# Posts by Madi

Total # Posts: 111

**Chemistry**

An experiment requires 0.3 M NH3(aq). The stockroom manager estimates that 15 L of the base is needed. What volume of 15 M NH3(aq) will be used to prepare this amount of 0.3 M base? Answer in units of mL

**Math**

possibilities are A) 3/70 B) 3/75 C) 1/35 D) 2/70

**Math**

A prize machine randomly dispenses small toys. There are 15 prizes left: 5 bouncy balls, 3 toy cars, 2 stickers, and 5 dinosaurs. Kai gets 2 prizes. What is the probability that they are both toy cars?

**Math**

A prize machine randomly dispenses small toys. There are 1515 prizes left: 55 bouncy balls, 33 toy cars, 22 stickers, and 55 dinosaurs. Kai gets 22 prizes. What is the probability that they are both toy cars?

**Math**

sorry,3 times

**Math**

If you roll a six-sided die times, how many possible outcomes are there?

**Chemistry**

An empty aerosol-spray can at room temperature (20 ?C) is thrown into an incinerator where the temperature reaches 458?C. If the gas inside the empty container was initially at a pressure of 1 atm, what pressure did it reach inside the incinerator? Assume the gas was at ...

**Math**

50 is what percent of 125? ___% I got 2.5 but I know for a fact that's not write cause I checked.

**CHEMISTRY: HESS'S LAW need help! **

I'm just overly confused on how to begin this especially with the fractions... please show step by step if you could. Quiz very Soon! Example A: H2(g)+1/2 O2 (g) ----> H2O(l) ... ?H= -285.8 kJ N2O5(g) + H2O(l) -----> 2HNO3(l) ?H= -76.56 kJ 1/2 N2(g) + 3/2 O2(g) +1/2 ...

**Math**

*.9%, sorry

**Math**

it says .9, I got .324 but it said it was wrong

**Math**

36 is .9% of what number?

**Science**

well, lets think. a star is also a what...

**Math**

Thanks, I didn't know how to set it up

**Math**

There are 144 people in an audience. The ratio of adults to children is 5 to 3. How many are adults? PLEASE HELP!

**Chemistry**

Sarin is a nerve gas with a chemical formula of C4H10FO2P. What is the mass of one molecule of sarin?

**6TH GRADE MATH**

Write an equation that includes division that relates the number of minutes a sperm whale can stay under water.🤔

**physics**

A(n) 0.251 kg soccer ball approaches a player horizontally with a speed of 15.8 m/s. The player illegally strikes the ball with her hand and causes it to move in the opposite direction with a speed of 27.3 m/s. What is the magnitude of the impulse delivered to the ball by the ...

**physics**

A(n) 23000 kg freight car is rolling along a track at 2.8 m/s. Calculate the time needed for a force of 1960 N to stop the car. Answer in units of s.

**physics**

Two students on roller skates stand face-toface, then push each other away. One student has a mass of 95 kg and the second student 60 kg. Find the ratio of the magnitude of the first student’s velocity to the magnitude of the second student’s velocity.

**physics**

why , regardless of the magnitude of the initial velocity, the maximum horizontal displacement for a projectile occurs when the angle is 45 degrees. Specifically, what happens when the angle is increased or decreased. How would you mention vector components and also ...

**5th grade math**

3/8 orange 8 green 12 orange 12 red

**Physics**

A block of mass 4 kg, which has an initial speed of 2 m/s at time t = 0, slides on a horizontal surface. Find the magnitude of the work that must be done on the block to bring it to rest. Answer in units of J. If a constant friction force of magnitude 5 Newtons is exerted on ...

**Physics**

A 4.17 g bullet moving at 506.1 m/s penetrates a tree trunk to a depth of 4.64 cm. a) Use work and energy considerations to find the magnitude of the force that stops the bullet. Answer in units of N. b) Assuming that the frictional force is constant, determine how much time ...

**Physics**

The efficiency of a pulley system is 47 percent. The pulleys are used to raise a mass of 47 kg to a height of 7.0 m. The acceleration of gravity is 9.81 m/s 2 . What force is exerted on the rope of the pulley system if the rope is pulled for 28 m in order to raise the mass to ...

**physics**

A 20 g bullet is accelerated in a rifle barrel 45 cm long to a speed of 354 m/s. Use the work-energy theorem to find the average force exerted on the bullet while it is being accelerated. Answer in units of N.

**Physics**

A 7159 N piano is to be pushed up a(n) 2.26 m frictionless plank that makes an angle of 25.6 ◦ with the horizontal. Calculate the work done in sliding the piano up the plank at a slow constant rate. Answer in units of J.

**Physics**

The amplitude is the 0.25m distance you pull the spring, plug that into the equation you said and it should work, good luck!

**Math**

For the depth of water on Friday, 16 January 1998, the periodic function is: y = 1.05 sin 2pix/11.72 + 1.55 1.05 is the 'a' value 2pi/11.72 is the 'b' value 1.55 is the 'd' value we were told not to take into consideration the 'c' value in our ...

