Explain the difference between mass and weight for objects on earth and on the mooon

Answers

Answer 1
Answer:

Explanation:

The amount of matter contained inside a body is called its mass while the weight of a body is the gravitational force with which it is attracted towards the earth.

Weight, W = mg

m is the mass and g is acceleration due to gravity  

The mass of the object on the moon remains the same but the weight of the body is reduced to one sixth. This is because the moon's gravity is less than the earth's gravity.            

Hence, this is the main difference in the weight of the object on the earth and on the moon.                                    

Answer 2
Answer: Mass stays the same no matter what, weight however is affected by gravity and will be different on the moon than on earth.

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A hobo hops a freight train traveling at 2.5 m/s due east. The man boards the train from the rear of the boxcar and walks from the southwest corner to the north east corner of the car at a rate of 5.0 m/s. The boxcar is 15 meters long and 3 meters wide. What is the velocity of the man relative to the train tracks?

Answers

Since it isn't specified, I have to assume that when he's walking inside, along
the diagonal of the car, at 5m/s, that speed is relative to the floor of the car. 
The reason I have to assume that is because I think it makes the problem
easier.  I could be wrong.  And it's still troubling, because 5 m/s is a hefty
11.18 mph, which is a pretty energetic walk.  (In fact, it's a 5min 22sec mile,
which I for one never accomplished, even when I was running.)  But so be it.

-- The length of the car's diagonal is √(3² + 15²) = √(9 + 225) = √334

-- The angle of his walk along the diagonal is the angle whose tangent is 3/15.

-- His velocity consists of the components [ 5 cos(angle) east ] and
[ 5 sin(angle) north ].

That's [ 5 x 15/√334 east ] and  [ 5 x 3/√334 ] north .

The train's motion adds to the easterly component of his velocity,
and that becomes [ (2.5) + (5 x 15/√334) ] .  The train's motion has
no effect on the northerly component of his velocity.

So now we're ready to put the components together and find his velocity
relative to the tracks.  I think it'll be easier to go ahead and get the numerical
value of each component, and then combine them.

Easterly component:  (2.5) + (5 x 15/√334)  = 6.6038 m/s

Northerly component: 5 x 3/√334 = 0.8208 m/s

Just before finding the magnitude, we note that the direction of his velocity
is (the angle whose tangent is 0.8208/6.6038) north of east. That's about
7.085 degrees north of east ...the compass bearing of 82.92 degrees.

Now for the magnitude.  It's the square root of the sum of the squares of
the easterly component and the northerly component.

√ (6.6038² + 0.8208²) = √44.2841 = 6.655 m/s

(All numbers are rounded.)

That's my story, and I'm sticking with it.



In a laboratory experiment, an ultrasound detector located at D is used to measure the distances of two moving objects, P and Q. At a certain moment, P and Q are located as shown in the diagram. What is distance PQ?. a) 6.82. b)5.66. c)4.74. d)4.24. e)3.89. .

Answers

Triangle PDQ has: 

     Side "p" is opposite Angle P 

     Side "d" is opposite Angle D = 45º + 23º = 68º 

     Side "q" is opposite Angle Q 


Use the Law of Cosines: 

         d²  =  p²  +  q²   −   2 • p • q • cos(D) 

         d²  =  (4.24)²  +  (4.24)²   −   2 • (4.24) • (4.24) • cos(68º) 

         d²  =  2(4.24)²   −   2(4.24)² • cos(68º) 

         d²  =  2(4.24)² • [ 1 – cos(68º) ] 

         d  =  4.74 ft

The distance PQ is 4.74 feet.

Calculations and Parameters:

Triangle PDQ has:

  •     Side "p" is opposite Angle P
  •     Side "d" is opposite Angle D = 45º + 23º = 68º
  •     Side "q" is opposite Angle Q

If we use the Law of Cosines:

d²  =  p²  +  q²   −   2 • p • q • cos(D)

d²  =  2(4.24)² • [ 1 – cos(68º) ]

d  =  4.74 ft

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How much time would it take for an airplane to reach its destination. If it traveled at an average velocity of 790km/hr east for a distance of 4,700 kilometres

Answers

It would be 5.94 hours but you can round it to just 6 hours.

Water sticking to the surface of a leaf is an example of ______.

Answers

 Water sticking on the leaf is Cohesion Bond

A student wants to build a circuit with four light bulbs and one bell. A student wants to place a switch in the circuit so that only one light will still be on and the bell will still ring when the switch is opened

Answers

Answer:

we have an circuit with two branches in parallel,

* One formed by the switch and three light bulbs

* Another branch formed by a light bulb and the bell

Explanation:

For the construction of the circuit, let us analyze the conditions given, of the 4 light bulbs, only one should remain lit when the dapple is opened, so we must place three light bulbs and the switch in one branch and the other light bulb in the other branch.

For the bell to sound with the abort circuit it must be on the branch where the single bulb is.

Therefore we have an circuit with two branches in parallel,

* One formed by the switch and three light bulbs

* Another branch formed by a light bulb and the bell

Use Newton’s First Law of Motion and the concept of inertia to explain what happens to a person in a head-on car accident who is not wearing a seat belt. How does wearing a seat belt help?

Answers

According to Newtons first law of motion, a passenger tends to continue in the state of uniform motion even after the accident which causes the passenger to move forward.

According to the Newtons first law of motion, an object will continue in a state of rest or uniform motion unless it is acted upon by an external force. This is also known as the law of inertia.

While in a car undergoing uniform motion and suddenly the car is involved in an accident which causes the vehicle stop abruptly, a person suddenly moves forward because of the tendency to continue in the former state of uniform motion according to Newtons first law.

A seat belt helps to prevent the person from suddenly moving forward in a way that may lead to injury as a result of the accident.

Learn more: brainly.com/question/974124

Answer:

Newtons first law of motion explains what happens in a car crash because it basically states that the passenger will continue to travel at the same velocity until an unbalanced force acts on he or she. The force that will act upon he or she would be the window, so you should always wear a seat belt!

Explanation: