Questions asked by Denise Granger
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Can anyone confirm the answer I have to this question?
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A woman fell 14.4m from the top of a building, landing of the top of a metal ventilator box, which she crushed to a depth of 80 cm. She survived without serious injury. What acceleration (assume uniform) did she experience during the collision?
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Find the limit as h approaches 0?
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Evaluate the limit of the indeterminate quotient?
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Evaluate the limit by using a change of variable?
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Find the constants of A and B?
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A model rocket is fired vertically from rest. It has a constant acceleration of 17.5m/s^2 for the first 1.5 s. Then its fuel is exhausted, and it is in free fall. (a) Ignoring air resistance, how high does the rocket travel? Cont.
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You drop a stone into a deep well and hear it hit the bottom 3.20 seconds later. This is the time it takes for the stone to fall to the bottom of the well, plus the time it takes for the sound to reach you. If sound travels at a rate of 343m/s in (cont.)?
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Projectile Motion Problem?
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Bob is planning his motorcycle jump stunt over school buses. He plans to use a 400 angle jump, and leave the jump at 100 km/h. If he takes off and lands at the level of the school buses” roofs, and each school bus is 5m wide, how many school (cont)?
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A cannon shoots a projectile at 24 degrees from the horizontal. It lands on level ground 3000m down range.
a) Find the initial velocity
b) Calculate its maximum height?
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Can someone help clarify this question?
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For what values of a and b will the parabola y=x^2 + ax + b be tangent to the curve y=x^3 at point (1,1)?
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Determine the equation of the tangent to y = (3x^-2 - 2x^3)^5 at (1 , 1 )?
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Can someone help out with the question below?
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A man pulls his child in a sled at a constant velocity. The child and sled have a combined mass of 60 kg. The force applied on the handle is 200N at an angle of 15. Draw a free body diagram. What is the normal force acting on the sled?
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Y = 2x^3sinx - 3xcosx
Find the derivative of the equation?
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Can someone explain this question?
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Caculus question on finding deriavatives?
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Can someone help answer this question with a diagram and the theory behind it?
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A closed rectangular storage bin is to be made so that it has a square base. The volume of the bin must be 8m^3. The material to make the sides costs twice as much as that for the top and the bottom. Find the dimensions of the box that will (- cont.)?
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Question regarding potential energy?
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A student stretches a spring horizontally a distance of 20 mm by applying a force of 0.20 N [E]. Determine the force constant of the spring?
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An elevator filled to capacity has a mass of 1 200 kg. It goes up one floor, a distance of 3.6 m, at constant velocity in 3.0 s. What is the power of its motor?
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A small explosive charge is placed in a rubber block resting on a smooth surface. When the charge is detonated, the block breaks into three pieces. A 200-g piece travels at 1.4 m/s [N], and a 300-g piece travels at 0.90 m/s E [10°] N? (cont.)
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Two objects collide in an elastic collision. If object 1 is traveling with a velocity of 7.5 m/s and object 2 is traveling with a velocity of – 2.5 m/s. what is the final velocity of each object?
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How much work must be done on a 2000kg rocket in order for it to reach an altitude of 500km?
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A spring with a force constant of 89 N/m is compressed 8.7 cm and placed between two stationary dynamics carts of mass 1.0 kg and 1.5 kg. If friction is negligible, determine the final speed of the more massive cart when the spring is released?
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A river is 900 m wide and flows at 4 m/s. Jo paddles a canoe at a speed of 10 m/s in still water. A dock and a marina are directly across from each other on the river. She paddles from the dock directly to the marina. How long does it take her to (cont.)?
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A parallelogram is determined by the vectors a = (-2,5) and b = (3,2). Determined the angles between the diagonals of the parallelogram?
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Determine the value(s) of k such that (2k, 3, k+1) x (k-1, k, 1) = (1, -2, 2)?
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What is the electric potential from a charge of 3.0 x 10^-5 C at 15 cm and 65 cm? How much work must be done to carry a +2.3 x 10^-3 charge from 65 cm to 15 cm?
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Sarah can paddle a rowboat at 6 m/s in still water. She heads out across a 400 m river at an angle of 30 upstream. She reaches the other bank of the river 200 m downstream from the direct opposite point from where she started. Determine the river current?
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Can anyone take a look at the vector problem below?
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What is the magnitude of the magnetic field 1.5 cm from a long, straight conductor carrying a current of 3.2 A?
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A student dressed in a suit of iron armor has a total mass of 210 kg. An electromagnet has just enough force to hold him suspended in the air. What is the force applied by the electromagnet?
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An electromagnet can exert a lifting force of 12.0N when it operates from a current of 5.0A. What mass can it lift if the current is increased to 8.0A?
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For what value(s) of k, if any, will the line L: (3,4, −2) + t(−1, k, 3),t ∈ R be parallel to the plane 3x + y − 2z + 5 = 0?
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Can anyone explain the logic behind this question?
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An average force of #6.00 xx 10^-3# #N# is required to move a #4.50 xx 10^-4# #C# charge from one point to another point that is #0.750# #m# away. The potential difference between the two points is?
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Question regarding light refraction?
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Question related to the angle of refraction?
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Calculate the weight of the specific element:
Barium in 5 mmol of barium sulphate (BaSO^4)?
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What weight of potassium permanganate is required to produce 300mL of solution such that 5mL of this solution diluted to 250mL gives a 0.01% w/v solution?
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How would the molecule below be named based on IUPAC naming?
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Calculate the pH of a solution resulting from the addition of 15.0 mL of a 0.340 M NaOH (aq) to 25.0 mL of 0.250 M HCl (aq)?
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Can anyone explain the reaction mechanism below with a diagram of the movement of electrons?
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Can anyone provide the workings and explain the question below?