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Would the first derivative of
R(t)=9t[(t-4)^3/2.718] be R'(t)=3.311258278(3(t-4)^2(t)+(t-4)^3) and the second derivative be
2 answers
497 views
A brand new stock is also called an initial public offering. This model predicts the percent overvaluation of a stock as
2 answers
524 views
I did an experiment where I had to measure how fast water flowed out of a container at different times and with different
2 answers
651 views
I have a data table and I graphed the data. I have to find the slope of a tangent at t=0. Would the slope just be zero?
3 answers
359 views
I did an experiment where I had to measure how fast water flowed out of a container at different times and with different
3 answers
494 views
The earth's magnetic field
a) is slightly off centre compared to the Earth's rotational axis of rotation b) has its magnetic
1 answer
650 views
The earth's magnetic field
a) is slightly off centre compared to the Earth's rotational axis of rotation b) has its magnetic
4 answers
1,334 views
what is the role of a commutator in a DC motor?
3 answers
522 views
Consider the function
f (x) = 2x^3 - 3x^2 - 72x + 7 Find and classify the critical points. Identify the intervals of increase and
3 answers
1,560 views
What is the monomer and polymer structure of DNA?
3 answers
490 views
A room is a square with integer dimensions. it is made 3 feet wider and 2 feet deeper. the increase in area is 46 square feed.
2 answers
507 views
1. What happens to the force required for an object to maintain circular motion if the period is halved (goes around twice as
1 answer
673 views
1. A ball is launched from a cliff with an initial velcity of 10 m/s at an angle of 40 degrees above horizontal. If the ball
3 answers
581 views
how might life be different if static friction did not exist? give three examples and reference formulas to support your answers
1 answer
490 views
1. A ball is launched from a cliff with an initial velcity of 10 m/s at an angle of 40 degrees above horizontal. If the ball
1 answer
450 views
1. What happens to the force required for an object to maintain circular motion if the period is halved (goes around twice as
2 answers
540 views
how might life be different if static friction did not exist? give three examples and reference formulas to support your answers
1 answer
497 views
In projectile motion, how would you find the final velocity of the object just before it hits the ground
a) find the second
3 answers
863 views
1. the applied force on a stationary object is less than the maximum force of static friction. Which of the statements are false
3 answers
528 views
1. what happens to the force required for an object to maintain circular motion if the period is halved (goes twice as fast
1 answer
639 views
I am supposed to fill in the blanks without a word bank.
1. I you push a crate with 40 N of force at an angle of 30 degrees and
2 answers
521 views
fill in the blank ( Energy and momentum unit)
1. the work done to stretch a spring is not equal to the to force multiplied by
2 answers
748 views
Use g=10 N/kg in this assignment.
1. What is the gravitational energy (relative to the unstretched surface of the trampoline) of
2 answers
624 views
Use g=10 N/kg in this assignment.
1. What is the gravitational energy (relative to the unstretched surface of the trampoline) of
5 answers
3,421 views
A sumo wrestler originally jumps 10 cm above a trampoline but has the same total energy of a small ball that was 200 cm higher
4 answers
832 views
How would I answer number 3?
1. A sumo wrestler originally jumps 10 cm above a trampoline but has the same total energy of a
4 answers
1,836 views
A 60.0 kg girl stands up on a stationary floating raft and decides to go into shore. She dives off the 180 kg floating raft with
2 answers
683 views
a child throws a ball in a net where it gets stuck. Does the motion of this ball defy the law of conservation of momentum?
1 answer
430 views
1. A 15 kg boy falls out of his bed at a height of 0.50 m. What is the amount of gravitational potential energy lost by the boy?
5 answers
4,453 views
1. You are looking into a current carrying solenoid and notice that the compass needle indicates that you are at the south end
2 answers
536 views
1. if the magnetic field is 2.1 m from a current carrying wire is 7.1x10^-5 T, what is the current flowing through the wire?
2.
4 answers
1,249 views
Two parallel wires are carrying current. If the currents are in the same direction, what is the interaction between the two
2 answers
827 views
A beta particle (fast moving electron) is released by a nuclear decay and starts travelling at 1.5x10^6 m/s [NΘE] in the
3 answers
679 views
What is a charge dipole a basic model of?
would it be a magnet?
1 answer
456 views
all electric field lines start on positive charges. explain why this makes sense.
1 answer
362 views
Why would you have to subtract the heat capacity of the calorimeter when calculating the heat of the reaction?
