Problem 1. A 70-kg person standing on a frictionless platform of ice throws a football
forward with a velocity of 12m/s. If the person moves backward (sliding) with a velocity of
34cm/s, what is the mass of the football?

Problem 2. A car traveling at 8m/s crashes into a car of identical mass stopped at a traffic
light. What is the velocity of the wreckage immediately after the crash, assuming that the
cars stick together?
Problem 3. A 30-kg child stands on a frictionless surface. Th father throws a 0.8-kg football
with a velocity of 15m/s. What velocity will the child have after catching the football?

Problem 4. A billiard ball moving to the left at 30 cm/s collides head with another ball
moving to the right at 20cm/s. The masses of the balls are identical. If the collision is
perfectly elastic, what is the velocity of the first ball after impact if velocity of the second
ball is 4cm/s toward the right?

Problem 5. Two metal balls A and B are suspended, as shown in the figure, so that each
touches the other. The masses are given in the figure. Ball A is pulled to the initial side until it
is 12 cm above its initial position, and then it is released. If it strikes ball B in a completely
elastic collision, find the height h reached by ball B assuming zero friction.

Answers

Answer 1

Answer: The answer is in your heart

Explanation: I don't know, just trust °_°

Answer 2

It depends on the location on the periodic table and if it is easier to loose are gain electrons to fill the valence electron shell.

What is the electron affinity?

The electron affinity of the neutral atom of the element can show indicate whether or not the element is going the make positive or negative ions.  The higher the electron affinity is, the more the neutral atom wants to gain electrons.

The electron affinity for alkali metals and alkaline earth metals are low due to the fact that they are located on the left of the periodic table and only needs to loose 1 or 2 electrons to have a completed valence shell.

That means that they want to form cations (loose electrons).  Halogens have a high electron affinity since they are located on the right of the periodic table and only have to gain 1 electron to get a completed valence electron configuration.  That means that it forms anions.

Therefore, It depends on the location on the periodic table and if it is easier to loose are gain electrons to fill the valence electron shell.

Learn more about periodic table on:

https://brainly.com/question/11155928

#SPJ2


Related Questions

The angle between the incident ray and the reflected ray from a mirror is 720.
Find the angle of incidence.

Answers

Answer:

when a ray of light is incident normally on a plane mirror the angle between incident and reflected ray is 0 degree or 180 degree

Explanation:

20 POINTS! PLZ HELP ME. :-)

Answers

Answer:

A

Explanation:

Because both the elements are non-metals

An object can have forces acting upon it, but might not accelerate

True
or
False?

Answers

Answer:

true

Explanation:

if you apply force to the top of a square it will not move

1. A stone is thrown upwards with an initial velocity of 25 m/s at angle of 30° to the ground a. Show that the vertical component if the velocity at the starting is 12.5 m/s upwards.

Answers

The vertical component of the velocity at the starting is 12.5 m/s upwards.

What is velocity?

Velocity is the direction at which an object is moving and serves as a measure of the rate at which its position is changing as seen from a specific point of view and as measured by a specific unit of time.

In kinematics, the area of classical mechanics that deals with the motion of bodies, velocity is a fundamental idea.

Given that  stone is thrown upwards with an initial velocity of 25 m/s at angle of 30°.

Hence,  the vertical component of the velocity in upward direction = 25 sin30° m/s

= 25 × 1/2 m/s

= 12.5 m/s.

Learn more about velocity here:

https://brainly.com/question/18084516

#SPJ1

Blake strikes a punching bag with 80N of force for 0.05 seconds. John strikes a
punching bag with 60N of force for 0.1 second. Who delivers a greater amount of
impulse?

Answers

Answer:

So impulse= force × timeP1= 80N× 0.05 = 4 P2= 60N × 0.1= 6 Hence John delivers a greater impulse I do exams and quizzes if your interested

i need help it is psychology

Answers

Answer:

C. Forebrain

Explanation:

The Basil Ganglia, sits on the base of the forebrain.

Name some minerals used as gems.​

Answers

Answer:

Minerals to Gemstones

Mineral Name Gemstone Name

Beryl Aquamarine, Beryl, Bixbite, Emerald, Goshenite, Heliodore, Morganite

Brazilianite Brazilianite

Chalcedony Agate, Aventurine, Bloodstone, Carnelian, Chrysoprase, Heliotrope, Jasper, Onyx, Sard

Chrysoberyl Alexandrite, Chrysoberyl

Physics mcq please be sure​

Answers

Answer:

1. c 2.d

Explanation:

we did this in middle school

Hello anyone I need the answer to this, thank you!

