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Dan
Questions (605)
Every once in a while a bird will get hit by a baseball during a baseball game. The longest home runs in baseball land about 500
2 answers
1,018 views
ABC is a right triangle with AB = 2, BC = 3\sqrt{5}, AC = 7 and \angle ABC = 90^\circ. If \cos \angle BAC = \frac{a}{b}, where a
0 answers
489 views
Determine the number of subsets of A=\{1, 2, \ldots, 10\} whose sum of elements are greater than or equal to 28 .
1 answer
746 views
ABC is an acute triangle with \angle BCA = 35 ^\circ. Denote the circumcenter of ABC as O and the orthocenter of ABC as H. If
0 answers
736 views
ABC is an isosceles triangle where AB = AC and BC = 60. D is a point on BC such that the perpendicular distance from D to AB and
1 answer
486 views
A cargo plane is moving with a horizontal velocity of
vx = +225 m/s at a height of y = 920 m above level ground as shown in the
2 answers
5,280 views
Consider a pair of parallel plates with a potential difference of 12 V and are separated by 12 cm.
What is the potential energy
1 answer
755 views
If I have 15 flavors of ice cream and 81 different toppings, how many different combinations could I create (assuming only 1
3 answers
663 views
The specfic heat of iron is 0.11cal/g C. The heat of fusion of iron, the heat required to convert iron from a solid to liquid at
2 answers
3,121 views
How many moles of gas are in a 30 liter scuba canister if the tempature of the canister is 300 k and pressure is 200
1 answer
890 views
How many moles of gas are in a 30 liter scuba canister if the tempature of the canister is 300 k and pressure is 200
3 answers
1,219 views
A rock band has 5 members, and 2/5 of the members play string instruments. Also, 0.4
of the members sing. Does the band have the
11 answers
2,141 views
What's 6/20 in simplest form? ( I know what simplest form is)
5 answers
490 views
A pitcher throws a baseball with a horizontal velocity of 132 ft/s (90 mph) toward home plate that is approximately 60 ft. away.
1 answer
959 views
A long jumper leaves the ground with an initial velocity of 12 m/s at an angle of 28-degrees above the horizontal. Determine the
2 answers
4,550 views
Train A starts at 4 miles South of a bridge and heads North at a constant speed of 30 miles per hour. Train B starts 6 miles
2 answers
1,574 views
A train is moving towards a destroyed bridge. The velocity of the train remains constant at 20 m/s. A person inside the train
1 answer
904 views
At a certain instant, a ball is thrown downward with a velocity of 8.0 m/s from a height of 40 m. At the same instant, another
0 answers
1,000 views
A plane is flying at 25 degrees north of west at 190km/ h. Suddenly there is a wind from 15degrees north of east at 45 km/ hr.
1 answer
1,369 views
Plane flying southwest at 155mi/hr. their is a wind from the west at 45.0mi/hr. what's the planes new velocity
0 answers
442 views
Consider the line 9x-6y=-3 .
What is the slope of a line parallel to this line? What is the slope of a line perpendicular to this
3 answers
3,348 views
There is exactly one triangle the length of whose sides are integers in arithmetic progression and whose area is 156 square
0 answers
460 views
Do you add Nacl or HCL if your target buffer pH is 8, and the buffer is HEPES
2 answers
405 views
Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 433 N and F2 = 354 N.
0 answers
545 views
Forces of 11.3N north, 19.1N east, and 14.5N south are simultaneously applied to a 4.12kg mass as it rests on an air table. What
0 answers
622 views
A rowboat crosses a river with a velocity of 3.30 mi/h at an angle 62.5° north of west relative to the water. The river is
1 answer
4,277 views
compare the collision of a baseball and bat with the collision of a baseball and a fielder's glove when the baseball is caught.
1 answer
1,025 views
Question: particle J with zero initial mass and X energy accelerates
from a static start to 'C' (light speed) in a time frame of
0 answers
658 views
If the side chain of a glutamic acid residue has a pKa of 4.1, at pH 6.1 the ratio of uncharged to charged side chain would be
0 answers
432 views
If the side chain of a glutamic acid residue has a pKa of 4.1, at pH 6.1 the ratio of uncharged to charged side chain would be
0 answers
906 views
Which of the following amino acids has the most hydrophilic side chain?
A. F B. Q C. V D. M E. A
1 answer
471 views
Which of the following amino acids has a side chain that carries a negative charge in its conjugate base form?