1 answer
399 views
Why would you have to subtract the heat capacity of the calorimeter when calculating the heat of the reaction?
1 answer
357 views
explain whether using solid sodium hydroxide pellets rather than aqueous sodium hydroxide would alter the enthalpy
2 answers
492 views
If the electric field near a proton is 9.00 x 10^-3 N/C, what is the distance from the proton?
5 answers
904 views
The escape velocity on the moon is:
a) 5.64x10^6 m/s b) 1.68x10^3 c) 160 m/s d) 2.38x10^3 m/s
3 answers
390 views
Would the answer be a?
Which two forces balanced in the Millikan oil drop experiment a) electric and gravitational b) electric
2 answers
711 views
Would the answer be c?
The electrical potential 10 cm from an electron is: a) 1.4x10^-8 V b) 1.4x10^-10 V c) 1.4x10^-7 V d)
4 answers
826 views
1. which of the following is not true about magnetic field lines
a) mag. field lines flow from North to South inside the magnet
3 answers
1,186 views
A 1000 kg rocket without an internal propulsion system is launched with an initial speed of 7.00 x 10^2 m/s. Determine the
1 answer
446 views
A particle with a charge of -4.0x10^-5 C, a mass of 2.0x10^-7 kg and a velocity of 6.0x10^4 m/s [W] is travelling
1 answer
918 views
A charge with a value of 3.0 x 10^-5 C is located 3.0 cm from a charge with a value of 6.0 x 10^-5 C. Determine the distance
1 answer
460 views
A particle with a charge of -4.0x10^-5 C, a mass of 2.0x10^-7 kg and a velocity of 6.0x10^4 m/s [W] is travelling
1 answer
444 views
A charge with a value of 3.0 x 10^-5 C is located 3.0 cm from a charge with a value of 6.0 x 10^-5 C. Determine the distance
1 answer
455 views
A particle with a charge of -4.0x10^-5 C, a mass of 2.0x10^-7 kg and a velocity of 6.0x10^4 m/s [W] is travelling
1 answer
403 views
How would polyethylene have the VSEPR shape of tetrahedral?
2 answers
542 views
A charge with a value of 3.0 x 10^-5 C is located 3.0 cm from a charge with a value of 6.0 x 10^-5 C. Determine the distance
1 answer
475 views
A particle with a charge of -4.0x10^-5 C, a mass of 2.0x10^-7 kg and a velocity of 6.0x10^4 m/s [W] is travelling
1 answer
410 views
Einstein sought to discover a unified field theory that would explain the behaviour of all fields. What evidence have you seen
1 answer
430 views
I got 0.907 KJ for ΔHcomb but I don't know if its correct. I also don't know how to write the equation.
-------- question: A
3 answers
608 views
I got 0.907 KJ for ΔHcomb but I don't know if its correct. I also don't know how to write the equation.
-------- question: A
2 answers
720 views
I have previously posted this question, but now I am lost
question: A calorimeter is filled with 10.0 millimole (mmole) of
5 answers
613 views
A calorimeter is filled with 10.0 millimole (mmole) of methane gas and an excess of oxygen. When burned, the ignition wire
5 answers
770 views
I am to use this formula to find ΔH°f,methane:
ΔH°comb=2ΔH°f,water+ΔH°f, carbon dioxide-ΔH°f,methane-2ΔH°f,oxygen For
2 answers
998 views
The combustion reaction of Mg +1/2 O2-->MgO produces a very bright white flame and high heat. Verify that the following
2 answers
834 views
It is ok to have a negative percent error? I got a negative value for the percent error of the enthalpy of the formation of
3 answers
946 views
why can't the enthalpy of magnesium be measured using a coffee cup calorimeter?
4 answers
387 views
Find the enthalpy of combustion of magnesium using Hess' law given the following data (assume that exactly 100.0 mL of HCl was
3 answers
958 views
For an enthalpy lab, why would calculated value differ from the theoretical value (in percent error) for the heat reaction of
3 answers
1,671 views
Fill in blank without a word bank (unit is wave nature of light)
1. As water waves travels through a slit barrier, they bend and
4 answers
1,194 views
For the equation q=cΔt, q=100KJ, initial temp=20 degrees celsius, final temp=31.4 degrees celsius and I need to find c. Do I
2 answers
911 views
Why would you subtract the heat capacity of the calorimeter when calculating the heat of the reaction?
