Which is happening when humans control the breeding of living things to favor certain desired features?

A rock with mass of 5.0 kg is carried up a small hill 10 meters high. how much work had to be done in carrying the rock up hill? w = 490 j 4900 j 245 j impossible to tell because velocity not given

Which change will decrease the speed of a sound wave traveling through a gaseous matter?

A beam of protons is accelerated through a potential difference of 0.725kV and then enters a uniform magnetic field traveling perpendicular to the field. A) What magnitude of field is needed to bend these protons in a circular arc of diameter 1.

Consider a model steel bridge that is 1/100 the exact scale of the real bridge that is to be built. a. If the model bridge weighs 50 N, what will the real bridge weigh? b.

An initially stationary 2.7 kg object accelerates horizontally and uniformly to a speed of 13 m/s in 4.0 s. (a) In that 4.

How much power can I generate while lifting a mass for 30 seconds?

A car is idling at a stoplight. When the light turns green, the car takes 12 seconds to accelerate to 18.7 m/s. What is the average acceleration of the car? 0.64 m/s2 1.6 m/s2 -0.64 m/s2 -1.6 m/s2

A child on a sled starts from rest at the top of a 15° slope. if the trip to the bottom takes 23.9 s how long is the slope? assume that frictional forces may be neglected.

Which si prefix means one one-hundredth (1/100) ?

A sled is being pulled to the left by 5 dogs with 6 newtons of force. Find the net force