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Amelia
Questions (143)
In the 1950s, an experimental train that had a mass of 3.30 104 kg was powered across level track by a jet engine that produced
2 answers
690 views
During a workout, the football players at State U. ran up the stadium stairs in 61 s. The stairs are 145 m long and inclined at
1 answer
1,473 views
How long will it take a 1630 W motor to lift a 285 kg piano to a sixth-story window 16.0 m above?
6 answers
2,246 views
Using energy considerations, calculate the average force a 60.0 kg sprinter exerts backward on the track to accelerate from 2.00
2 answers
1,062 views
Boxing gloves are padded to lessen the force of a blow.
(a) Calculate the force exerted by a boxing glove on an opponent's face,
1 answer
1,436 views
Using energy considerations, calculate the average force a 60.0 kg sprinter exerts backward on the track to accelerate from 2.00
1 answer
1,263 views
A projectile is thrown upward with an initial velocity of 272 feet per second. After t seconds, its height h(t)above the ground
1 answer
1,732 views
When serving a tennis ball, the player hits it when its velocity is zero (at the highest point of a vertical toss). The racket
1 answer
3,533 views
When serving a tennis ball, the player hits it when its velocity is zero (at the highest point of a vertical toss). The racket
2 answers
558 views
You are the design engineer in charge of the crashworthiness of new automobile models. Cars are tested by smashing them into
0 answers
667 views
A 0.145 kg baseball pitched at 35.0 m/s is hit on a horizontal line drive straight back toward the pitcher at 52.0 m/s. If the
3 answers
1,437 views
A constant friction force of 15 N acts on a 70 kg skier for 20 s. What is the skier's change in velocity?
1 answer
1,516 views
Four forces act on a hot-air balloon with F1 = 1660 N and F2 = 5080 N , shown from the side in Figure 4-29. Find the magnitude
0 answers
829 views
A shopper in a supermarket pushes a loaded 36 kg cart with a horizontal force of 12 N.
(a) How far will the cart move in 3.5 s,
0 answers
1,031 views
A boat moves through the water with two forces acting on it. One is a 5.3 103 N forward push by the motor, and the other is a
1 answer
779 views
Our debating topic is 'That good news is not news.'
I am on the negative team so I am saying that good news is, in fact news. I
1 answer
850 views
2/5Q is less than or equal to -18
i am really stuck and i am not surehow to figure it out!
1 answer
409 views
I need help with writing a thesis statement for a paper on discrimination in a diverse culture
1 answer
396 views
What is the domain of f (x) = sqr root of x^2 - 5x - 14?
1 answer
582 views
How does geography affect where people live and work in Canada?
1 answer
631 views
EXTENDING THE LESSON If you add any two rational numbers, the sum is always a rational number. So, the set of rational numbers
2 answers
1,911 views
A furniture store sells recliners at a 70% mark-up (based on price). If the recliner costs the store $240, what price will they
4 answers
2,201 views
A furniture store sells recliners at a 70% mark-up (based on price). If the recliner costs the store $240, what price will they
2 answers
626 views
Can you give me some help with this question im not sure how to even start
in a reaction A to P the mass of A at any given time T
1 answer
437 views
Can you give me some help with this question im not sure how to even start
in a reaction A to P the mass of A at any given time T
1 answer
434 views
The Moon's period of revolution around the Earth is 27.3 d. How far away is the moon?
1 answer
2,955 views
keep getting stuck
for integrate e^(bx) cos x i get = cos x e^bx/b - int -sin x e^bx/b = cos x e^bx/b - -sin x e^bx/b^2 - int -
1 answer
440 views
i keep getting stuck and i think im missing something
integrate by parts e^(bx) cos x dx thanks
1 answer
458 views
Integration by substitution
ive been given this equation int x^2(x^3-6)^3 dx using u = x^3 -6 but i don't understand how to do it
1 answer
391 views
Integration By substitution
ive been given this equation int x^2(x^3-6)^3 dx using u = x^3 -6 but i don't understand how to do it
1 answer
361 views
ive calculated the amount of change for an enzyme controlled reaction as 1.5625 x 10^-8 mol.min-1 and ive been asked to find the
0 answers
530 views
ive calculated the amount of change for an enzyme controlled reaction as 1.5625 x 10^-8 mol.min-1 and ive been asked to find the
0 answers
516 views
ive calculated the amount of change for an enzyme controlled reaction as 1.5625 x 10^-8 mol.min-1 and ive been asked to find the
0 answers
516 views
differentiate using product, chain and quotient rule
ln x / 5x-7 and e^x / 2x^3 - 1 could you help me out with the first and just
1 answer
716 views
How do i use energy coupling to work out how many molecules of ATP dG =-55 kJ/mol needed to make a peptide bond dG = +25 kJ/mol
i
1 answer
514 views
How do i use energy coupling to work out how many molecules of ATP dG =-55 kJ/mol needed to make a peptide bond dG = +25 kJ/mol
i
1 answer
500 views
with amino acid ionisation staes do the r groups/side chains deprotonate first or the nh3+ group im talking about aspartic acid
1 answer
1,152 views
differentiate from first principles
y=1/x^2 i get to this then i get stuck f(x+h)-f(x) = 1/(x+h)^2 - 1/x^2 = x^2 - x^2 -2xh -h^2
2 answers
513 views
I am doing a presentation on Greenland. I decided to dress up like a Greenlandic. I have a coat that would work, but I'd like to
1 answer
507 views
Is ice inorganic and why?
1 answer
420 views
Hi guys, would appreciate some help with this problem:
When a light turns green, a car speeds up from rest to 50.0 mi/h with a
2 answers
2,791 views
Hi,
Could you please have a look at the satelite image of Gangotri Glacier? it can be found if you type: " Retreat of the
0 answers
574 views
Does anyone know any songs that have a history behind them? (ie American Pie)
http://en.wikipedia.org/wiki/Ode_to_Billie_Joe =)
0 answers
410 views
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