01/23/22

A car is traveling at 130 km/h

A car is traveling at 130 km/h due south at a point 4 /5 kilometer north of an intersection. A police car is traveling at 114 km/h due west at a point 2 /5 kilometer due east of the same... more
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01/23/22

𝑃(𝜃) lies on the line segment joining the origin and (−8,15). Find the value of 𝑐𝑠𝑐𝜃 + 𝑠𝑒𝑐𝜃.
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01/23/22

Solve for ΔH for the following problem
MgO (s) + 2 HCl (aq) -> MgCl2 (aq) + H2O (l) ΔH= ?Mg (s) + 2 HCl (aq) -> MgCl2 (aq) + H2 (g) ΔH=?H2 (g) + 1/2 O2 (g) -> H2O (l) ... more
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01/22/22

How can I find the area of the region of y=radicalx, y=x^2, and x=2?
Sketch the region enclosed by the given curves. Find the area of the region. y=radicalx, y=x^2, and x=2.
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01/21/22

What is the magnitude of the force that each sphere experiences? Determine the magnitude of the force that each sphere now experiences.
Two tiny conducting spheres are identical and carry charges of -17.0 ΌC and +60.4 ΌC. They are separated by a distance of 3.37 cm. (a) What is the magnitude of the force that each sphere... more
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01/21/22

Electric field- electrons are orbiting a stationary proton
Four electrons are orbiting a stationary proton along a perfect circle with a constant speed v as shown below. Find the orbital speed and frequency of this circular motion if the radius of the... more
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01/21/22

When 2.35 g of Mg(OH)2 is added to 250.0 mL of water, the temperature of the water raises from 20.5C to 36.0C. Caculate the molar enthalpy of solution.
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01/20/22

What is the mass of the water produced if 5.00 grams of propane are consumed in the following reaction?
What is the mass of the water produced if 5.00 grams of propane are consumed in the followingreaction?C3H8+5O2=3CO2+4H2O
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01/20/22

Selecting a Card If one card is drawn from an ordinary deck of cards, find the probability of getting A 7 or an 8 or a 9
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01/20/22

Is Trigonometry done differently in the us?
Im italian and I've watched some videos from americans and noticed a weird thing. Let's talk about a linear trigonometric equation like this: sinx+cosx+sqrt(3)=0, I've seen americans solving it by... more
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01/20/22

chemistry spectrophotometry
The transmittance of a 0.010 M solution of a compound in a 0.100-cmpathlength cell is T 8.23%. Find the absorbance (A) and the molar absorptivity (Δ).
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01/19/22

Related Rates Problem
A man starts walking north at 2 ft/s from a point P. Five minutes later a woman starts walking south at 7 ft/s from a point 500 ft due east of P. At what rate are the people moving apart 15 min... more
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01/19/22

Please show me how to do this

Find the measure of the obtuse angle.(5y-48)(3y+60)The obtuse angle measures   degrees.
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01/19/22

'The acceleration of a free falling body and gravity are the same thing' and 'acceleration and gravity have the same effect' CAN YOU PLEASE EXPLAIN THIS??

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01/19/22

lets say you have a student loan of $20,000. it generates interest every month, in which the rate is 1% applied monthly for 4 years . How will much you own when you graduate?
Show the calculation you will do to find how much you’ll owe when you graduate.
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01/18/22

general solution of high DE using reduction of order
find the general solution of the DE ..... y1 = x1/24x2y''+y=24x1/2ln(x)I reduced the DE to first linear by letting w = u'w' +1/x w = 6ln(x) / x2found u to be ln3(x)+ln(x)c1+c2my general solution... more
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01/17/22

The acceleration of an object (in m/s2) is given by the function a ( t ) = 4 sin ( t ) . The initial velocity of the object is v ( 0 ) = − 3 m/s. Round your answers to four decimal places.
a) Find an equation v(t) for the object velocity. v(t) =___b) Find the object's displacement (in meters) from time 0 to time 3.____ Metersc) Find the total distance traveled by the object from time... more
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01/16/22

Find the slope of secant line PQ and find the tangent line at point P(1,0) for function y = sin (2pi/x)

x ---> 1- I am not sure what numbers to use to approach the slope of PQ from the left and right. I have tried pi/8, pi/6, pi/5, pi/4 for numbers approaching 1 from the left. x ---> 1+ For... more
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01/16/22

Find the arc length of the graph of the function over the indicated interval.
x=1/3(x)1/2(y − 3),    1 ≀ y ≀ 16
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01/16/22

Discount question
It costs a manufacturer $3,189 to make a product. The rate of markup is 26.00% of the selling price and it offers a markdown of 13.00% during a discount period.a. What is the regular selling... more
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01/16/22

Calculating Concentration Using the Equilibrium Constant
At a given temperature, Kc = 3.24 for the reaction H2 (g) + CO2(g) ⇌ H2O (g) + CO (g) Of 0.800 mole of both H2 and CO2 (g) are placed in a 1.0 L container at this temperature, what is the... more
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01/15/22

The Ksp of Aluminum Hydroxide is 4.6 x 10-33. What is the molar solubility of Al(OH)3 and what mass could dissolve in 200 ml of water?
need to fine the molar solubility and what mass could dissolve in 200 ml of water
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01/15/22

general solution of high DE "variation of parameters"
find the general solution of the non-homogeneous DE:x2y'' -3xy'+4y=x2, x>0I first solved the associated homogen. equation using cauchy euler method and found y1 and y2 to bey1=x2,... more
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01/15/22

GENEREAL SOLUTION OF HIGH DE "REDUCTION ORDER"
find the general solution of the DE given that y1 = exxy'' +(3-2x)y'+(x-3)y=0I want to make sure of my answer. my answer is:y=ex(-C1x-2/2 +C2)please let me know if my solution is correct
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01/15/22

Question on Dynamics. Finding the force
A man of 75kg is standing in the basket of a hot-air balloon. The balloon is rising at 5ms-1 and 4s later it is descending at 3ms-1. Assuming constant acceleration, find the normal contact force of... more
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