^2-31y +23y-713=0\\\\y(y-31)+23(y-31)=0\\\\(y+23)(y-31)=0$

y = -23 or 31.

For the value of x, when y = 31:

$x=8+31$

x = 39

Now, we can calculate the sum of the two numbers:

$x+y=39+31=70$

Read more on word problems here: brainly.com/question/13170908

4 0

3 years ago

A binomial probability experiment is conducted with the given parameters. Compute the probability of x successes in the n indepe

babymother [125]

Answer:

$P(x = 3) = 0.1700$

Explanation:

Given

$n = 15$

$p = 0.3$

Required

Determine P(x = 3)

This is calculated using:

$P(x) = ^nC_xp^x(1-p)^{n-x}$

So, we have:

$P(x = 3) = ^{15}C_3*0.3^3*(1-0.3)^{15-3}$

$P(x = 3) = ^{15}C_3*0.3^3*(1-0.3)^{12}$

$P(x = 3) = 455 *0.027*(0.7)^{12}$

$P(x = 3) = 455 *0.027*0.0138412872$

$P(x = 3) = 0.17004021325$

$P(x = 3) = 0.1700$

8 0

3 years ago