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ella [17]
3 years ago
12

ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements. An object on earth ha

s a mass of 4 kg. Calculate its weight on another planet that has an acceleration due to gravity one-half that of the earth. w2 = N
Physics
1 answer:
kirza4 [7]3 years ago
8 0

Answer:

19.6 kg*m/s^2 = 19.6 N

Explanation:

Weight is mass times acceleration due to gravity.  And hopefully you know that acceleration due to gravity on earth is 9.8 m/s^2  So what is half of that?  4.9.  So now the calculation is super simple.

mass = 4 kg and acceleration = 4.9 m/s^2 so now we multiply these two numbers and get 19.6 kg*m/s^2.  kg*m/s^2 is also known as Newtons, abbreviated with an N so the final result is 19.6 N.  

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How does the mass effect the gravitational force between objects?.
Anna11 [10]

Answer: Since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. So as the mass of either object increases, the force of gravitational attraction between them also increases.

6 0
3 years ago
In the nucleus ______________<br> tell cells what to do and how to change.
anyanavicka [17]

Answer:

i believe it is dna

Explanation:

if i remember correctly if the dna tells the cell what to do and how to do it

7 0
3 years ago
Select the correct answer.
Monica [59]

Answer:

A. The speed of the wave increases four times.

3 0
3 years ago
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What is the year in which j.J. Thomson discovered the electron?
kow [346]

1897 Because he was doing an experiment at that time .

3 0
3 years ago
A parallel circuit contains four identical lamps. The current through the energy source is 4 A. The total resistance of the circ
TEA [102]

Answer:

b. 40V , 40V

Explanation:

Connections are as per the figure.

As total current through source is 4A , current through each lamp is 1A.

As total resistance of the circuit is 10Ω ,resistance of each bulb is 40Ω because in case of a parallel circuit in which identical objects are connected , R_{eff} = \frac{R}{n} where R is the resistance of each bulb and n is the number of bulbs.

As per Ohm's law , voltage of the source =IR = 4×10 =40V.

We can see from the figure that if the voltage across the source is 40V , the voltage across each bulb is also 40V.

7 0
4 years ago
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