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natali 33 [55]
3 years ago
15

A package was determined to have a mass of 5.7 kilograms. What's the force of gravity acting on the package on earth?

Physics
2 answers:
Arturiano [62]3 years ago
8 0
1.) The force of gravity is what we call weight, we define it as:
w=mg
w=5,7kg*9,8m/s²
w=55,86kg (b)
2.) We know that:
power=W/t
power=50J/20s
power=2,5Watts (a)
3.) The work done is equal to the potential energy, so:
Epg=mgh
Epg=63kg*9,8m/s²*7m
Epg=4321J
Now we get the power:
power=W/t
power=4321J/5s
power=864Watts
Now:
1HP=746Watts
=1,16HP (b)
4.) We know that:
F=ma
350N=m*10m/s²
m=350N/10m/s²
m=35kg (b)
5.) d.) Aceleration is tha rate of change in velocity, either positive (increasing) or negative (decreasing)
Simora [160]3 years ago
7 0
==>  A package was determined . . .

                   Weight = (mass) x (gravity)

Gravity on Earth = 9.8 m/s²

                   Weight = (5.7 kg) x (9.8 m/s²)

                               =  55.86 kg-m/s² .                 1 kg-m/s² = 1 N

==> 50 J of work was performed . . .

     Power = (work done) / (time to do the work)

                 =  (50 J)  /  (20 sec)

                 =    2.5 J/sec                    1 J/sec = 1 watt

==> A 63-kg object needs . . .

       Weight = (mass) x (gravity)
       Work = (force) x (distance)
       Power = (work done) / (time to do the work)

So  Power = (mass) x (gravity) x (distance) / (time to lift)

                   = (63 kg) x (9.8 m/s²) x (7 m)  /  (5 sec)

                   =  (63 x 9.8 x 7) / (5)     (kg-m²/s²) / (sec)

                   =          864.36 joules/sec

Convert                  (864.36 watts) x (1 HP/746 watts)  =  1.159 HP

(How to remember the conversion from watts to Horsepower:
    The sails on Columbus' ship the Santa Maria developed 2 HP at top wind.
     1492 / 2  =  746 watts per HP.  )

==> A force of 350 N  causes . . .

         Force  = (mass) x (acceleration)

         Mass  =  (force) / (acceleration)

                   =  (350 kg-m/s²) / (10 m/s²)

                   =        35 kg.

==> Which of the following . . .

         Golden Rule:  "Acceleration means any change in velocity,
                                   including change in speed or direction."

A).  No.  Constant velocity means zero acceleration.
B).  No.  When people say "decelerating" they mean "slowing down".
               That's decreasing magnitude of velocity.
C). Yes.  'Acceleration' does NOT mean 'speeding up'.   Any change
               in speed or direction, even slowing down, is acceleration.
D). Yes.  If an object's velocity is changing, then either the speed or direction of its motion is changing, and either of those is 'acceleration'.  The object doesn't need to be speeding up or slowing down, but if its direction is changing, then that's called 'acceleration.  Rounding a curve at a constant speed, or driving a circle with constant speed, are both examples of 'acceleration'.
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Answer: Technician B is right.

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How do sea surface temperatures affect evaporation rate?
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The activation of clotting factors will be blocked.
dedylja [7]

With the blocking of activation of clotting factors, the rate of conversion of fibrinogen to fibrin will decrease to a huge extent and this will prevent the clot formation.

Option A

<h3><u>Explanation:</u></h3>

The process of stopping of flow of blood through any wound by formation of a clot is known as blood clotting. The clot in blood is formed by conversion of the fibrinogen protein into its polymer form fibrin which forms a meshwork.

The conversion of fibrinogen to fibrin requires a lot of enzymes and factors present which is required one by one, known as the Cascade theory. Total of 13 factors are required, where there are prothrombin, thromboplastin, and different other factors. Inactivation of any of the 13 factors will lead to less conversion of fibrinogen to fibrin, thereby the rate of conversion will highly decrease.

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2 years ago
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Consider an electrical transformer has 10 loops on its primary coil and 20 loops on its secondary coil. What is the voltage in t
Arlecino [84]

Answer:

240 V

Explanation:

number of turns in primary coil, Np = 10

Number of loops in secondary coil, Ns = 20

Voltage in primary coil, Vp = 120 V

Let the voltage in secondary coil is Vs.

So, Vs / Vp = Ns / Np

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Vs / 120  = 2

Vs = 240 V

Thus, the voltage in secondary coil is 240 Volt.

4 0
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