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Amelia
Questions and answers by
Amelia
Questions (141)
Does anyone know any songs that have a history behind them? (ie American Pie)
http://en.wikipedia.org/wiki/Ode_to_Billie_Joe =)
1 answer
377 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
2 answers
527 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
4 answers
2,714 views
Is ice inorganic and why?
1 answer
390 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
2 answers
478 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
3 answers
460 views
with amino acid ionisation staes do the r groups/side chains deprotonate first or the nh3+ group im talking about aspartic acid
2 answers
1,117 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
440 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
472 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
2 answers
683 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
1 answer
477 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
1 answer
474 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
1 answer
493 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
324 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
357 views
i keep getting stuck and i think im missing something
integrate by parts e^(bx) cos x dx thanks
1 answer
414 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
406 views
The Moon's period of revolution around the Earth is 27.3 d. How far away is the moon?
4 answers
2,886 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
404 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
402 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
3 answers
577 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
5 answers
2,133 views
EXTENDING THE LESSON If you add any two rational numbers, the sum is always a rational number. So, the set of rational numbers
4 answers
1,849 views
How does geography affect where people live and work in Canada?
3 answers
587 views
What is the domain of f (x) = sqr root of x^2 - 5x - 14?
2 answers
542 views
I need help with writing a thesis statement for a paper on discrimination in a diverse culture
1 answer
369 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
374 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
2 answers
798 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
2 answers
738 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,
1 answer
986 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
1 answer
790 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?
3 answers
1,481 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
4 answers
1,382 views
You are the design engineer in charge of the crashworthiness of new automobile models. Cars are tested by smashing them into
1 answer
627 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
3 answers
520 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
3 answers
3,468 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
4 answers
1,667 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
1,211 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,
3 answers
1,366 views
Using energy considerations, calculate the average force a 60.0 kg sprinter exerts backward on the track to accelerate from 2.00
3 answers
1,015 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?
7 answers
2,196 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
3 answers
1,412 views
A 18.0-kg cart is moving with a velocity of 7.30 m/s down a level hallway. A constant force of -13.0 N acts on the cart and its
2 answers
764 views
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
3 answers
634 views
A steel ball has a mass of 3.8 kg and rolls along a smooth, level surface at 56 m/s.
(a) Find its kinetic energy. 1 I got 404.32J
2 answers
499 views
Mary weighs 450 N and she walks down a flight of stairs to a level 4.50 m below her starting point. What is the change in Mary's
3 answers
1,344 views
A 17-kg rock is on the edge of a 103-m cliff.
(a) What potential energy does the rock possess relative to the base of the cliff?
4 answers
1,278 views
A steam iron draws 6.5 A when connected to a potential difference of 120 V.
(a) What is the power rating of this iron? 1 W (b)
2 answers
657 views
Four resistors are connected to a battery with a terminal voltage of 12.0 V, (R1 = 40.0 , R2 = 80.0 , R3 = 140.0 and R4 = 15.0 )
3 answers
1,490 views
A net charge of 47 mC passes through the cross-sectional area of a wire in 19.0 s.
(a) What is the current in the wire? 1 A (b)
3 answers
989 views
A hair dryer draws a current of 9.7 A.
(a) How much charge passes through the hair dryer in 3.5 min? 1 C (b) How many electrons
4 answers
2,522 views
How much charge passes through a cross-sectional area of a copper wire in 0.8 s if I = 3.5 A?
1 C
3 answers
1,078 views
A color television has a power rating of 325 W. How much current does this set draw from a potential difference of 120 V?
1 . A i
4 answers
4,521 views
A color television has a power rating of 325 W. How much current does this set draw from a potential difference of 120 V?
1 . A i
1 answer
396 views
A steam iron draws 6.5 A when connected to a potential difference of 120 V.
(a) What is the power rating of this iron? 1 W (b)
5 answers
2,133 views
Calculate the cost of operating a 65 W light bulb continuously for a 30-day month when electrical energy costs $0.23/kW·h.
$ 1
3 answers
782 views
The operating potential difference of a light bulb is 120 V. The power rating of the bulb is 105 W. Find the current in the bulb
4 answers
1,868 views
(a) Two microwave frequencies are authorized for use in microwave ovens: 900 and 2560 MHz. Calculate the wavelength of each.
1 cm
6 answers
6,309 views
Citizen's band (CB) radio utilizes frequencies between commercial AM and FM. What is the frequency of a 11.34 m wavelength CB
3 answers
1,088 views
Electromagnetic radiation having a 12.0 µm wavelength is classified as infrared radiation. What is its frequency?
1 Hz i got
3 answers
783 views
TV-reception antennas for VHF (channels 2 through 13) are constructed with cross wires supported at their centers, as shown in
3 answers
2,044 views
What is the wavelength of an electron moving at 2.60% of the speed of light?
1 m
3 answers
693 views
(6y)/(y^2+y-72 divided by (y^6)/(8-y).
