Find Answers
Get Study Tools
Get your homework help
23 Areas of Math We Help With
30k+ Questions answered
2 min avg time to find the answer
20b(4b3)3
Find equation for mass in gravityA satellite is moving in circular motion round a planet.From the physics we know that Σ F r = m a r = G M m r 2 So I wanted to find the equation for M knowing also that v = ω r = 2 π r T and a r = v 2 r Thus, m a r = G M m r 2 a r = G M r 2 v 2 r = G M r 2 ( 2 π r T ) 2 r = G M r 2 4 π 2 r 2 T 2 r = G M r 2 4 π 2 r 3 T 2 = G M r 2 4 π 2 r 5 T 2 = G M 4 π 2 r 5 G T 2 = MHowever, this is wrong! It should be: M = 4 π 2 r 3 G T 2 What was my mistake in Mathematics? Please don't migrate it to physics because my misunderstanding is on math.Note: I would be very happy if you show my mistake, instead of showing me another way to get to the equation.
See answers (2)
Suppose you mix two identical blocks of metal, one having a temperature of 10 ∘ and the other 20 ∘ . Is it possible for the cold block to cool to 5 ∘ C and the warm block to warm to 25 ∘ C?A. Yes, because it adheres to the second law of thermodynamics. B. No, because it will violate the zeroth law of thermodynamics. C. Yes, because it adheres to the zeroth law of thermodynamics. D. No, because it will violate the first law of thermodynamics.
See answers (1)
Discrete Math logically equivalent?Show that ( p ∧ q ) ∨ ( ¬ p ∧ ¬ q ) ≡ p ↔ qHow would I go about doing this?Do I use a truth table or a more "algebraic" process?
Solve the following linear system: − a π 0 + ( 1 − b ) π 1 = 0 a π 0 − π 1 + π 2 = 0 b π 1 − π 2 = 0 π 0 + π 1 + π 2 = 1 Here, π 0 , π 1 , π 2 are the variables.
What is the z-score of sample X, if n = 36 , μ = 13.7 , St.Dev = 21 , μ X = 9.9?
Does the following series absolutely converge, conditionally converge or diverge?∑n=1+∞sin(n2)sin(1n2)
To find the equation: (792)(5.19×10−5)
Finding time constants of a circuit?So this is a homework question and I am having trouble figuring out what they are asking.'The potential difference (voltage) across the capacitor at time t > 0 is given by V C ( t ) = q ( t ) / C. The quantity RC has the dimensions of time and is often called the time constant for the circuit. How many time constants does it take for a capacitor to charge to 90% of the applied voltage, V0? Justify your answer'So change in V, or V C , or δ V is 90%. In other words we have 0.9 V = q ( t ) / C?I have found in a previous question that q ( t ) = V 0 C ( 1 − e − t C R ) so 0.9 V = V 0 C ( 1 − e − t C R ) C However I am not sure where to go from here, if I am even on the right track at all.
Prices starting at $5/week., cancel anytime
Step-by-step solutions on your subject developed by experts