# Posts by zac

Total # Posts: 149

**Physics**

A 86.0-kg man is riding an escalator in a shopping mall. The escalator moves the man at a constant velocity from ground level to the floor above, a vertical height of 5.50 m. What is the work done on the man by each of the following forces?

**math**

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together? This the ans 2 hours and 24 minutes but how did they work it out?

**math**

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together? This is the ans. 2 hours and 24 minutes But how they work it out?

**math**

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together?

**MATH**

Find each percent of markup. (a) The wholesale price is $34. The retail price is $42.50.

**us history**

what events led to u.s. expansion during 1895-1920?

**algebra 2**

Which binomial is a factor of f(x) = x4 - 27x2 -14x + 120? (x-4) (x-2) (x + 5) (x + 6)

**algebra 2**

Which binomial is a factor of f(x) = x4-27x2-14x + 120?

**algebra 2**

thank you this make way more since now

**algebra 2**

oh sorry x3-4x2-3x+18=0

**algebra 2**

Factor x3 4x2 3x + 18 = 0, given that 3 is a zero.

**algebra**

yeh but my homework has +-2 and +-1 as answers abd i can only choose one

**algebra**

x3 + 8x2-x-6 = 0?

**algebra**

According to the rational root theorem, which is not a possible rational root of x3 + 8x2 x 6 = 0?

**chemistry**

25 ml HCl x 1L/1000mL x .200HCl/1L = .005 mol HCl. Using the balanced equation from this, how many moles of NaOh will you need to completely neutralize the HCl?

**PHYSICS**

A student (m = 63 kg) falls freely from rest and strikes the ground. During the collision with the ground, he comes to rest in a time of 0.0170 s. The average force exerted on him by the ground is +16500. N, where the upward direction is taken to be the positive direction. ...

**PHYSICS**

A stream of water strikes a stationary turbine blade horizontally, as the drawing illustrates. The incident water stream has a velocity of +18.0 m/s, while the exiting water stream has a velocity of -18.0 m/s. The mass of water per second that strikes the blade is 69.0 kg/s. ...

**PHYSICS**

A model rocket is constructed with a motor that can provide a total impulse of 25.5 N · s. The mass of the rocket is 0.213 kg. What is the speed that this rocket achieves when launched from rest? Neglect the effects of gravity and air resistance.

**algebra**

a public television station set a goal of $350,000 in pledges during a certain month. the total pledged was $525,000. What percent of the station's goal was reached?

**physics**

A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 26 m/s, the block hangs vertically down. But when the van maintains this same speed around an unbanked curve (radius = 135 m), the block swings toward the outside of the ...

**arithmetic**

0.2 in extended form

**physics**

A jogger accelerates from rest to 2.7 m/s in 2.2 s. A car accelerates from 39.0 to 44.0 m/s also in 2.2 s. (a) Find the acceleration (magnitude only) of the jogger. (b) Determine the acceleration (magnitude only) of the car. (c) Does the car travel farther than the jogger ...

**physics**

In getting ready to slam-dunk the ball, a basketball player starts from rest and sprints to a speed of 6.2 m/s in 1.9 s. Assuming that the player accelerates uniformly, determine the distance he runs.

**physics**

An 18-year-old runner can complete a 10.0 km course with an average speed of 4.51 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.31 m/s. How much later (in seconds) should the younger runner start in order to finish the course at the same time...

**math**

What is the mean mediam and mode for 64,75,62,90,81,52,80,99,100,65,75,61,0,106,72,70,80,92,90,102

**algebra 2**

A bag contains 4 white marbles, 3 red marbles, 2 green marbles, and 1 yellow marble. what is the probability of reaching in the bag and randomly choosing a white marble?

**math**

how do i write 53 hundredths as a decimal.

**algebra**

pleae help solve: 3x-5y=7 and 5x-2y=-1

**Biochemistry**

explain why a strong acid or base can denature an enzyme explain how varying pH influenced the rate of the catalase reactions and explain why. explain the influence of temperature in excess of 50 degrees C on the influence of most enzyme controlled reactions. explain why this ...

**Chemistry**

Explain open and closed system with respect to equilibrum.

**Chemistry**

what effect does a catalyst have on.. a) energy of the reactants b) enthalpy change of the reaction

**Chemistry**

What are the products of nitrogen dioxide and methane?

**Math**

If you have a graph with the x-axis as the days of the month, and the y-axis as stock price.... Then, how to do you figure out the percentage drop in stock price for each week?

**World History**

Why would people choose an extremist form of government(either ultraliberal or ultraconservative)to rule over them?

**World History**

thank you

**World History**

Please help i would highly appreciate it

**World History**

PLEASE HELP I AM IN DANGER OF FAILING

**World History**

Why were Wilson's 14 Points not accepted by other members of the paris peace conference?

**World History**

Thank you so much your a life saver have a great evening!!

**World History**

What were the goals of "The Big Four"?

**CHEMISTRY**

For the alcohol functional group, why is the "H" not acidic and the "OH" not basic?

**ms sue-Geography**

thanks so much for finding the links for me and taking the time to help. it has helped alot . thanks again!

**Geography**

i need to label a diagram of the drainage basin of the River Tees. the words i have got to use are:- Tributary Mouth Confluence Source Reservoir Also i need to colour the diagram to show the relief of the drainage basin. A)Shade the river and its tributaries in blue B)Shade ...

**music**

thanks ms sue your a star!

**us history**

how to write a bill

**science**

explain how energy is stored in and released from atp

**unsramble words**

lidcctaena neegalr hicaypls rictapcal riltapa tuacfal

**Global warming**

i am stuck and tired! help me

**physics**

what physics are involved in the 100 meter dash