01/10/21

Conservation of Energy Problem
A spring with a constant K = 200 N/m is attached to a wall horizontally. It is stretched a distance of x = 0.25 m. The block is released and allowed to move. Assume surface is frictionless, and... more
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01/09/21

physics question
A physics student ridges Seattle's Big Wheel Ferris Wheel in a vertical circle with a radius of 22 m. The wheel malfunctions and starts going at a very fast, but constant speed. If the physics... more
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12/29/20

Chem 30 school question
when 50.0 ml of 1 mol/liter agno3 and 50ml of 1 mol/litre Hcl are mixed in a calroimeter, the temperature rises by 8.1 celcius determine the molar enthalpy change per mole of acid for the given... more
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12/11/20

I am kind of confused on this problem.
A ball projected horizontally with an initial velocity of 20 m/s east, off a cliff 100 meters high. It takes 4.5 s for the ball to reach the ground. [Neglect air resistance] How far from the base... more
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12/11/20

Find the non real roots of the following equation.

   x=a=b=c=d=
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12/11/20

A 792 kg rollercoaster car is on the Inside of a loop of radius 18.7 m. At the top of the loop, the car moves at 17.3 m/s. What is the normal force on the car at that point?
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12/11/20

How would you answer this?
A 2-kg body of mass is moving on a horizontal frictionless surface with a velocity of 4 m/s. What is the net force required to keep the body moving with the same velocity and direction for 5 s?I... more
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12/11/20

Which item gets to the bottom first?
A Hoop (a car tire), and a solid sphere (a bowling ball) and a solid cylinder (a round fence post) all roll down a hill at once. Which item gets to the bottom first?m g h = ½ m v2 + ½ I w2   w = vT... more
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12/11/20

question 5 calculus

5. (12 pts) Set up an integral for the volume of the solid generated by rotating the region in the plane bounded by the graphs of the equations: 2-y=1 x = 2 y=0 (Do not evaluate the integrals). (a)... more
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11/24/20

A few chemistry problems I need help with
A chemist ran a particular reaction at different temperatures to determine the activation energy of the reaction. The plot of his data displayed the following linear regression. Determine the... more
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11/21/20

what amount of energy was changed over to Thermal Energy in this issue?
The "Niagara Falls" water slide to waterpark and has a stature of 76.0 feet (23.2 meters). Since the slide isn't totally vertical the all out length of the slide is 90.0 feet (27.4 meters). A 70.0... more
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11/16/20

How would you solve this expression algebracially?
2|x+1|-3=3
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11/16/20

Can anyone help me condense the expression cos(2alpha-beta) so that it only has one of the given terms?
What I am looking to achieve here is to use more than one trigonometric identities to write cos(2alpha-beta) as an expression that either only concerns alpha or beta, and not both. I have been... more
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11/16/20

Ideal Gas Laws: Molar Mass And Density
Uranium hexafluoride is a solid at room temperature, but it boils at 56°C. Determine the density of uranium hexafluoride at 70.°C and 747 torr.Density= g/L
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11/16/20

Write the complex number in polar form 2-2 sqrt(3i)
Please show steps to solve, thank you.
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11/15/20

A bag contains 39 U.S. quarters and eleven Canadian quarters. If four quarters are randomly picked from the bag, what is the probability of getting at least one Canadian quarter?

Answer should be rounded to one decimal place.
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11/15/20

calculate the percent yield for the reaction P4 +6 Cl2 = 4 PCl3. if 75.0 g pf phosphorous reacts with 345 g of chlorine to produce 111.0 g of phosphorus trichloride.
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11/14/20

projectile motion
A man is walking along the beach when a rock hits the top of his head. He looks up and realizes that it must have come from a 45 meter cliff above her. If the man is 1.97 meters tall, what was the... more
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11/14/20

If the average thermal speed vrms must be at least 6 times smaller than the escape speed vesc for a certain type of molecule to be stable in a planet’s atmosphere,
determine whether molecular oxygen (O2) would be stable near Mars’s surface. Mars has a mass of 6.4x1023 kg and a radius of 3,400 km. The average temperature on Mars is T= -81°F.
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11/13/20

Find the point on the line − 5 x + 7 y − 3 = 0 which is closest to the point ( 5 , 1 ) .
I am not sure how to approach this one!
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11/07/20

Physics Problem Solving
A meter stick sits balanced on a fulcrum, placed at the 40cm mark with a weight (W) placed at the 10cm mark. What is the weight of the meter stick?
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11/07/20

Find the area enclosed by the cardioid r = 1 − sin θ
Find the area enclosed by the cardioid r = 1 − sin θ (4 points)answer choices 3π 6π 12π
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11/07/20

What is the appropriate equation?

My college’s average electric power consumption is about 2 MW. What area of 15%-efficient photovoltaic modules would be needed to supply this much power during a summer month when... more
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10/27/20

Find the linear approximation of the function f(x) = sqrt(1 − x) at a = 0.
L(x)= Use L(x) to approximate the numbers  0.9  and  0.99 . (Round your answers to four decimal places.)
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10/24/20

this question is confusing me

Determine the values of a and b in relation y = ax^2 + bx – 157 if the vertex is located at (– 6, – 13) I know I have to find the axis of symmetry but I'm not 100% sure how to without a or b. Can... more
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