Answers

Answer:

yes

yes yes yes yes

yes yes yes

2x+1-2x=8. solve this problem math

Answers

Answer:

x=7

Explanation:

2x+1-2x=8

or,2x-2x=8-1

x=7

13-1 LIVE
2, A rectangulv Container of base socmby 30cm is filled
with water to be depth of 5cm. how much is the pressure exerted
at the base? (take pw= 1000kg /m3 and g=10m/s)​

Answers

Correct question is;

2, A rectangular Container of base 50 cm by 30cm is filled with water to be depth of 5cm. how much is the pressure exerted at the base? (take pw= 1000kg /m3 and g=10m/s)​

Answer:

P = 500 N/m²

Explanation:

Pressure exerted at the base is the hydrostatic pressure and it is given by the formula;

P = ρgh

Where;

ρ is density = 1000 kg/m³

g = 10 m/s²

h is depth = 5 cm = 0.05 m

Thus;

P = 1000 × 10 × 0.05

P = 500 N/m²

Pick all the right ones !!

Answers

Ok it’s this.... wait your the he that got with my bf !!!

What is another term that refers to foodborne illness?

Answers

What the other person said !!

Why can videos be streamed from one computer to another with excellent quality?

Answers

Answer:

(d) they are transmitted using digital signals

Explanation:

i just did the quiz an got it right

Answer:they are transmitted using digital signals

Explanation:

if the 50 kg object slows down to a velocity of 1 m/s how much kinetic energy does it have 100j 50j 25j or none

Answers

[tex]ek = \frac{1}{2}m {v}^{2} [/tex]

[tex]ek = \frac{1}{2}(50) {(1)}^{2} [/tex]

[tex]ek = \frac{1}{2}(50)[/tex]

[tex]ek = 25j[/tex]

//

I'm not really sure but I do know that it's not 0 because the object is still moving, even if it's only moving at 1 m/s.

Where did Ford first see parts made from vanadium steel?​ What properties of this steel impressed Ford? Did Ford need to overcome any problems before going ahead with his plan?

Answers

Explanation:

Historical sources believe that Henry Ford first saw parts made from vanadium steel in Europe which were been used on racing cars and luxurious vehicles.

Ford was impressed due to the fact that Vanadium steel unlike normal steel was cheaper and at the same time stronger and lighter if it was used on automobiles.

Urea gets from body cells to the blood plasma by diffusion through the tissue fluid. Explain what this means?

Answers

Answer:

Glucose diffuse from the blood plasma, across the capillary walls to the tissue fluid, and then to the cell.

Glucose diffuse from the blood plasma, across the capillary walls to the tissue fluid, and then to the cell. The waste product urea diffuse from the cells of the liver to the tissue fluid, and then across the capillary walls into the blood plasma.

Which of the following waves has the longest wavelength? Group of answer choices a.ultraviolet b.gamma c.visible light d.microwaves

Answers

Answer: visible light

Explanation:

Which of the scientist responsible for cell theory would be the most likely to write a book titled Cells Come from Cells

Answers

Answer:

Rudolf Virchow

Explanation:

popularized the cell theory in an 1855 essay entitled “Cellular Pathology.” (b) The idea that all cells originate from other cells was first published in 1852 by his contemporary and former colleague Robert Remak (1815–1865).

Explanation:

Rudolf Virchow

-Rudolf Virchow would be the most likely to write a book titled 'Cells Come From Cells' because in cell theory he added a point that 'All cells arises from pre-existing cells. ' which means that all cells come from another cells which is as similar as the title of the book

how does a longshore current affect a beach?

Answers

Longshore currents are affected by the velocity and angle of a wave. When a wave breaks at a more acute (steep) angle on a beach, encounters a steeper beach slope, or is very high, longshore currents increase in velocity. ... This process, known as “longshore drift,” can cause significant beach erosion.

Answer:

"Longshore currents are affected by the velocity and angle of a wave. When a wave breaks at a more acute (steep) angle on a beach, encounters a steeper beach slope, or is very high, longshore currents increase in velocity. ... This process, known as “longshore drift,” can cause significant beach erosion."

