Aprobe orbiting venus exerts a gravitational force of 2.58 × 103 n on venus. venus has a mass of 4.87 × 1024 kg. the mass of the probe is 655 kilograms. the gravitational force is 6.67 × 10-11 n*m2/kg2. to three significant digits, the probe is × 106 m from the center of venus.

By law of gravitation we know that

given that

now by the formula

by solving above we have

so above is the distance

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me