3 answers
494 views
The following figure represents the ride for a cart with a mass of 200 kg along a frictionless track.
a. Calculate the velocity
2 answers
1,125 views
I am to fill in the blanks without a word bank, my answers are in brackets.
1. A ____ diffraction pattern is unique because it
4 answers
2,705 views
I am to fill in the blanks without a word bank, my answers are in brackets.
1. When light waves reflect from media in which the
4 answers
1,434 views
A human's wavelength is similar to the size of:
a) a cell b) atom c) nucleus d) proton e) something else and why?
2 answers
492 views
Fill in blank
Increasing the distance between a pair of slits through which light is being shone would ___ the distance between
4 answers
1,095 views
Fill in blank:
Two slits can produce an interference pattern with visible light but this maximal point of constructive
2 answers
644 views
Question: Explain whether using solid NaOH pellets rather than aqueous NaOH would alter the enthalpy. If different, would it be
2 answers
622 views
Why would you subtract the heat of a calorimeter when calculating heat of the reaction? hint: the heat of the calorimeter is the
2 answers
524 views
Red light with a wavelength of 660 nm and blue light with a wavelength of 480 nm are beamed at a double slit with a separation
1 answer
421 views
1. If 31 waves pass by a point in 1.7 s, what's the frequency?
my answer: 18.2 Hz 2. if a crest with an amplitude of 7cm
2 answers
503 views
Refraction is:
a) the way light behaves when it goes through a narrow opening b)the way teo light sources interact to produce
1 answer
351 views
1. If the period of a wave is 0.27s, how many waves would pass by in 1.0 minute?
2. When a wave from of light passes through an
4 answers
838 views
Light travelling in water is incident on air refracts at an angle of 27 degrees. What is the angle of incidence?
my answer: 37
2 answers
548 views
Light travelling in water is incident on air refracts at an angle of 27 degrees. What is the angle of incidence?
my answer: 37
1 answer
499 views
light travelling in air is incident on a soap bubble. If the path difference through the soap bubble is 2.5λ:
a) constructive
1 answer
496 views
light travelling in air is incident on a soap bubble. If the path difference through the soap bubble is 2.5λ:
a) constructive
2 answers
764 views
light travelling in air is incident on a soap bubble. If the path difference through the soap bubble is 2.5λ:
a) constructive
1 answer
1,076 views
How would I figure out the answer to this question?
A critical angle of 24.4 degrees applies to: a) light travelling from air
2 answers
603 views
light travelling in air is incident on a soap bubble. If the path difference through the soap bubble is 2.5λ:
a) constructive
2 answers
609 views
Would the answer be b)? diamond into air?
A critical angle of 24.4 degrees applies to: a) light travelling from air into diamond
1 answer
1,173 views
At exactly the critical angle:
a) all light reflects back into the n1 medium b) all light reflects back into the n2 medium c)
1 answer
433 views
In what ways does the World Health Organization assist healthcare?
1 answer
416 views
A critical angle of 24.4 degrees applies to:
a) light travelling from air into diamond b) light travelling from diamond into air
1 answer
497 views
At exactly the critical angle:
a) all light reflects back into the n1 medium b) all light reflects back into the n2 medium c)
1 answer
365 views
The answer for this question is ΔHrxn=-441.40174468085 kJ/mol but I don't know how to arrive to that answer.
0.47g of magnesium
2 answers
486 views
Can you please explain how to solve this question? Would I need to use the formula nλ=dsin(theta)?
Red light with a wavelength
1 answer
430 views
I need help with this question. Would you be able to explain it please?
Double slit interference patterns exhibit mλ path
1 answer
459 views
An astronaut in a spaceship is listening to his music. Calculate the time it takes to play a 4.00 minute song at 0.1c
3 answers
623 views
I am to do an equilibrium constant lab and I am supposed to only find the Kc value. i have to find the equilibrium constant for
2 answers
493 views
Can you please explain if it would be possible to calculate the K value if more than one product or reactant in a chemical
6 answers
376 views
I am given that volume of an unknown acid is 25 mL, volume of NaOH is 13 mL and concentration of NaOH is 1.0 M. I have a graph
1 answer
437 views
Codeine phosphate is a drug used as a painkiller. A common brand contains 30 mg of codeine. Samples of blood were taken at
2 answers
917 views
Determine (6i+2j)· (i-4j+k)
This is a dot product question and each letter has the vector symbol
2 answers
675 views
Nikki is driving a motorboat across a river that flows at 5 m/s. The motorboat has a speed of 12 m/s in still
water. She heads
4 answers
2,110 views
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