Credits to ocean service

Explanation:

Hope this helps

uses of electromagnetic wave​

Answers

Radio waves - used for communication e.g. radios and TVs

Microwaves - used for cooking food and for satellite communications

Infrared light - used by electrical heaters and infrared cameras

Ultraviolet radiation - kills bacteria - sterilises water and makes it safe to drink and produces vitamin D - good for skin

is the number of paper clips in step 2 the same as the number of paper clips in step 3? why do/don't you think so?​

Answers

We can’t see steps two or three so there isn’t a way to give you the answer that you need

The number of paper clips in step 2 is the same as the number of paper clips in step 3 is a true statement, as the mass is the same for both.

What is mass?

It is possible to define every mechanical quantity in terms of mass, length, and time. The SI unit for mass, denoted by the letter m, is the kilogram. While mass is typically thought of as an immutable feature of an item, relativistic mass must be taken into account when traveling at speeds close to the speed of light.

Given:

The mas of the paper clips are the same,

Assume the number of clips in step two is x and the mass is m, the mass in the third step is the same as in step 2,

Thus, the number of clips = Total mass of paper clip / mass of one clip,

The number of clips = m / x

As we can see, if the mass is equal, then the number of clips will also be equal.

To know more about mass:

https://brainly.com/question/13040516

#SPJ2

What is the volume of the water in the graduated cylinder gizmo Student Volume Lab Sheet (cm3 and mL)

Answers

Answer:

The volume of water in the graduated cylinder will be equal to the calculated volume of the sphere.

Explanation:

The volume of solid objects can be measured by completely immersing these solids in an overflow faucet filled to brim with a liquid in which the solid does not dissolve. This is known as the displacement method. When water is used, it is known as water displacement method.

In the Volume Lab Sheet, a sphere whose volume has been pre-calculated is immersed in the overflow faucet containing water. The displaced water is collected in a beaker and the volume is obtained using a 50 mL measuring cylinder.

The volume of a  sphere is calculated using the following formula:

Vsphere =  4πr³/ 3

The symbol π represents the number pi, which is about 3.14. The letter r stands for the  radius of the sphere, which is the distance from the center of a sphere to its surface. The  radius is exactly half of the diameter, which is the distance across the sphere through its center.

The volume of the water in the measuring cylinder is found to be equal to the calculated volume of the sphere. This is because an object immersed completely in a liquid displaces a volume of liquid equal to its own volume.

Who is farther from home at 4 minutes?

Answers

Answer:

lil's sister

hope this helps pls mark brainliest

Calculate the momentum of a 1kg box moving at a velocity of 50 m/s.

Answers

the momentum = m * v

m : mass

v : velocity

momentum = 1 * 50 = 50 kg.m/s

Will clothes dry faster when they are folded or when they are not folded on the line?

Answers

Answer:

Not folded

Explanation:

not folded on the line


Explain why it is better to jump and land with bent knees rather than straight legs? Use key physics vocabulary.

Answers

Answer:

Bent knees

Explanation:

Depending the height your jumping from, if you were jumping from a high structure it's best if you jump and land on knees so you dont sprang your ankles from jumping and landing on your straight legs, you could even pull a muscle if you land on straight legs.

There is a scale with a basket on it. A brick, brick #1 is placed on the scale. The brick has a mass of 10 kg. What are the two forces acting on the brick?

Answers

Answer:

Weight and reaction.

Explanation:

With respect to Newton's third law of motion, action and reaction have equal magnitude but acts in opposite direction.

Thus, the brick of mass 10 kg has its weight (due to gravitational pull of the earth), which acts downwards through its center of mass. This makes the scale to produce an opposing force of equal magnitude, which acts upwards. These two forces acting in opposite directions balancing each other.

The two forces acting on the brick are: its weight and the reaction from the scale.

tartaric acid is present in spinach true or false ​

Answers

Answer:

false

Explanation:

because Oxalic acid is present in spinach

MARK ME AS BRAINLIST

Where do electrons spend most of their time?

Answers

Answer:

around the nuclei of each atom

Explanation:

Answer:

Before bonding, the atom's electrons spend most of their time around the nuclei of each atom.

Explanation:

Once bonded, the electrons spend most of their time between the two nuclei.

