JC

This page lists questions and answers that were posted by visitors named JC.

Questions

The following questions were asked by visitors named JC.

A bullet is dropped into a river from a very high bridge. At the same time, another bullet is fired from a gun straight down towards the water. If air resistance is negligible, the acceleration of the bullets just before they strike the water A. is greate...

A tennis ball on Mars, where the acceleration due to gravity is 0.379 of a and air resistance is negligible, is hit directly upward and returns to the same level 9.50 later. How fast was it moving just after being hit? The formula is the same as we use on...

A rock is thrown vertically upward with a speed of 11.0 from the roof of a building that is 70.0 above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground? What is the speed of the rock just before it strik...

Two stones are thrown vertically upward from the ground, one with three times the initial speed of the other. Assume free fall. If the faster stone takes 9.00 to return to the ground, how long will it take the slower stone to return? If the slower stone r...

At the instant the traffic light turns green, an automobile that has been waiting at an intersection starts ahead with a constant acceleration of 2.50 . At the same instant, a truck, traveling with a constant speed of 15.4 , overtakes and passes the autom...

A 0.525 ball starts from rest and rolls down a hill with uniform acceleration, traveling 154 during the second 10.0 of its motion. How far did it roll during the first 4.00 of motion?

A rocket blasts off vertically from rest on the launch pad with an upward acceleration of 2.30 . At 10.0 after blastoff, the engines suddenly fail, which means that the force they produce instantly stops. How high above the launch pad will the rocket even...

A cannonball is fired horizontally from a 240 -high cliff toward a vertical building 540 away with an initial velocity of 90.0 . When the ball will hit the building? A) 7.00 s B) 6.00 s C) less than 6.00 s D) more than 7.00 s If it's fired horizontally, t...

A rock dropped from a small bridge encounters no air resistance and hits the pond below 1.0 s later. If it had been thrown horizontally with a speed of 10m/s , then it would have hit the water A. more than 1.0s later, since it has a greater distance to tr...

A golf ball is hit into the air, but not straight up, and encounters no significant air resistance. Which statements accurately describe its motion while it is in the air? A.On the way up it is accelerating upward, and on the way down it is accelerating d...

An athlete starts at point and runs at a constant speed of 5.40 around a round track 250 in diameter Find the component of this runner's average velocity between points A and B. Find the component of this runner's average velocity between points A and B....

I have posted this one before, but the help I received went over my head... Firemen are shooting a stream of water at a burning building. A high-pressure hose shoots out the water with a speed of 21.0 m/s as it leaves the hose nozzle. Once it leaves the h...

I have no idea!!! A river flows due south with a speed of 2.30 m/s. A man steers a motorboat across the river; his velocity relative to the water is 4.50 m/s due east. The river is 900 m wide. In which direction should the motorboat head in order to reach...

If the molecular weight of a protein is given as 90,000 are the units g/mol or simply g? I have seen mixed answers to this question. It will be 90,000 g/mol since 1 mol will have a mass of 90,000. But many simply drop the the mol and say the molecular wei...

Can anyone suggest an animal that could be considered messy or disorganized, along with a complementary animal that would be associated with tidiness or neatness? ie: curious cat, wise owl, smart pig, sly fox. Thanks. The messiest creature, aside from man...

Let a(t), v(t) and s(t) be the acceleration, velocity, and position functions respectively of a particle. If a(t)=5cos(t/2)+sint and s(0)=0, v(0)=-5. How do i find the position function s(t)?? find s(t) as the second integral of a(t) s(t)= INTINT a(t) dt...

You are going to be provided with 1 0.50 g sample of magnesium oxide. Treatment of this sample with hydrochloric acid (HCl) will take all of the MAGNESIUM in the oxide and change it into magnesium chloride, MgCl2 You will add 100 ml of 1.0 M HCl to the 0....

why is electricity able to pass through a penny, nickel, and a dime but can't pass through paper, foil, and plastic?

Algebra Riddle with PIZZAZZ "Did you hear about..."

Sorry for posting so many, but I just need to make sure I'm on the right track. Just need someone to check my working and answers. A rocket has a mass 3000kg. The fuel used in the rocket has an additonal mass of 500kg. At the launch, the rocket accelerate...

I'm having troubles with a few questions. A tennis ball is thrown vertically upwards. At the top of it's flight, it has: A. a zero speed and acceleration B. a zero speed and constant acceleration C. maximum speed and acceleration D. maximum speed but zero...

Is there any good websites which can give me something to read on "About a Boy" the novel. I have to write a supervised essay in class tomorrow about how the characters change and how they "lose or gain" something. I have a brief idea on the how I'm going...

5(2m+3)-(1-2m)=2[3(3+2m)-(3-m)] Does this have a solution? I can only get so far... Thanks

a 15-kilogram box is dragged up an incline that is 8.0 meters long and makes an angle of 15 degrees with the horizontal. If the coefficient of friction between the box and the incline is .40, calculate the amount of work done by the applied force.

Is there hidden cost with pulley systems that reduce effort?

What do you think a good third world city or a major city in a poor developing country would be a good one to write an urbanization report and trends on? I have to have a major city in the country? I just want advice if anyone knows what one would be good...

why do different compound have different colours in their visible emissions?

part B. would you expect the emissions to vary if metal flourides were used rather than metal chlorides?

Given: 90m skid mark .50 coefficient of friction between the tires and skid mark How fast is the car moving when the brakes initially applied?

The water skier in the figure is at an angle of 35degree with respect to the center line of the boat, and is being pulled at a constant speed of 15m/s . 1)If the tension in the tow rope is 90.0 , how much work does the rope do on the skier in 30.0 ? 2)How...