1 answer
293 views
When you are focusing an object under the microscope, explain why some parts are in focus and some part are out of focus?
4 answers
1,439 views
Why is it that you cannot use the largest objective for some slides?
1 answer
302 views
Damaraland mole-rats are relatives of naked mole-rats. In their clans, too nonbreeding individuals of both sexes cooperatively
1 answer
388 views
assume 8 males audition,
one of them being Miles, 6 females audition, one of them being Jackie, and 4 children audition. The
4 answers
1,295 views
Consider the collisions between a car and a truck whose weight is much heavier than the car (M ≫ m). Friction is so small that
4 answers
2,981 views
b) If the car is moving much faster than the heavier truck when they collide, what best describes the size (or magnitude) of the
3 answers
1,418 views
After a day of testing race cars, you decide to take your own 1502.5 kg car onto the test track. While moving down the track at
1 answer
425 views
The average height of Al, Anne, and Allan is 66 inches. If Arnel is included in the group, their average height becomes 70
3 answers
376 views
Czarina is working part time at a pastry shop baking cupcakes. If she works for 30 hour in one week on the average, how many
1 answer
401 views
What is the difference between "weighted mean" and "arithmetic mean?"
2 answers
761 views
Czarina is working part time at a pastry shop baking cupcakes. If she works for 30 hours in one week on the average, how many
2 answers
571 views
An elevator accelerates upward at 1.2 m/s2. The acceleration of gravity is 9.8 m/s2 . What is the upward force exerted by the
3 answers
1,989 views
007 (part 1 of 2)
An elevator accelerates upward at 1.2 m/s2. The acceleration of gravity is 9.8 m/s2 . What is the upward force
4 answers
786 views
An inventive child named Chris wants to reach an apple in a tree without climbing the tree. Sitting in a chair connected to a
4 answers
7,937 views
Suppose a distant world with surface gravity of 7.12 m/s2 has an atmospheric pressure of 7.48 104 Pa at the surface.
(a) What
3 answers
800 views
A collapsible plastic bag contains a glucose solution. If the average gauge pressure in the vein is 1.21 103 Pa, what must be
2 answers
780 views
the same alkali(sodium hydroxide)can be found in both hair gel and oven cleaner.explain why it is safe to put hair gel on your
1 answer
382 views
It takes 16s to raise a 2800lb car and the supporting 650lb hydraulic car-lift platform to a ht of 6.5 ft. Knowing that the
2 answers
524 views
Help!! Can you check my answers?
1. The small boat was scudding into the open sea with a full sail. (1 point) getting stuck
4 answers
1,240 views
You pay 3.3 cents per minute for long-distance phone calls on your phone. Your phone bill is $3.40. Write and solve an equation
2 answers
822 views
In the number 7,725, which places contain digits where one digit is ten times as great as the other?
1 answer
447 views
Writing with exponents
2x2x2
9 answers
2,061 views
A scuba diver dives to a depth of 50 feet, then rises 15 feet, sinks 12 feet, then rises 20 feet. Write an expression to
7 answers
2,753 views
The question says: when .422 g of phosphorus is burned, .967 g of a white oxide is obtained. Determine the empirical formula of
2 answers
974 views
Which solution would best help control pollution in Lake Tai while keeping Wuxi strong?
People should move away to make more
10 answers
886 views
There are 40 students in a class.14 of these students are girls. What percentage of the class are girls?
1 answer
434 views
A street light is at the top of a 16 ft pole. A 5 ft tall girl walks along a straight path away from the pole with a speed of 3
2 answers
1,074 views
m1 = 1.7 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 60 N/m) as shown in
4 answers
909 views
= 1.7 kg block slides on a frictionless horizontal surface and is connected on one side to a spring (k = 60 N/m) as shown in the
2 answers
923 views
Why is there no vertical asymptote on
F(x) = x/(x^2+1) What i learned is that to find vertical asymptote you have to set the
5 answers
497 views
Determine the quadrant in which an angle, θ, lies if θ = 8π / 7
a. 3rd quadrant b. 1st quadrant c. 4th quadrant d. 2nd
3 answers
2,024 views
Determine the quadrant in which an angle, θ, lies if θ = 5.40 radians.
a. 4th quadrant b. 3rd quadrant c. 2nd quadrant d. 1st
5 answers
2,427 views
Determine the quadrant in which a 130° angle lies.
a. 4th quadrant b. 1st quadrant c. 3rd quadrant d. 2nd quadrant
3 answers
744 views
A lawn is 3 m by 5 m there is a path 1 m wide laid around the lawn. Find the area of the lawn (Please help)
2 answers
588 views
A swimming pool is being emptied and the amount of water remaining in the pool after t minutes after emoting commences is given
1 answer
446 views
Explain why n2h4 acts as bronsted lowry base but n20 does not
1 answer
688 views
Read the following sentences from "The Swimming Contest"
"Who the hell fired that shot?" "My gun went off," one of the boys said.
4 answers
4,702 views
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