01/02/22

Related Rates: Ladder Problem
A ladder 3 meters long leans against the wall of a building. The top slides down at a rate of 0.25 m/sec. How fast is the angle between the ladder and the ground decreasing when the angle is 30°?
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01/02/22

Will someone please help me with these Physics questions.

Which of the following best describes the momentum of two bodies after a two-body collision if the kinetic energy of the system is conserved?a. must be lessb. it will be doublec. must also be... more
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01/01/22

What is the derivative of this logarithmic and exponential function?: x^2 ln(x^5)
I know to set it up like (x^2)[ln(x^5)]' + (x^2)'[ln(x^5)] but am confused how to proceed from this. In-depth steps would be appreciated.
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01/01/22

A very thin symmetric ring

A very thin symmetric ring with a radius of R was spun at an angular velocity around its central axis and set flat on a smooth horizontal surface. When the friction coefficient between the desk and... more
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01/01/22

what is the current produced assumed contast
in a hurricane a bolt of lightning is accompanied by a transfer of a charge of 20000C between the earth and the cloud and the cloud. the lightning holds for 1.2s
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01/01/22

The maximum weight that an elevator in an apartment complex can accommodate is 800 kg. What is the probability that the lift safety reaches the ground when there are 10 adult in the life.
How to solve probability question .
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12/29/21

If the heat needed to melt ice is used to heat up the same amount of liquid water how much will be the increase in temperature for the liquid water?
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12/28/21

Determine if x0 = 0 is an ordinary or a singular point. If it is a singular point, determine if it is a regular or an irregular singular point.
(2 + x) y'' + (1 + x) y' + 3y = 0
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12/27/21

A light bulb is designed by revolving the graph of
y = (1/3)x1/2-x3/2 , 0≤x≤1/3, about the x-axis, where x and y are measured in feet. Find the surface area of the bulb and use the result to approximate the amount of glass needed to make the bulb... more
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12/27/21

Number Sequence
please show solution3/7 8/4 5/9 7/11 12/18 ______Answer key shows 9/13 is the next. Choices are 9/13, 15/11, 14/10, 12/9, and 11/15.30 42 74 126 198 ... more
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12/26/21

Atomic radius difference

Why is the atomic radii of calcium bigger than selenium? Atomic radius / pmCalcium, Ca 197Selenium, Se 116
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12/25/21

Advanced Calculus
The cross section of a 3meter long water trough is a semicircle with a radius of 1 meter. If the water trough is full, how much force does the fluid exert on the end of the trough? How much work is... more
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12/25/21

A 3-Ω and a 1.5-Ω resistor are wired in parallel and the combination is wired in series to a 4-Ω resistor and a 10-V emf device. The current in the 3-Ω resistor is ..
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12/24/21

When is the potato at the height of 34ft?
A potato is launched vertically upward with an initial velocity of 71ft/s from a potato gun at the top of a building that is 79 feet tall. The height of the potato in feet after t seconds is given... more
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12/24/21

A property management company manages an apartment block containing 150 units. All 150 units are rented at a monthly rate of $460 per unit and each occupied unit costs the

A property management company manages an apartment block containing 150 units.All 150 units are rented at a monthly rate of $460 per unit and each occupied unit costs the property management... more
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12/23/21

indicate which of the following metals you think the object is and why.
Perform the following calculation. A metal object is placed in 24.5 mL of water. The cylinder weighs 18.222 g. After the cylinder is placed in the water, the water rises to the 27.2 mL mark. Show... more
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12/22/21

Investment in two accounts
Wyatt invests $9700 in two different accounts. The first account paid 12 %, the second account paid 2 % in interest. At the end of the first year, he had earned $784 in interest. How much was in... more
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12/19/21

Is the approximation and underestimate or an overestimate?
A left Riemann sum with n=6 subintervals is used to approximate the area under the curve of f(x)=−4x2+64x+3 over the interval [6,7]. Is the approximation an underestimate or an overestimate?
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12/18/21

What is the maximum possible volume, in cubic inches, of the box?
An open-top box is to be made from a 30-inch by 42-inch piece of plastic by removing a square from each corner of the plastic and folding up the flaps on each side. What is the maximum possible... more
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12/18/21

Probability of independent events: Decimal answers
Of the people who fished at Clearwater Park today, 48 had a fishing license, and 12 did not. Of the people who fished at Mountain View Park today, 49 had a license, and 21 did not. (No one fished... more
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12/18/21

Software Applications for Business
Enter a formula using arithmetic operators and parentheses in cell be 10 that adds a grant amounts in cells before B5 B6 and B7 and then multiply that result by 12
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12/17/21

Mid-Module Assessment Task
 In August, Cory begins school shopping for his triplet daughters.One day, he bought 10 pairs of socks for $2.50 each and 3 pairs of shoes for 𝑑 dollars each. He spent a total of $135.97. Write and... more
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12/17/21

When a shot-putter exerts a net force of 140 N on a shot, the shot has an acceleration of 19 m/s 2 . What is the mass of the shot?
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12/17/21

Thermal physics
If one end of a solid copper pipe with a diameter of 10 cm is kept at 100 degrees centigrade, and the other side is kept at 0 degrees centigrade, how long will it take for 1000 Joules of energy to... more
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12/17/21

Chem help plz!!!
Iron (II) can be precipitated from neutral solutions by oxidizing it with MnO4–:MnO−4​(aq)+3Fe(OH)+(aq)+2OH−(aq)+2H2​O(l)MnO2​(s)+3Fe(OH)3​(s) What volume of 0.825 M MnO4– is needed to completely... more
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