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    vrxz

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    [–] Democrat Ohio Sen. Sherrod Brown Seriously Considering 2020 Presidential Run vrxz 1 points ago in politics

    Best case scenario I think is if the special election for that seat is somehow scheduled for the general election.

    [–] Even if we did hack the DNC, they can't sue us: Russia vrxz 1 points ago in politics

    Shouldn't "Russia" come before the colon, and then the statement follows? These headlines always bother me.

    Maybe it should be a hyphen - instead of a colon :

    [–] Democrat Ohio Sen. Sherrod Brown Seriously Considering 2020 Presidential Run vrxz 12 points ago in politics

    Sherrod Brown was heavily considered to be Hillary Clinton's running mate, but was likely passed over because John Kasich was governor and could have appointed a Republican to fill his senate seat in the event Brown won. But I think it would have been a stronger ticket.

    I hope Sherrod Brown runs in 2020, he's a Democrat I would wholeheartedly support. I would enthusiastically vote for just about any Democrat over Trump of course, but Sherrod Brown feels like the real deal to me compared to everyone else. And him being from Ohio is a huge plus for the electoral map.

    I also find it interesting that Brown handedly won reelection while the Governor's race went for DeWine, the Republican (and also a former senator). Ohio is weird.

    [–] [Physics with Calculus I, college Level]: Kinetic Friction Question vrxz 1 points ago in HomeworkHelp

    What also might justify this to you is Newton's First Law of Motion. An object at rest tends to stay at rest, and an object in motion tends to stay in motion unless acted on by some force. This is inertia at work.

    If you fire a gun in space, far away from any gravitational fields, the bullet will travel at a constant velocity and not slow down. Even though there's no net force acting on the bullet, it will have a high velocity!

    [–] [Physics with Calculus I, college Level]: Kinetic Friction Question vrxz 1 points ago in HomeworkHelp

    So frictional force is 20 N, to cancel out the pulling force?

    Yep.

    But then again, I'm confused. What other forces are in play here? How is the object moving?

    Even though there's zero net force, an object can still have a velocity. If there is a nonzero net force, the object will undergo acceleration. Remember F = ma? If F = 0, a has to equal 0. Otherwise if F is nonzero, then a will be nonzero.

    Think about a car that's driving steadily on a highway at 60 mph. Is the driver still pushing the pedal down slightly? Yes. The car is being pushed by a force (from the engine) that exactly matches the force of kinetic friction from the road. The net force acting on the car is zero, but it is moving at a constant velocity of 60 mph.

    [–] [Physics with Calculus I, college Level]: Kinetic Friction Question vrxz 1 points ago in HomeworkHelp

    I figured since the object is moving with constant velocity, the net force acting on the object should equal zero

    Good.

    The problem does tell us the magnitude of the force pulling the object.

    We know the net force will be zero.

    Therefore, can we deduce the opposing force (kinetic friction force) without calculating it?

    [–] [High school] How do you find the last two digits of 2^2018? vrxz 21 points ago in HomeworkHelp

    Get out your calculator, multiply 2*2, and keep hitting enter and watching the powers of 2 grow. Look at the last two digits, do you see a pattern emerging?

    [–] Could somebody double check my work. Pre cal transformations. Much Appreciated! vrxz 1 points ago in HomeworkHelp

    If you just typed it out wrong (as I see your paper has 3 units to the right) then you are in fact correct!

    [–] Could somebody double check my work. Pre cal transformations. Much Appreciated! vrxz 1 points ago in HomeworkHelp

    Looks like you did a horizontal translation instead of a vertical translation. If we're moving 3 units up, we should add to the whole function instead of subtracting from the x term.

    https://www.onlinemathlearning.com/horizontal-vertical-stretch.html

    [–] Why do we cross out ‘pounds’ in this algebraic equation? vrxz 1 points ago in HomeworkHelp

    Basically we have two fractions and we are multiplying them together, then simplifying it.

    The first fraction is (dollars/pound). We multiply this by (pounds). Since any number can be converted to a fraction by dividing it by 1, we can convert pounds to a fraction by writing (pounds/1). So we have:

    (dollars/pound) × (pounds/1)

    To multiply these two fractions, we simply multiply across. Multiply the numerators and multiply the denominators and write a new fraction:

    = (dollars × pounds)/(pound × 1)

    Anything divided by itself is equal to 1. Since pounds is in the numerator and denominator, pounds cancel out.

    = dollars/1

    = dollars

    [–] Physics vrxz 1 points ago in HomeworkHelp

    First off, it should be (-4.9)t2 - 20t + 170 because the cannon fired downward from the horizontal. Try solving again using the quadratic formula and be careful with your algebra.

    https://www.wolframalpha.com/input/?i=(-4.9)t%5E2+-+20t++%2B+170

    [–] Relative Motion Physics HW Help! vrxz 1 points ago in HomeworkHelp

    We need to use some trigonometry.

    The wind is blowing at 50 km/hr 20 degrees north of west. So if you draw this on the xy coordinate plane, we should have an arrow pointing in quadrant II, 20 degrees north of the negative x-axis.