**Physics**

We have to work out the accepted value of a roller coaster cart (taking into account friction) when the mass is modified Here is the answer I got for 56.71 grams: 0=∆EGP+∆EK+Fd 0=mg(hf-hi )+1/2 m(v^2-u^2 )+Fd 0=0.05671 × 9.8 (0.075-0.786)+1/2× 0.05671 (...

**Chemistry**

What would have happened if Rutherford shot negative particles instead of positive particles in his gold-foil experiment? What would have happened if the nucleus in the gold-foil was actually negative, rather than positive, in his experiment?

**History**

Why was Ireland experiencing poverty in the late 1700's and early 1800's?

**Maths**

From looking at a periodic function, we had to decide on the equation for it. I got: y = 1.05 sin x2pi/11.72 + 1.55 1.05 is the 'a' value of the equation 2pi/11.72 is the 'b' value for the equation 1.55 is the 'd' value of the equation we were told not ...

**History**

Why was Ireland experiencing poverty in the 1800's?

**Maths**

does that mean it'll be above 1.7m from 6:16pm to 11:35pm as well?

**Maths**

I understand how you got 0.1433 and 2.9982 from using the CAST diagram, I'm just wondering why you need to do that? And I'm not sure how you converted 0.2673 and 5.5926 into hours and minutes

**Maths**

From looking at a periodic function, we had to decide on the equation for it. I got: y = 1.05 sin x2pi/11.72 + 1.55 1.05 is the 'a' value of the equation 2pi/11.72 is the 'b' value for the equation 1.55 is the 'd' value of the equation we were told not ...

**math**

Find the periodic payment R required to amortize a loan of P dollars over t years with interest charged at the rate of r%/year compounded m times a year. (Round your answer to the nearest cent.) P = 30,000, r = 5, t = 20, m = 4

**statistics**

A credit card company estimates that the average credit card balance of Americans is $3,210. A statistics student wants to know whether this is true for citizens of her home town. Which hypothesis test would be most appropriate for addressing this question? One sample z-test ...

**Social Studies**

Can someone help me? I need it ASAP

**Social Studies**

1. What dynasty ruled the Korean peninsula from AD 668 to AD 935? Meiji Qin Silla*** Tokugawa 2. What type of government ruled North korea after World War II communist**** democratic dictatorship oligarchy 3.Both Japan and the Koreas been influenced by ________ the Tokugawa a ...

**Physics**

A plane is flying 250 m/s west with a crosswind of 25 m/s north affecting the flight. What is the magnitude and direction of the plane?

**Exponents**

Hi just curious when evalutating 5^-2 Would the answer be 25 Or would it be 0.4 = 2/5 I am lost

**math 4th grade**

372

**Algebra**

If 4 notebooks weigh 2.8 pounds how do 6 notebooks weigh

**Math**

A ferris wheel has a diameter of 10 m and takes 24 sec to make one revolution. The lowest point on the wheel is 1 m above the ground. (4 marks) a. Sketch a graph to show how a rider's height above the ground varies with time as the ferris wheel makes a rotation. Assume the...

**Math and Music**

I have to do a presentation on how math and music relate. I have found some things and facts but everything is so complicated. If someone could help explain to me how I can narrow my topic down and make a presentation that is simple but effective. It can be anything within the...

**Math palette of problems**

If 2/9 gallon of water fills a bucket 3/5 full, how many gallons of water are needed to fill the bucket?

**Physics**

A block is sliding along a frictionless surface at a speed of 3.6 m/s. It hits a spring of spring stiffness constant k = 150 N/m. How far has the spring compressed when the block comes to a stop?

**Physics**

Paige and Julia are playing volleyball. Paige is in spiking position when Julia gives her the perfect set. The 0.226-kg volleyball is 2.29 m above the ground and has a speed of 1.06 m/s. Paige spikes the ball, doing 9.89 J of work on it. Determine a) the total mechanical ...

**Chemistry**

Six sig figs.

**geometry**

36 units

**math**

least to greatest 1/8,1/10,1/7

**circle geometry**

The correct answer is 301. Steve, in the first line is 129, not 29... and you shouldn't work with decimals because in the end the ugly dominator simplifies with the numerator.

**Biology! pleaseee helppp**

please help

**Biology! pleaseee helppp**

About 70% of the human population can taste the bitter chemical phenylthiocarbamide (PTC), which is found in foods like broccoli. The allele, T, for tasting PTC is dominant over the allele, t, for not tasting it. Calculate the allele frequencies using the Hardy-Weinberg ...

**Physics**

A 59-kg housepainter stands on a 16-kg aluminum platform. The platform is attached to a rope that passes through an overhead pulley, which allows the painter to raise herself and the platform. (Ignore the mass of the pulley and any friction in the pulley.) (a) With what force ...

**Physics**

A box of mass m2 = 3.1 kg rests on a frictionless horizontal shelf and is attached by strings to boxes of masses m1 = 1.6 kg and m3 = 2.6 kg as shown below. Both pulleys are frictionless and massless. The system is released from rest. After it is released, find the tension in ...

