If your heart is Not Strong enough or effiecent wnough it is difficult to

A) Strech

B) lift weights

C) Breathe

D) prespire

An aerobatic airplane pilot experiences weightlessness as she passes over the top of a loop-the-loop maneuver. The acceleration of gravity is 9.8 m/s 2 . If her speed is 320 m/s at this time, find the radius of the loop. Answer in units of km.

Calculate the equivalent of 20 degrees Celsius in degrees Fahrenheit and Kelvin.

A small sphere with mass 5.00.*10-7kg and charge + 3.00μC is released from rest a distance of 0.600 m above a large horizontal insulating sheet of charge that has uniform surface charge density σ=+8.00pC/m2.

What is the acceleration of a 10 kg mass pushed by a 5 N force?

How does the nucleus of a copper atom compare to the nucleus ofa nickle atom?

A CFL bulb has an efficiency of 8.9% and a power of 22 W. How much light energy does the lightbulb produce in 1 second

Which of the following is true of high clouds?

A ferris wheel takes 5 minutes to complete one full rotation, what is the angular velocity of the ferris wheel

A heat engine has a thermal efficiency of 45%. how much power does the engine produce when heat is transferred into it at a rate of 109 kj/hr?

Dos pelotas de tenis se lanzan verticalmente, hacia arriba y desde el mismo punto, con 2 s de diferencia. La velocidad inicial de la primera es de 20 m/s, y la de la segunda, de 30 m/s.