A satellite orbits a planet. The gravitational field strength at the radius of the orbit is 12 N/kg. What will the gravitational field strength at the position of the satellite be if
- The planet's density is doubled?
- The satellite's mass is doubled?
I just don't understand their...
Ok. At a depth of 1000m, the ocean temp is 4 degrees celsius and the speed of sound is 1480m/s. From lab experiments, for every 4m/s increase in velocity, the temp increases by 1 degrees.
When the distance is 8000km, the smallest time change that can be detected is 1s, what is the smallest...
A wave travels with speed 200m/s. Its wave number is 1.5rad/m. What are its wavelength and frequency?
distance = wavelength x # of wavelengths
v=lamda(f)
1m = 1.5 (lamda) since in 1 meter there was 1.5 waves. 1/1.5 = 0.66m
200 = 0.66 (f); f = 300Hz.
But this is wrong. I don't know...
A wave travels along a string at a speed of 280m/s. What will the speed if the string is replaced by one made of the same material and under the same tension but having twice the radius?
V = root (Tension/mu)
mu = mass/length
length is 2radii
I manipulated the formulas, however...
ohhh x should be 1.2-1.0=0.2m
http://session.masteringphysics.com/problemAsset/1001073/10/knight_Figure_14_36.jpg
Can you explain to me what the length from 0 to 0.6m is for? Is that the part that is not stretched at all?
I used
(1/2)mv^2 + 1/2kx^2 = 1/2k(A)^2 since at the length 1.2m, the total energy in the system should equal the potential energy at the amplitudes.
So, I just plugged in 54.7kg as m, 240 as k and 0.4m as amplitude and 1.2m as x.
The amplitude concerns me because if I use
x(0) = Acos(theta)...
Hmm right. I thought it was constant for some reason. I know it's not. Okay, I'm not getting the right answer though...The diagram is shaped like a W with the highest point at 1.4m and lowest point at 0.6m. Lasts for 6 seconds...2 oscillations...
Astronauts in space cannot weigh themselves by standing on a bathroom scale. Instead, they determine their mass by oscillating on a large spring. Suppose an astronaut attaches one end of a large spring to her belt and the other end to a hook on the wall of the space capsule. A fellow astronaut...
I just have a simple question as to which radians to use in calculating phase constants in oscillations.
For example in sin(theta) = 1/2, do I use the (pi)/6 or 5(pi)/6?
The exact question has a diagram and is difficult to explain, but I just want a general explanation.
Thank you!
I don't quite understand this problem. I know the formulas to use, but I'm confused as to which mass I should use in the w=root (k/m) equation. Also, the force of friction is around 4.9N, would that also be the block's acceleration? what would that do?