Answer (soon please)

football game customarily begins with a coin toss to determine who kicks off. The referee tosses the coin up with an initial spe

LuckyWell [14K]

Answer:

1.28 m

Explanation:

You are given the initial speed that is 5 m/s. Since the coin is sent upwards, this means that the speed is positive according to the co-ordinate system in the y axis. Additionally, there is the gravity that curbs the coin in the opposite direction making the final speed becomes zero at the highest point, so the gravity takes negative sign.

So, from the explanation we have:

$Vo = 5 m/s$

$V = 0 m/s$

$a = -9.8 m/s^2$

so, we use the following equation to find y (hight)

$V^2 = Vo^2 + 2ay$

$y = V^2 - Vo^2 / 2a$

$y = (0 m/s)^2 - (5 m/s)^2 / 2*(-9.8 m/s^2)$

$y = - (25 m^2 / s^2) / -19.6 m /s^2$

$y = 1.28 m$

3 0

3 years ago

Calculate the change in entropy when 1.00 kg of water at 100 âˆ˜c is vaporized and converted to steam at 100 âˆ˜c. Assume that t

pickupchik [31]

Answer:6.04 kJ/K

Explanation:

Given

mass of water $m=1 kg$

Latent heat of vaporization is $L=2256\times 10^{3} J/kg$

entropy at constant temperature is given by

$\Delta S=\frac{Q}{T_0}$

$Q=m\times L$

$Q=1\times 2256\times 10^3$

$\Delta s=\frac{2256\times 10^3}{100+273}$

$\Delta s=6.04kJ/K$

5 0

4 years ago

A remote controlled car is moving in a vacant parking lot. The velocity of the car as a function of time is given by v= [5.00 m/

Jlenok [28]

The magnitude and direction of the velocity of the car at t = 8.00 s is v = 7,468 m / s and the vector direction = θ = 58,984°

<h3><em>Further explanation</em></h3>

In the coordinates of the two-dimensional plane (xy) there is a position vector of a point

You can write P as:

P = xi + yi

where i denotes the unit vector in the x and y directions

While the magnitude of the vector:

$\large{\boxed{\bold{P~=~\sqrt{x^2~+~y^2}}}}$

and its direction

$\large{\boxed{\bold{\theta~=~arc~tan\frac{y}{x}}}}$

Likewise with the instantaneous speed which is a derivative of the position function of time

$V =\frac{dP}{dt}$

$V ~=~\frac{dx}{dt}i~i~+\frac{dy}{dt}j$

V = vx i + vy j

The velocity of the car as a function of time is given by v = [5.00 m / s - (0.0180 m / s²) t²] i + [2.00 m / s + (0.550 m / s²) t] j so that:

vx = 5 - 0.0180t² i

vy = 2 + 0.55t j

So the instantaneous velocity at t = 8 s becomes:

vx = 5-0.0180.8²

vx = 3,848 m / s

vy = 2+ 0.55.8

vy = 6.4

So the velocity position vector becomes:

v = 3,848 i + 6.4 y

and the magnitude becomes:

$v=\sqrt{3.848^2+6.4^2}$

v = 7,468 m / s

While the velocity vector direction:

$\theta~=~=arc~tan\frac{vy}{vx}$

$\theta~=~arc~tan~\frac{6.4}{3.848}$

θ = 58,984

<h3><em>Learn more</em></h3>

Which vector should be negative

brainly.com/question/11236351

the statements that describe a vector

brainly.com/question/4417902

the resultant vector

brainly.com/question/11194474

Keywords: velocity, vector, two-dimensional coordinates,

4 0

3 years ago

Read 2 more answers

A bowling ball has a mass of 6 kilograms. A person lifts the bowling ball 2 meters above the ground, using a force of about 60

Luba_88 [7]

The amount of work done by the person is equal to 120 Joules.

<u>Given the following data:</u>

Force = 34 Newton.

Displacement = 15 meters.

Mass = 6 kilograms.

To calculate the amount of work done by the person at a total height of 2 meters:

<h3>How to calculate work done.</h3>

In Science, work done is calculated by multiplying force and the displacement experienced by an object.

Mathematically, work done is given by the formula:

$Work\;done = force \times displacement$

Substituting the given parameters into the formula, we have;

$Work\;done = 60 \times 2$

Work done = 120 Joules.

Read more on work done here: brainly.com/question/22599382

4 0

2 years ago

The _________ contains the majority of the mass of the atom but is much ________ than the atom.

Nataly [62]

Answer:Proton

smaller

Explanation:

8 0

4 years ago