A. H B. W C. C D.
0 answers
490 views
The largest-caliber antiaircraft gun operated by the German air force during World War II was the 12.8 cm Flak 40. Suppose this
1 answer
3,447 views
Find the speed, v, of a pendulum at the bottom of its swing (B), given that it has mass m and initial height at A is h (the
1 answer
1,092 views
Consider the system
x-2y=k-1 4x+(1-k^2)y=8 For what values of k does the system have a. unique solution? b. infinitely many
2 answers
992 views
A 100 inch piece of string is cut into 3 pieces. One piece forms a circle, one forms a square and 1 forms an equilateral
1 answer
683 views
Write a balanced equation for the reaction between an aqueous solution of calcium nitrate being mixed with an aqueous solution
1 answer
681 views
Arena Distributors is a new company and currently pays no dividends. The company has just reported earnings of $1.5 per share
2 answers
1,119 views
Seven years ago a semi-annual coupon bond with a 10% coupon rate, $1,000 face value and 15 years to maturity was issued by Corn
0 answers
713 views
A rational number is the form of a/b, where a and b are integers with b != 0. Develop and test a class for processing rational
0 answers
492 views
to strengthen his arm and chest muscles, an 82-kg athlete who is 2.0 m tall is doing push ups. his center of mass is 1.15 m from
0 answers
1,116 views
Which one of the following stresses would be most likely to cause a bone to fracture?
A) tensile stress B) compressive stress C)
2 answers
1,761 views
Overview
The purpose of the assignment is to develop a basic understanding and skills programming of input/output ports and
0 answers
678 views
Alexa and Emma are looking up at their house from the backyard. From alexa's point of view, the top of the house is at an ang;e
1 answer
4,961 views
From a point 120 feet from the base of a plant building the angle of elevation to the roof line of the building is 38 degrees.
0 answers
1,084 views
A falling iPad takes 0.15 s to travel past a window 2.7 m tall. From what height above the top of the window did the mobile
0 answers
431 views
A falling iPad takes 0.15 s to travel past a window 2.7 m tall. From what height above the top of the window did the mobile
2 answers
472 views
An airplane flies 200 km due west from city A to city B and then 270 km in the direction of 31.0° north of west from city B to
1 answer
1,288 views
A river flows due east at 2.00 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant
1 answer
602 views
Say your parents give you a car for your birthday. It is not the new model you wanted, but it's in very good condition. They
1 answer
612 views
Say your parents give you a car for your birthday. It is not the new model you wanted, but it's in very good condition. They
0 answers
409 views
A company purchased a machine on January 1 of the current year for $750,000. Calculate the annual depreciation expense for each
1 answer
1,842 views
When a resistor is connected across the terminals of an ac generator (112 V) that has a fixed frequency, there is a current of
1 answer
739 views
When a resistor is connected across the terminals of an ac generator (112 V) that has a fixed frequency, there is a current of
1 answer
1,969 views
First, I'd like to thank you for your response to my question. However, I had some follow up questions on your response from
1 answer
993 views
In the circuit below, at time t = 0, the switch is closed, causing the capacitors to charge. The voltage across the battery is
3 answers
775 views
In the circuit below, at time t = 0, the switch is closed, causing the capacitors to charge. The voltage across the battery is
4 answers
836 views
The work done by an electric force in moving a charge from point A to point B is 3.75 x 10^-3 J. The electric potential
1 answer
2,324 views
An object carries a charge of -8.0 uC, while another carries a charge of -2.0 uC. How many electrons must be transferred from
2 answers
8,019 views
An object carries a charge of -8.0 ìC, while another carries a charge of -2.0 ìC. How many electrons must be transferred from
2 answers
2,213 views
You are explaining why astronauts feel weightless while orbiting in the space shuttle. Your friends respond that they thought
2 answers
5,088 views
John Jones buys a flat screen TV costing $1200. He pays $200 down and finances the balance at 15% add-on interest, to be repaid
1 answer
400 views
A railroad car moves under a grain elevator at a constant speed of 3.70 m/s. Grain drops into the car at the rate of 580 kg/min.
1 answer
859 views
A scuba diver searches for treasure at a depth of 20.0m below the surface of the sea. at what pressure must the scuba device
1 answer
1,430 views
I am very confused about how to start this problem:
A 29.8 mL sample of 0.354 M methylamine, CH3NH2, is titrated with 0.231 M
1 answer
728 views
How do I do this problem, I am very confused on how to even begin:
An aqueous solution contains 0.167 M ascorbic acid (H2C6H6O6)
1 answer
561 views
Presented below are selected financial statement items for Rowe Corporation for December 31, 2012.
