?

You can choose (forward, backward, both or none).

A piece of paper at room temperature reacts with oxygen to give carbon dioxide and water.

Vodka at room temperature separates into two phases - water and alcohol.

A book absorbs energy from the floor and jumps up back to the shelf.

Water freezes at 10°C and 1 atm.

I tried all none, all backwards, all none except the last one backwards but my answers were wrong.

Thanks for the help!

Where necessary, use z=t if a single dummy variable is needed and z=t and y=s if two dummy variables are needed.

x-2y+z=5

2x-3y+z=8

Thank You

The growth rate r(t) of a population p(t) is given by

r(t)= 100-6t, 10<t<=20

2t^2/5, 0<=t<=10

Assume, in addition that p(0)=40

(a) Determine when the population reaches its maximum (tmax)

(b) Find the maximum population p(tmax)

Thank You

Function F = f.g so that the limits of F and f at a exist and the limit of g at a does not exist.

The most general form of a function with the property that its second derivative is the

zero function.

Thanks

Find the most general antiderivative of sin t + 2sinh t

I got

-cost+2cosht+c

f '(t)=t+1/t^3, t>0, f(1)=6

I got

f(t)= t^2/2 - 1/2t^2 +6

f ''(x)= 8x^3+5, f(1)=0, f ' (1)=8

I got

f ' (x)=2x^4+5x+1

f(x)= 2x^5/5 + 5x^2/2 + x - 39/10

a(t)=3cost-2sint, s(0)=0, v(0)=4

I got

v(t)= 3sint+2cost+2

s(t)=-3cost+2sint+2t+3

Is this corrcet?

thanks

A ladder of length L = 2.0 m and mass m = 17.0 kg rests on a floor with coefficient of static friction μs = 0.54. Assume the wall is frictionless.

1) What is the normal force the floor exerts on the ladder? 166.6N correct

2) What is the minimum angle the ladder must make with the floor to not slip? 42.8 correct

3) A person with mass M = 63.0 kg now stands at the very top of the ladder.

What is the normal force the floor exerts on the ladder? 784 I don't know if it is correct

4) What is the minimum angle to keep the ladder from sliding?

Thanks

A gymnast with mass m1 = 43.0 kg is on a balance beam that sits on (but is not attached to) two supports. The beam has a mass m2 = 106.0 kg and length L = 5.0 m. Each support is 1/3 of the way from each end. Initially the gymnast stands at the left end of the beam.

1)What is the force the left support exerts on the beam? 1362.2 N correct

2)What is the force the right support exerts on the beam? 98 N correct

3)How much extra mass could the gymnast hold before the beam begins to tip? 10 Kg correct

Now the gymnast (not holding any additional mass) walks directly above the right support.

4)What is the force the left support exerts on the beam?

5)What is the force the right support exerts on the beam?

6)At what location does the gymnast need to stand to maximize the force on the right support?

at the center of the beam

at the right support

at the right edge of the beam

Can you help me with 4 and 5. I think it is C in 6. Is that right?

Thanks

Suppose that f is a polynomial of degree n, where n>=2. Show that if f has n distinct roots, then f'(x) must have n- 1 distinct roots.

of the room is 24C. At 12:20 the temperature of the pie is 36C and is decreasing at a rate of 2degrees/min. What was the temperature of the pie when it was brought out of the oven?

I don't have a credit card and I want to be a member in runescape