11/28/17

math help plz
A rocket is fired upward from a planet . the height in meter after t seconds is given by the function h(t)=-2.3t^2+41t. When will the rocket reach a height of 160 meter. When will it attain its... more
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11/28/17

math help plz
A rocket is fired upward from a planet . the height in meter after t seconds is given by the function h(t)=-2.3t^2+41t. When will the rocket reach a height of 160 meter. When will it attain its... more
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11/28/17

write the complete nuclear equation for the bombardment of a ^27Al atom with an a particle to yield ^30P.
show the atomic number and mass number for each species in the equation
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11/28/17

Sodium-24 has a half-life of 15.0 hours. A sample of sodium-24 with an initial mass of 22.5g was stored for 45.0 hours.
how many grams of sodium-24 is left in the sample after 45.0 hours?
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11/28/17

1) what is the daughter nucleus when ^227Th undergoes alpha decay?
2) what is the daughter nucleus produced when ^227Ac undergoes beta decay by emitting an electron? 
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11/28/17

A sprinter completes its 100 metre race in 12s.find its average spee
answer  
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11/28/17

what is brownian motion
answer  
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11/28/17

moment of inertia, acceleration
A cord attached to a 3.63-kg mass is wrapped around a wheel of radius 0.610 m and released. The moment of inertia of the wheel is 2.71 kg · m2. If the wheel rotates on frictionless bearings, the... more
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11/28/17

give an example of a linear equation in slope intercept form
 a numerical example of a linear equation in slope intercept form
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11/28/17

Solve Using Substitution. Show solution please ☺️
r2/3+8r1/3=-15
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11/27/17

Sine wave as a function of time
Find the frequency and the angular velocity of a repeating waveform whose period is 1/4s 
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11/27/17

Good evening and thank you very much. Question about polynomial closure.
  I am trying to explain to someone why polynomials are closed under addition, subtraction and multiplication. I was going to tell them that even though in some cases these operations can produce... more
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11/27/17

-5 x 20 to the power of w = -20
-5 times 20 to the power of p = -20
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11/27/17

A 72 kg rock is blasted into pieces. One piece has a mass of 29kg and is moving North at 33m/s. What is the velocity of the other piece?
This is a momentum/impulse problem
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11/27/17

Ian C. took 7 seconds to stop after exiting the half-pipe while snow-boarding at 9.4 m/s. What is his acceleration?
find acceleration
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11/27/17

A population of bacteria is growing at the rate of 2.3% per minute.
6. A population of bacteria is growing at the rate of 2.3% per minute. Calculate how long it will take for the size of the population to double. Give your answer to the nearest minute.
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11/27/17

Based on the electron configurations and orbital spin diagrams for elements sodium and chlorine
explain why sodium metal reacts with chlorine gas to give the compound sodium chloride 
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11/27/17

if 0+0=0 , 0-0=0 and 0×0=0 then 0÷0=0 why not..?
No I I want reply from you
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11/26/17

Calculate either [H3O+] or [OH-] for the solutions at 25°C.
A) [OH-]=2.07×10^(-7) M [H3O+]=   B)[H3O+]=8.77×10^(-9) M [OH-]=   C)[H3O+]=0.000647 M [OH-]=   Which of these solutioms are basic at 25°C?
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11/26/17

How can i solve for x, Y = -0.471*exp (-0.004*x) +0.205
How can I solve the above equation for x?
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11/26/17

look at description please!
Suppose that a constant force is applied to an object. Newton's Second Law of Motion states that the acceleration of the object varies inversely with its mass. A constant force acting upon an... more
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11/26/17

How long will it take money to triple at and APR of 8.4% compounded annually
It will take _____ years to triple in amount at 8.4% APR
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11/26/17

The number of Aids cases reported has grown exponentially. In 1984 there were 160 aids cases and in 1987 there were 10240 cases. Let f(t) =a•b^t
Find an equation of f(t). (find the exact andwer)
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11/26/17

How would I solve this?
"Two crewmen pull a boat through a lock, as shown in Figure 5-22. One crewman pulls with a force of F1 = 120 N at an angle of θ = 34° relative to the forward direction of the boat. The second... more
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11/26/17

U-tube (closed on both ends); multiple gases
The U-tube in the figure is sealed at both ends. It contains a gas A (located in the right arm), another gas B (located in the left arm) and mercury. The heights of mercury in the two arms are as... more
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