If your neighbor's house is 2/8 smaller than you house and the volume dimensions of your house are 13, 26 and 130 sq ft, what is the volume of your neighbor's house

Calculate the pH in a 0.00500 solution of NaOH.

Find the distance of the shotcut and the distance of the long way for two locations. find the number of seconds saved ( 2.1 and 5.8) Approximate the are of the affected region (24 and 248 Sq Ft). find the average amount of oxgen saved per second saved (10...

Please confirm if I did this correctly: What is the Principal? Principal $21250 X 10% 2,125 What is the total amount paid by the consumer? 2,125 x 3.5 years 7,437.5 +21,250.0 28,687.50

Please advise how do I get the Regular % and the Cummulative % I just need one example other wise I will lose what's left of my mind. Defect Description Qty Improperly Sized 258 Bad Seam 153 Missing Buttons 67 Fabric Flaw 22 500

In the sentence "Let's walk around." Walk is the noun or the verb? And What is "Let's"?

Ethnographic methods are to ethnological methods as: (Points : 1) the humanities are to the sciences. fieldwork is to laboratory experiments. description is to comparison. nature is to culture.

The base of the prism is a rectangle with sides 13 m and 5 m in length. Find the lateral surface and surface area of the given prism.

As part of the nation’s recovery from the Great Depression of the 1930s, the banking system was reformed in which of the following ways? A. The government paid off loans for large corporations. B. The Federal Reserve Banks were closed. C. Banks were dereg...

You are considering buying 27 silver coins that look alike, but you have been told that one of the coins is a lightweight counterfeit. Find the least number of weighings on a balance scale that you can use to be certain you have found the counterfeit coin...

I having serious problems trying to solve this equation please help me find the product matrix for this input-output and demand matrices A= [ 0.1 0.03] D= [5] [ 0.07 0.6] [10]

what freedoms were the people of Napoleon's day willing to sacrifice

The shop sold 264 inflatable rafts in 24 days. What was the average number of rafts sold each day?

The boiling point of diethyl ether, CH3CH2OCH2CH3, is 34.500 °C at 1 atmosphere. Kb(diethyl ether) = 2.02 °C/m In a laboratory experiment, students synthesized a new compound and found that when 13.85 grams of the compound were dissolved in 283.2 grams of...

Aluminum floater: A spherical shell with an outer radius R=2 cm is made of aluminum (mass density of Al is 2.7 g/cm3). How thick is the shell if the average density of the spherical object is exactly 0.5 g/cm3 ? Assume there is a vacuum in the hollow inte...

how much oxygen gas wil be produce from the decomosition of 50 grams of pottasium chlorate

An ideal string passes over a fixed pulley and carries masses M1 = 12kg and M2 = 8kg tied at its end. Calculate the acceleration of masses and tension in the string when released (g=10m/s2) I know the answers are a = 2 m/s^2 T = 96 N But I don't know how...

A cyclist in an Olympic race is moving in a circular track of radius 80 m with speed 72 km/h. He has to lean from the vertical approximately through an angle of... ANS: tan-1(1/2) How is tan-1(1/2) derived in this answer?

In the arithmetic sequence -7, -4, -1, 2,..., what term is 44?

Give the next three terms of the sequence 5, 9, 13, 17, 21, 25,... Then graph the sequence.

The fourth term of arithmetic sequence is 18 and the sixth term is 28. Give the next three terms.

Unit 2 Lesson 8Sectionalism and the Civil War Test

Answers

The following answers were posted by visitors named JC.

Y=18/22*11/6 Y=198/132 Y=3/2

c/2r=pi 2x+10=24 2x=14 x=7

I need help!!!!

Well for the first one, if its at peak of it's flight, the speed would be zero. Would the answer be B because the gravity is always constant? and for the second one, would be answr be B then? I'm thinking that there are gravitational effects occur anywher...

How do you figure out <when you have a certain # to work with in an atom > how do you come up with how many neutrons, electrons and protons in the atom from the nucleus? Please help

worked thanks...

are these countries that are growing in population though, urbanization? are these two the same city? Ho Chi Minh City (Saigon),

The water skier in the figure is at an angle of 35degree with respect to the center line of the boat, and is being pulled at a constant speed of 15m/s . 1)If the tension in the tow rope is 90.0N, how much work does the rope do on the skier in 30.0s ? 2)Ho...

Vw+b = Vb x sqrt[Mb/(Mb+Mw)] I've derived it from 0.5xMbx(Vb^2) = 0.5x(Mb+w)x(Vw+b)^2

I guess that the number of men and women doesn't matter so they're just 35 all. My answer is 35P4 + 31C6. . I used permutations for the pres~sec b'cse they have diff roles, not like the advisory committee. . Email me at ust008332@gmail if you found a bett...

I think it has something to do with proportion

Wrong!!The question is how many boys CURRENTLY attend the school. and that is 2x=108

The very fact that a woman's face is being compared to a garden throughout the entire poem.

Thanks, Scott!!

Aye that's cool were all from connections academy

I believe its C. Because more particles move with greater speed and collide more frequently due to the fact of R_Scott explanation of moving particles and collision with each other is a occurrence when particles have more energy

I promise to you the answer is 25% I got this answer correct on my exam. I am too lazy to type an explanation. Good luck. Trust ong.

Calculate the amount of heat required to raise the temperature of a 65-g sample of water from 32 ∘C to 65 ∘C. (The specific heat capacity of water is 4.184 J/(g⋅∘C).) The answer is = 9.0 * 10cube J