**Biology**

Which of the following statements correctly compares the functions of a plant's roots and stem? The stem contains a high percentage of cells that provide structural support, unlike the roots. The stem is the first part of the plant to emerge from a seed, followed by the ...

**math**

i don't get it...

**Government**

Marbury v Madison

**Government**

This case came about because President Marbury refused to honor the last-minute judicial appointments of Pres. Madison. A) True B) False 2. Marbury wanted the courts to issue of writ of mandamus, a court order forcing Jefferson to give him his commission. A) True B) False 3. ...

**government**

Which of the following is NO LONGER necessary for the right to vote?A) RegistrationB) CitizenshipC) Residency D) Land Ownership

**Spanish**

Fill in the blanks with words from the box. estés molesta plástico recicle sea Es posible que reciclar (1) una de las mejores formas de proteger el medio ambiente. Quizás no te das cuenta (you're not aware), pero reciclar vidrio, aluminio y (2) ahorra...

**Spanish**

Fill in the blanks with the subjunctive form of the verbs. 1. Me alegro de que el ecoturismo (ser) un buen negocio (business). 2. Es una lástima que tú no (reciclar) el vidrio. 3. No crees que ellos (querer) usar energía solar. 4.Ojalá todos ...

**Biology**

The Kingdom Monera has been separated into two domains, the Archaea and the Bacteria. Which of the following was most important in prompting scientists to change the way these organisms were classified? a.)Major differences were discovered in the structure and operation of the...

**communication**

I need to complete an outline and thesis statement on "Two female Chihuahuas living in the same household.I don't understand how and what information to write.

**science**

Two mineral samples have the same mass. Wich of the following statements is therefor true

**Math Riddle-Algebra With Pizzaz**

Page 157 how do you graph them

**Math**

How does ruling out possible answers help you find the correct answer

**Math**

Simplify the Ratio 4in : 1 yd

**Spanish**

Please unscramble these Spanish words mincara, carbaa, tauerdis, tagsur, suar, qarilaul, caars, sotrecnat, piormcatr, bajra, gelral.

**science**

The enzyme that opens up the DNA double helix during replication.?

**science**

DNA is copied during a process called.?

**math**

$80 $110 $130 $160 $210 $650

**physics**

A mass was dropped from a height of 20m. (a) find its speed at impact. (b) what can you say about the initial GPE of the mass and the KE of the mass just as it hits the ground?

**physics**

From a tree that is 15m tall, a fruit of mass 2kg falls to the ground. (a) find the initial GPE (b) find the speed at impact (c) find the KE at impact (d) how much energy was lost to heat and sound after the mass came to rest?

**physics**

A mass of 2kg was thrown straight up with a speed of 15m/s. (a) find the initial KE (b) how high does the mass rise? (c) what is the GPE of the mass at the highest point?

**chemistry**

calculate the mass in grams of .354 moles of NH3

**algebra 2**

what is the quadratic function that has the roots (4+3i) and (4-3i)

**math**

How many people were at a party if There were 105 handshakes at a party and if each person at the party shook hands with exactly once with every other person. The answer is 15. How do I write the problem?

**Math PIZZAZZ**

it cant be halo...there are 14 answers

**9th grade**

What is an example of natural selection in everyday life?

**Art**

okay, ummm my teacher wants us to write down what a proportion and scale isand what an economy is in art. So what are those????!!! I'm so confused! :P plz help!

**math**

ummm how old r u?

**Physics**

highway saftey engineers build soft barriers so that cars hittingthem will slow down at a safe rate. a person wearing a saftey belt can withstand an acceleration of 300 m/s how thick should barriers be to safely stop a car that hits a barrier at 110 km/h

**physics**

a plane travels 5.0 x 10^2 while being accelerated uniformly from rest at the rate of 5.0 m/s. what final velocity does it attain?

**Physics**

an astronaut drops a feather from 1.2 m above the surface of the moon. if the acceleration of the gravity on the moon is 1.62 m/s down , how long does it take the feather tho hit the surface

**physical science**

The density of copper is 8.92 g/cm (cubed). If you plotted the mass of copper in grams versus the volume in cubic centimeters, what would the slope of the line be?

**algebra2**

Ms. Sue is only trying to tell you to do your homework!

**Government Check**

^^agreed.

**5th grade Math**

?????? i don't get it

**Physical Science**

30,000N work=force times distance 300 times 100= 30,000

**riddles**

is this home work

**CIVICS DUE TOMARROW PLZ ANSWER**

umm this doesn't answer my question. I can not find it on the website.

**chemistry home work**

2 examples on sediment plz reply fast...

**algebra**

in my workbook it says give the opposite of each expression and the problems are: -10t+21 -x+2z there are alot more but i thought if someone explained a couple of these to me maybe id understand the rest. idk just please help me!!!

**Physics**

Predators

**Basic Math**

composite means that the # can be divided by one and it's self. so that means the anser is B

**spelling**

It says find 1 vowel and 1 consonat