Inventory $55,000 Cash paid to
0 answers
745 views
At 1 atm, how much energy is required to heat 39.0 g of H2O(s) at –22.0 °C to H2O(g) at 163.0 °C?
1 answer
879 views
If the sun rises at 6 AM and is directly overhead at 12 noon, estimate the time (hour and minutes) when a 34-foot tree will have
1 answer
616 views
If sec theta = radical 5, what is the exact value of cos theta
1 answer
363 views
If sec theta = radical 5, what is the exact value of cos theta
1 answer
398 views
Gaseous hydrocarbons, which contain only carbon and hydrogen, are good fuels because they burn in air to generate large amounts
1 answer
639 views
A pilot is flying over a straight highway. He determines the angles of depression to two mileposts, 3 mi apart, to be angle x =
2 answers
1,924 views
Derive the following formulas using Taylor series and then establish the error terms for each.
f'(x) approx=
0 answers
516 views
The car has a mass of 1200kg
Calculate the kinetic of the car when it travels at a speed of 12 m/s.
3 answers
757 views
In the 17th century, there were more than 800,000 inhabitants of Paris. At the time, it was believed that no one had more than
1 answer
1,365 views
our objects are situated along the y axis as follows: a 1.94 kg object is at +3.27 m, a 2.76 kg object is at +2.18 m, a 2.78 kg
1 answer
628 views
You pick up a board of length 2.60 m and mass 13.00 kg. To do this, you exert a force upward with your left hand a distance
1 answer
938 views
How much energy (heat) is required to convert 248 g of water from 0oC to 154oC? Assume that the water begins as a liquid, that
2 answers
1,525 views
One dimension. In Fig. 13-32, two point particles are fixed on an x axis separated by distance d. Particle A has mass mA and
0 answers
911 views
One dimension. In Fig. 13-32, two point particles are fixed on an x axis separated by distance d. Particle A has mass mA and
1 answer
949 views
You have a 2.4 m high platform that is level on top. A spring launcher is located on the top so that it launches objects
0 answers
1,067 views
I have to translate this to indirect style is this correct?
Original:Pero cien años después, las personas negras todavía no
2 answers
1,115 views
Is it not possible to talk to tutors or students directly?
1 answer
416 views
A 72.0 kg skateboarder wants to just make it to the upper edge of a "quarter pipe", a track that is one-quarter of a circle with
1 answer
1,486 views
I posted a the same problem with different numbers a minute ago. The answer to the problem below (same as the other with
1 answer
582 views
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 28.9 m/s, the block
1 answer
613 views
A 9.60 g coin is placed 10.7 cm from the center of a turntable. The coin has a coefficient of static friction of 0.80 and a
2 answers
773 views
a runner run halfway around a circular track whose radius is 60 meters in 45 secs
what is the average velocity? what is the
1 answer
611 views
light travels at a constant speed of 3x10*11 cm/sec. how long does it take light to reach the earth a distance of 1.5x10*8 km.
1 answer
1,180 views
A thin 2kg box rests on a 6kg board 50cm long with 20cm hanging off the edge of a table. How far can the center of the box be
2 answers
4,819 views
Compressed air is used to fire a 41.0 g ball vertically upward from a 1.0-m-tall tube. The air exerts an upward force of 3.7 N
1 answer
1,450 views
A car is traveling at 95km/hr when it collides with a stone wall. The car comes to rest after the first 30 cm of the car is
1 answer
511 views
The captain of a ship at sea sights a lighthouse which is 120 feet tall.
The captain measures the the angle of elevation to the
2 answers
4,814 views
In the figure below, m1 = 10.0 kg and m2 = 4.5 kg. The coefficient of static friction between m1 and the horizontal surface is
2 answers
1,046 views
A truck at rest at a stoplight accelerates uniformly with acceleration a = 9 meters/second2 for 6.8 seconds after the light
0 answers
575 views
Sketch the region enclosed by the given curves.
Decide whether to integrate with respect to x or y. Then find the area of the
1 answer
968 views
Does anyone know what book will we be using for poems,short stories and literature in Grade 12?
1 answer
836 views
Out of 42 kids in a class twice as many failed Ela as math,4 failed both. If 7 failed neither, find how many failed each
2 answers
616 views
Under what circumstances does the sampling distribution of the proportion approximately follow the normal distribution?
1 answer
1,899 views
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