The chart below shows four teammates targets heart rate zones. their coach had them all using the stair climber each with an average rate at 170 beats per minute. Based on this info who worked at the highest intensity level. ty

Figure 9 on page 362 shows various motions of balls. the curved path followed by the yellow ball in b in picture b is result of a) inertia b) centripetal motion c) gravity and horizontal velocity d) linear motion

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)