uppose hypothetically we put a spacecraft into orbit around the Sun to chase and recover an asteroid. Of course we place a clock on it to control the timing of the on-board computer that will autonomously run the spacecraft, and we synchronized the clock with precision Earth clocks before launch. After 10 years the spacecraft returns with its precious sample, ready to deliver it to anxious aging scientists at home. If on average during its journey it traveled at 30 km/s (that's the Earth's orbital speed around the Sun), what can we say about the clock on the spacecraft when it gets back home.

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults

Arunner is jogging at a steady 3.6 km/hr. when the runner is 2.9 km from the finish line, a bird begins flying from the runner to the finish line at 14.4 km/hr (4 times as fast as the runner). when the bird reaches the finish line, it turns around and flies back to the runner. even though the bird is a dodo, we will assume that it occupies only one point in space, i.e., a zero-length bird. how far does the bird travel? (b) after this first encounter, the bird then turns around and flies from the runner back to the finish line, turns around again and flies back to the runner. the bird repeats the back and forth trips until the runner reaches the finish line. how far does the bird travel from the beginning? (i.e. include the distance traveled to the first encounter)