PHYSICS HIGH SCHOOL

Which statement BEST describes why warm ocean currents are usually surface currents? A) Warm water is less dense than cold water.
B) Ocean tides bring warm water to the surface.
C) Warm water contains more salt than cold water.
D) Ocean water loses heat to the air at the surface.

Answers

Answer 1
Answer: I think it is B because it seems like the most valid choice.
Answer 2
Answer:

Answer:

The answer is A because the less dense the water is the more closer to the surface it will be and when heated by the sun, it increases the temperature of surface currents.

Explanation:

I took the test, hope this helped!

Related Questions

A transport truck pulls on a trailer with a force of 600N [E]. The trailer pulls on the transport truck with a forceA)of zero b) of less than 600 N is the truck is slowing down c) equal to 600 N only if the truck is moving at constant velocity d) equal to 600 N no matter what the acceleration of the truck e) greater than 600 N if the truck is accelerating
A soda bottle is flexible enough that the volume of the bottle can change even without opening it. If you have an empty soda bottle (volume of 2.0 L) at room temperature (25 0C), what will the new volume be if you put it in your freezer (-4.0 0C)?
A ball is projected vertically upwards from the top of a tower 60 meters high with a velocity of 30m/s.what is the maximum height above the ground level? How long does it take to reach the ground?
A signal from the nervous system that is sent from the brain to the hand would follow a different pathway than a signal sent from the hand to the brain.
If you had two forces, one with a magnitude of 25 N and the the other with a magnitude of 100 N, what would be the maximum net force these forces could exert on an object?

Contrast generators and electric motors.

Answers

Answer:

A generator produces electricity when a conducting wire is rotated between magnetic field. Mechanical energy is converted to electrical energy. Fleming's right hand rule is used.

An electric motor does mechanical work using electrical energy. A current carrying coil is placed in magnetic field. A torque is exerted on the coil and it rotates. Electrical energy is converted to mechanical energy. Fleming's left hand rule is used.
generators take mechanical and output energy. electric motors take the input of electricity. 

A crane raises a 150 N weight to a height of 2.0 m in in 5.0 s. The crane does work at a rate of

Answers

The work done is (force) x (distance) = (150N) x (2m) = 300 joules.

The crane does the work at the rate of (300 J) / (5 sec) = 60 joules per second.

That rate ... (work done) / (time to do the work) ... is called power.

That 60 joules per second is called 60 watts .

Answer:

60. W

Explanation:

60 Watts

What is the sequence of the energy transformations that occur in a nuclear reactor

Answers

Nuclear reactors use uranium, consisting of solid ceramic pellets. The uranium atoms split through the process of fission which produces heat energy. Nuclear power plants obtains the heat needed to form steam that rotates the turbine to produce electrical energy which is being distributed to houses wherein electrical energy is utilized to different appliances.

Answer:

the answer is b

Explanation:

Solar cells convert what type of energy into electrical energy and why? A. electromagnetic
B. nuclear
C. chemical
D. thermal

Answers

Solar cells convert electromagnetic energy into electrical energy. 

Two men decide to use their cars to pull atruck stuck in mud. They attach ropes and
one pulls with a force of 515 N at an angle
of 31◦ with respect to the direction in which
the truck is headed, while the other car pulls
with a force of 926 N at an angle of 25◦ with
respect to the same direction. What is the net forward force exerted on
the truck in the direction it is headed?

Answers

The net forward force =(  515 cos 31deg ) +( 926 cos 25 deg )
                                   = 441.44N                + 839.24 N
                                   = 1280.7N in truck direction
Is 1280.7N because u have 926(515) =441.44 n 839.24n.

A grasshopper jumps and accelerates at 4.5 m/s2. If its legs exert a force of 0.062 N during the jump, what is the mass of the grasshopper?

Answers

Answer:

0.014 kg

Explanation:

trust me its right i took the assessment and got 100%.  :)
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