Answer:
The acceleration is given by de second derivative of x(t) which is equal to m/s^2
Explanation:
a) We have the equation x(t)=at^4+bt^3+ct which is the position of the body of mass m at a time t
Where a, b and c are constants
From the rules of differenciation we have that the first derivative of the position is the velocity and the second derivative is the acceleration.
Hence the first derivative of the function is equal to [/tex] m/s
Don´t forget to write down the unities
Then we have to derivate again this equation, so we have
m/s^2[/tex]
b) Remembering the Newton´s laws we know that
where:
F is the force
m is the mass
and a is the acceleration
From the first part we know the value of the acceleration which is
m/s^2
So using the second law formula and replacing the values we have that
F=m( ) N
Remember the that N= Newton which is kg*m/s^2
The answer to this question is The first option, Or what I should say "A.Thermal"
Your welcome!
Answer:
2 and 0.6 ohms = 1.8A
4ohms = 1.08A
6 ohms = 0.72 ohms
Explanation:
With the help of the given diagram calculate the current through each resistor.
According to ohms law
E = IRt
E is the electromotive force = 9V
I is the total current in the circuit
Rt is the total equivalent resistance
Get Rt
1/R = (1/4+1/6) (parallel resistors)
1/R = 3+2/12
1/R = 5/12
R = 12/5
R = 2.4 ohms
Rt = 2 + 0.6 + 2.4
Rt = 5 ohms
Get the total current
I = E/Rt
I = 9/5
I = 1.8A
Since same current flows in a series connected resistors
Current in the 2 and 0.6 ohms resistors will be 1.8A
For the 4 and 6 ohms resistor:
Voltage across them is expressed as:
V = IR
V = 1.8(2.4)
V = 4.32Volts
The current in 4 ohms resistor
I = 4.32/4
I = 1.08A
The current in 6 ohms resistor
I = 4.32/6
I = 0.72A
1. A broom swishing against the floor
2. a bee buzzing
3. a car engine
hope this helps!
Since,
Speed = Frequency * WaveLength
=> WaveLength = Speed / Frequency --- (A)
Frequency = 13.0 kHz.
As the radio waves are electromagnetic waves, their speed is equals to the speed of light. Therefore,
Speed = C =
Plug in the values in equation(A):
A => WaveLength =
Ans: Wavelength = 23.077 kilometers.-i