What is the formula for momentum?

Imagine that you lived in a dot on the surface of an expanding balloon, and as you looked to more distant dots, you observed the

Elza [17]

Answer:

$v = \frac{1}{5}\cdot s$

Explanation:

If the distance ( $s$ ) and speed ( $v$ ), measured in centimeters and centimeters per hour, respectively, are directly proportional to each other, then each set of values must observe the following relationship:

$k = \frac{v}{s}$ (Eq. 1)

Where $k$ is the proportionality constant, measured in $\frac{1}{h}$ .

If we know that $s_{1} = 10\,cm$ , $v_{1} = 1\,\frac{cm}{h}$ , $s_{2} = 15\,cm$ , $v_{2} = 2\,\frac{cm}{h}$ , $s_{3} = 15\,cm$ and $v_{3} = 3\,\frac{cm}{h}$ , then the constant of proportionality for each pair is:

$k_{1} = \frac{v_{1}}{s_{1}}$

$k_{1} = \frac{1\,\frac{cm}{h} }{5\,cm}$

$k_{1} = \frac{1}{5}\,\frac{1}{h}$

$k_{2} = \frac{v_{2}}{s_{2}}$

$k_{2} = \frac{2\,\frac{cm}{h} }{10\,cm}$

$k_{2} = \frac{1}{5}\,\frac{1}{h}$

$k_{3} = \frac{v_{3}}{s_{3}}$

$k_{3} = \frac{3\,\frac{cm}{h} }{15\,cm}$

$k_{3} = \frac{1}{5}\,\frac{1}{h}$

As $k_{1} = k_{2} = k_{3}$ , we conclude that correct equation is $v = \frac{1}{5}\cdot s$ .

7 0

2 years ago

Cholrine has an average atomic mass of 35.45 amu. The two naturally occurring isotopes of chlorine are chlorine-35 and chlorine-

Pani-rosa [81]

let the moles of chlorine-35 is n1 and chlorine-37 is n2

now we will use the formula of average atomic mass

$M = \frac{n_1M_1 + n_2M_2}{n_1 + n_2}$

here let say

$\frac{n_1}{n_2} = x$

$35.45 = \frac{x(35) + 37}{x + 1}$

$35.45 x + 35.45 = 35x + 37$

$35.45 x - 35 x = 37 - 35.45$

$0.45 x = 1.55$

$x = 3.44$

so here since ratio of moles of chlorine 35 and chlorine 37 is more than 1 so chlorine 35 is more in the proportion in this mixture so there is most chlorine atom consist of 18 neutrons

6 0

2 years ago

Read 2 more answers

A student examines the effect of the number of D batteries in a closed circuit on the brightness of a light bulb. In the experim

salantis [7]

The correct answer is the Type of batteries

Explanation:

In an experiment, it is normal the researcher modifies one variable, in this case, the number of batteries (independent variable), and this variable affects the variable tested, in this case, the brightness of the bulb (dependent variable).

However, other factors or variables should be constant to guarantee the results are reliable. In this context, one factor that the student should keep constant is the type of batteries he uses because this is not one of the main variables and therefore it is not expected he changes this on purpose or this is affected by other variables. Moreover, by making any change the experiment can be negatively affected. For example, batteries might differ in their power capacity this can affect the brightness of the bulbs.

3 0

2 years ago

At what speed do a bicycle and its rider, with a combined mass of 110 kgkg , have the same momentum as a 1400 kgkg car traveling

DanielleElmas [232]

Answer:

Explanation:

Step one:

given data

let the mass of the rider be m,=110kg

let the velocity be v=?

let the mass of the car be M,=110kg

let velocity of the car V=6m/s

Step two:

the momentum of an object is given by the expression

P=mv

Step two:

since the two the bicycle rider must have the same momentum as the car,

then we need to equate their momentum

mv=MV

110*v=1400*6

110v=8400

divide both sides by 110 to find v

v=8400/110

v=76.36m/s

The rider is expected to have a speed of 76.36m/s

5 0

2 years ago

In which of the following scenarios does object 1 do +10 joules of work on object 2?

Neporo4naja [7]

Answer:

a. Object 1 exerts a 10 newton force on object 2 in the direction of its 1 meter displacement.

Explanation:

4 0

2 years ago