1 the problem and all known variables.
A person is murdered in a room with a temperature of 20 deg C. At the time the body is discovered, the body temp is 32 deg C and is decreasing at an instantaneous rate of .1 deg C/minute. How long ago was the murder commited?
2. Related equations...
I was just wondering if there's a way to measure pain. I figured it'd be and equation like current. Like voltage would be the amount of pain, ohm would be a persons resistance to pain, and current would be the pain they actually felt.
We know that there are force carrying particles for the strong and weak nuclear force, and the electromagnetism force. But in Einsteins theory of relativity, he states that gravity is the bending of space time, not a force. So if there is no force, why do we say there must be a graviton?
Ps I'm...
Homework Statement
When a mass is attached to a vertical spring, the spring is stretched a distance d. The mass is then pulled down from this position and released. It undergoes 57 oscillations in 39.0 s. What was the distance d?
Homework Equations
F=-Kx
F=mg
T=2pi*sqrt(K/m)
The...
@ D H
I see... I don't know why I have the sqrt in the g equation...
But even so, I'm getting .01127 m/s^2 and its still wrong.
@rude man
I haven't used the same R.. I used 1323000 m for the top R and 19300 for the bottom R
That's 19.3 km in m.
So I get
g= sqrt((4π^2*(132300)^3)/(19300^2 * 147600^2))
(132300m is 19.3km+113km.)
Which comes to .106 m/s^2, but it still says its the wrong answer.
Homework Statement
Two identical 28.5-kg spheres of radius 12.1 cm are 35.3 cm apart (center-to-center distance) and at rest in outer space. (You can assume that the only force acting on each mass is the gravitational force due to the other mass.)
a) If they are released from rest and...
I have
(4 π^2 (19300m+113000m)^3)/((6.674*10^(-11)) (147600s))
which came out to be
6.28753*10^(16) kg
So then I have
g=sqrt(G M/R^2)
or
g=sqrt((6.674*10^(-11)) (6.28753*10^(16)))/ (19300^2)
Which came out to be 14.74 m/s^2
(sorry about the exponents being...
Ok. So I put the numbers in and got a mass of 6.2875.... E16.
So then using the second equation I came up with 14.74 m/s^2 which is totally unreasonable for and asteroid that small.
I changed all the kilometers to meters so the units all go together, so I'm not sure where I went wrong.
Homework Statement
An asteroid is discovered to have a tiny moon that orbits it in a circular path at a distance of 113 km and with a period of 41.0 h. The asteroid is roughly spherical (unusual for such a small body) with a radius of 19.3 km.
a) Find the acceleration of gravity at the...
Homework Statement
A planet with a mass of 8.99·1021 kg is in a circular orbit around a star with a mass of 1.33·1030 kg. The planet has an orbital radius of 1.21·1010 m.
a) What is the linear orbital velocity of the planet?
b) What is the period of the planets orbit?
c) What is the...
I found the final velocity, but when i tried to use the formula for distance, I found that I didn't have r sub p or T max and have no clue how to find them.
Homework Statement
A rocket in outer space has a payload of 4050.0 kg and 1.753·105 kg of fuel. The rocket can expel propellant at a speed of 4.300 km/s. Assume that the rocket starts from rest, accelerates to its final velocity, and then begins its trip. How long will it take the rocket to...
A hockey puck on a frozen pond with an initial speed of 12.3 m/s stops after sliding a distance of 198.9 m. Calculate the average value of the coefficient of kinetic friction between the puck and the ice.
So I started with finding the acceleration. I divided 12.3m/s by 198.9m then took the...
dory, I was braindead last night. I figured out that the max height is 10.82 m and the range is 13.75 m. although the last one is still bothering me.
I found the time it took the ball to hit the ground from height=10.82 which was about 1.47 s. I used 1.47 in Vy=gt (because Vy at max height is...
Neglect air resistance for the following. A soccer ball is kicked from the ground into the air. When the ball is at a height of 10.07 m, its velocity is (vx,vy) = (4.63,3.83) m/s.
To what maximum height will the ball rise?
What horizontal distance will be traveled by the ball?
With what...
We are given a velocity vs. time graph. It starts at 15 m/s at t=0 and goes to -10m/s at t=4
then it goes from -10m/s at t=4 to 15m/s at t=10 and we are told to find the postion after t=10
I first found the slope of the first segment which was -6.25. so I did ∫-6.25t+15 dt from 0 to 4 and...
I know this is quite simple question.
An object has an into all velocity of 50m/s it's traveling straight up. Assume g=-10m/s^2 how long does it take to go up and down?
I put these numbers into x=1/2at^2+vi*t but I still have 2 variables. X and T. Idk what to do.