Which of the following best describes work being done by someone's arms?

a. a child building a sand castle

b. a mother holding a baby

c. a boy pushing on a tree

d. a traveler carrying luggage

An ampere is the si unit of which of the following? a electric power, b electric current, c resistance, d electric potential difference

A current carrying wire wrapped around an iron ore is called a

What characteristic determine the classification of an organism in domains?

Consider a 2100-kg car cruising at constant speed of 70 km/h. Now the car starts to pass another car by accelerating to 110 km/h in 5 s. Determine the additional power needed to achieve this acceleration.

A 35kg child moves with uniform circular motion while riding a horse on a carousel. The horse is 3.2m from the carousel's axis of rotation and has a tangential speed of 2.6 m/s. What is the child's centripetal acceleration?

Difference between force and weight

Which of the following best describes work being done by someone's arms? a. a child building a sand castle b. a mother holding a baby c. a boy pushing on a tree d. a traveler carrying luggage

A hockey puck has a mass of 0.121 kg and is at rest. a hockey player makes a shot, exerting a constant force of 32.5 n on the puck for 0.16 s. with what speed does it head toward the goal? m/s

Which is an example of convection

Before radiant energy can be converted to thermal energy, it must be changed to what