Answer:
I = 2.33 µA
Explanation:
given,
Effective resistance (R)= 300 Ω
Voltage of signal (V)= 700 µV
current flow in the antenna = ?
Using ohm's law
V = I R
where I is the current flow
I = 2.33 x 10⁻⁶ A
I = 2.33 µA
Hence, the current flow in the antenna downloaded is equal to I = 2.33 µA
Answer:
4km/m
Explanation:
She was going at 2km/m, so 2 kilometers per minute. She has 2 minutes therefore she needs to double her rate to 4 kilometers per minute.
The gravitational attraction of the Earth provides the centripetal force that keeps the satellite in circular motion around it:
where the term on the left is the centripetal force, while the term on the right is the gravitational force, and
m is the mass of the satellite
v is its orbital speed
r is the distance of the satellite from the center of Earth
G is the gravitational constant
M is the Earth's mass
Simplifying, we get:
However, we must be careful: r is the distance of the satellite from the Earth's center, so we must add the Earth's radius (6370 km) to the distance of the satellite from the surface (830 km):
The Earth's mass is
, so the orbital speed of the satellite is
Answer:
Vf = 21 m/s
Explanation:
Data:
- Initial Velocity (Vo) = 15 m/s
- Acceleration (a) = 2.0 m/s²
- Time (t) = 3 s
- Final Velocity (Vf) = ?
Use formula:
Replace:
- Vf = 15 m/s + 2.0 m/s² * 3s
Multiply the acceleration with time:
Solve the sum:
The velocity of the car at the end of the 3 second interval is <u>21 meters per second.</u>
b- a bicycle sitting on the ground
a- a car moving at a constant velocity
An object is in equilibrium when the forces acting on the object are opposite of one another and equal. In this case, the force of the ground and the force of gravity are both acting on the object, but since the object either isn't moving or has constant velocity, the forces are therefore equal and in opposite directions.