    Find the x component of this wind velocity. We will need to use trig here.

    cos(20°) = adjacent/hypotenuse = x / 50

    The x component will tell us how the plane is being pushed off of its heading. Then we need to figure out what direction (angle) the plane needs to adjust to so we can perfectly offset this.

    Since the plane is being pushed to the left, we need to obviously have the plane oriented toward the right. So we can draw another arrow in quadrant 1, at some angle "a" away from the vertical y-axis. Again, we need to use trig to solve for the angle.

    sin(a) = opposite/hypotenuse = x / 560

    If we plug in x, we can take the arcsin of the right side and solve for a, the angle east of north the plane should travel at.

    Similarly, we can take the sin(20°) to find the y component of the wind velocity which tells us how much speed the wind is adding to the plane in the y direction, and take the cos(a) to get the new y component of the plane's airspeed. If we add them together we get the speed of the plane relative to the ground.

    [–] [Highschool math] How do I do this? vrxz 2 points ago in HomeworkHelp

    Sometimes the solution is so simple we miss it. Happens to me a lot, don't worry!

    [–] [Highschool math] How do I do this? vrxz 1 points ago in HomeworkHelp

    az - ac = -xz + xy

    you take it from here!

    [–] [College Chemistry] Thermochemistry; Can't seem to get the right answer even using formulas vrxz 1 points ago in HomeworkHelp

    Your calculation is good and very close to the "answer," the only difference seems to the the specific heat values that were used to calculate it. Do you have a table of values you were supposed to use?

    https://www.wolframalpha.com/input/?i=(4.186*390*17.3)%2F(.386*248)+%2B+39.9

    If you play around with the specific heat values you will see how the answer can change here.

    [–] [AP Biology] What happens to ATP after cellular respiration or fermentation? vrxz 3 points ago in HomeworkHelp

    It needs to go just about everywhere in the cell, since it is the unit of energy currency which allows the machinery of the cell to do work.

    In eukaryotes, ATP is moved from the mitochondria into the cytoplasm with the help of ADP/ATP Translocase.

    Major functions of ATP:

    • After hydrolysis, provides free energy to drive reactions that would otherwise be unfavorable.

    • Used as a substrate for signal transduction. Kinases transfer a phosphate group to proteins to activate or inactive them.

    • ATP (adenosine triphosphate) is used in synthesis of RNA, and dATP (deoxyadenosine triphosphate) is used for DNA. The A is the same nitrogenous base adenine that we see in DNA and RNA.

    [–] Physics 10 questions vrxz 1 points ago in HomeworkHelp

    Maybe draw a free body diagram.

    We know the initial velocity and the final velocity. We know the time needed to go from initial to final velocity. We know that the force acting to slow the object is constant and is equal to the force of gravity (mg) multiplied by the sine of the angle of incline.

    Therefore, we can use the constant acceleration kinematic equations.

    Vf = Vi + at

    Solve for a, which tells us the acceleration of the object along the direction of movement. Then use the same formula to solve for Vf using the given t values.

    [–] Dissipation of Energy problem [Physics] vrxz 2 points ago in HomeworkHelp

    Let me explain what's happening with energy here.

    1. Just before hitting the driveway, the ball has a certain amount of kinetic energy and zero potential energy (because it is almost touching the ground).

    2. At the instant the ball hits the driveway, a certain amount of kinetic energy is quickly dissipated as sound or heat. The ball now has less kinetic energy than before.

    3. Just after it bounces, the ball is sent upwards with this smaller amount of kinetic energy.

    4. As the ball travels upwards, this kinetic energy is converted into potential energy, because its velocity slows while its height increases.

    5. At the ball's max height, it has zero kinetic energy and maximum potential energy.

    KE = 0.5 m v2

    PE = m g h

    If you find the kinetic energy of the ball before it hits the pavement, and the potential energy of the ball after it bounces at its max height, how can we use these two values to find energy dissipation?

    [–] Geometry advanced teacher gave me a challenge problem, please help vrxz 3 points ago in HomeworkHelp

    https://martin-thoma.com/reflecting-a-point-over-a-line/

    Drawing a picture would help you understand the algebra that needs to be used to solve this.

    Once you figure out the equation of the perpendicular line, set the equation equal to the original function and solve for their intersection point.

    Find the x and y distance between the intersection point and the point of interest, and subtract it from the coordinates of the intersection point to get the coordinates of the reflection point.

    [–] Geometry advanced teacher gave me a challenge problem, please help vrxz 4 points ago in HomeworkHelp

    Draw a picture. Plot the point (6,1). Convert the given equation to y = mx + b form and draw the graph.

    How do we figure out the distance of the point to the graph, so we can reflect it? Draw a straight line from the point to the graph, this line should be perpenricular to the graph.

    Perpendicular means it should have the negative reciprocal slope. Use point slope notation to figure out the function

    y - y1 = m (x - x1)

    Where (x1,y1) = (6,1)

    This should help you get started and give you enough info to reflect the point.

    Drawing a picture will help you enormously, trust me.