A scientist on Earth drops a hammer and a feather at the same time, and an astronaut on the moon drops a hammer and a feather. Which statement is true? a) The feather falls faster on Earth. b) The hammer falls faster on the moon. c) The feather falls faster on the moon. d) The hammer and feather fall at the same rate on the moon.

Answers

Answer 1
Answer: I think it is d because no matter what object you do, no matter the mass, they will fall at the same time. I think this may happen because of gravity.

Hope this helps!

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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?

Brownian motion cannot be detected in colloids. True or false?

Answers

Brownianmotion is the random movement of colloidal particles suspended in a fluid. It iscaused by random collisions of the molecules in the fluid medium. The particlesin the solution or colloids are in constant random movement. A colloid hasproperties boundary to a homogenous and heterogeneous mixture. However inBrownian movement, the larger the size of a particle, the lesser its motion andthe smaller the size of the particle, the higher is motion. Colloids in generalhave larger particle size and therefore it Brownian motion is sluggish. The statementis false.

You ran 400 meters in 2 minutes what is your speed

Answers

The speed of an object is the distance divided by the time of travel. The speed of the person running 400 meters in 2 minutes is 3.3 m/s.

What is speed?

Speed is a physical quantity used  to measure the distance covered per unit time. Speed is a scalar quantity thus, having magnitude only. The rate of speed is called velocity. Velocity is a vector quantity.

Speed in physics is the ratio of the distance covered per unit time. Thus, speed can have the units m/s, Km/hr, ft/s miles/s etc. As the time of the travel increases, speed is said to be decreasing.

The distance covered  = 400 meters.

time = 2 minutes = 2 × 60 s = 120 s

Speed = distance / time

           = 400 m/ 120 s

           = 3.3 m/s.

Therefore, the speed is 3.3 m/s.

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Answer:

3.3m/s

Explanation:

speed =Distance /Time

x=400m

t=2mintues=2min*60sec/min=120seconds

S=400m/120s

S=3.33333...

therefore speed = 3.3m/s

Is an object moving in uniform circular motion accelerating?

Answers

Yes.

-- 'Acceleration' does NOT mean 'speeding up'.
It means ANY change in the speed OR direction of motion ...
speeding up, slowing down, or turning.

-- If an object is NOT moving in  straight line at constant speed,
then its motion is accelerated.

-- In circular motion, or even just going around a curve,
the object is accelerating, because its direction is constantly
changing, even if its speed is constant.

Wich is a scalar quantity
(1)velocity (2)speed (3)acceleration (4) displacement

Answers

Speed is the only one on the list
that doesn't have a direction.

Evaporation only occurs at the surface of a liquid

Answers

yes

evaporation starts on the surface

Select all of the answers that apply.Thermohaline circulation is driven by _____.
density
salinity
temperature
wind
Coriolis effect

Answers

The correct answer for the question that is being presented above is this one: "density, salinity, temperature." Movement of deep ocean water driven by differences in temperature, salinity, and density cause the Thermohaline circulation. Thermohaline circulation is a part of the large-scale ocean circulation that is driven by global density gradients created by surface heat and freshwater fluxes.

Final answer:

Thermohaline circulation is driven by density, salinity, and temperature. These factors cause changes in the water's density, leading to the creation of ocean currents.

Explanation:

Thermohaline circulation is primarily driven by density, salinity, and temperature. Salinity and temperature affect the density of ocean water, with higher salinity and lower temperature leading to a denser substance. When water in an area of the ocean becomes denser than the surrounding water, it sinks, creating a current. This process is global, meaning it involves the entire ocean system and thus is an essential part of Earth's climate.

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