Other Questions
The formula for the volume of a cone is V=13r2h,V= 31 r 2 h, where rr is the radius of the cone and hh is the height of the cone. Rewrite the formula to solve for hh in terms of rr and V.V. When firms develop a WACC for individual projects based on the cost of capital for other firms in similar lines of business as the project, the firm is utilizing a: a. subjective risk approach b. pure play approach c. divisional cost of capital approach d. capital adjustment approach Construct both a 95% and a 90% confidence interval for 1 for each of the following cases a. 1-31 , s-4, SSxx-35, n-10 b/,-65, SSE = 1,860 , SSxx-20, n = 14 c. ,-- 8.6, SSE = 135, SSxx-64, n = 18 a. The 95% confidence interval is 00 (Round to two decimal places as needed.) The 90% confidence interval is 00 (Round to two decimal places as needed.) b. The 95% confidence interval is (Round to two decimal places as needed.) The 90% confidence interval is (Round to two decimal places as needed.) C. The 95% confidence interval is 00 (Round to two decimal places as needed.) The 90% confidence interval is Enter your answer in each of the answer boxes. compare the movement of the amoeba to the movement you saw within the elodea leaf cells. how are they the same? how are they different? the stage of an infectious disease when specific signs and symptoms are seen and the pathogen is at peak activity is called the PLEASE HELP this is a assignment on football instrument with the minimum value of least count give a precise measurement Brennan measured the wading pool at the salem community center and calculated that it has a circumference of 6.28 meters. what is the pool's radius? solve the system of differential equations dx/dt = 4x 7y dy/dt= x-2y some people believe that progressive taxes destroy the incentive to produce more.truefalse The cross-cultural and ethnographic study of cities and life in cities is known as ______ anthropology.biologicaleducationaldevelopmenturban After a gastrectomy, a client has a nasogastric tube to low continuous suction. The client begins to hyperventilate. How does the nurse anticipate that this breathing pattern will alter the client's arterial blood gases?1Increase the PO 2 level2Decrease the pH level3Increase the HCO 3 level4Decrease the Pco 2 level For what values of x does 5x^2+4x-4= 0 question 2 identify the names of the numerical input variables and save it as a list identify the names of the categorical input variables and save it as a list The following table lists the monthly incomes (in hundreds of dollars) and the monthly rents paid (in hundreds of dollars) by a sample of six families. Monthly Income Monthly Rent24 7. 016 4. 519 6. 531 11. 610 4. 527 8. 51 The 99% confidence interval for the slope, B, of the population regression line is (2decimals): __________________________________________2. The null hypothesis is that the slope of the population regression line of monthly renton monthly income is zero and the alternative hypothesis is that the slope of thispopulation regression line is greater than zero. The significance level is 1%. What is thecritical value of t (3 decimals)? __________________________________________3. The null hypothesis is that the slope of the population regression line of monthly renton monthly income is zero and the alternative hypothesis is that the slope of thispopulation regression line is greater than zero. The significance level is 1%. What is thevalue of the test statistic, t, rounded to three decimal places? ______________________4. The null hypothesis is that the slope of the population regression line of monthly renton monthly income is zero and the alternative hypothesis is that the slope of thispopulation regression line is greater than zero. The significance level is 1%. By hand, testwhether the slope of the monthly income is greater than zero using the CV approach, includingidentifying the reject/non reject regions, etc What is 2/3-1/2 mathswatch Find the remainder in the Taylor series centered at the point a for the following function. Then show that lim_n rightarrow infinity|R_n(x)| = 0 for tor all x in the interval of convergence. f(x) = e^-x, a = 0 First find a formula for f^n(x). f^n(x) = (Type an exact answer.) as stated in "view from the empire state building," what is the main reason that helen keller is writing to dr. finley? Hellooo im pretty sure x is 30 but can someone tell me what im meant to write for the reason. Thank youuu Lamike owns 1,000 shares of DAS. Inc.'s common stock. The stock has a par value of $1 per share and is currently selling for $80 per share. DAS declares a 20% stock dividend. In a perfect capital market, after the dividend Sam will have A) 1,200 shares selling for $66.67 each. B) 1,020 shares selling for $80.80 each. C) 1,200 shares selling for $96.00 each. D) 1,020 shares selling for $64.00 each.