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fiasKO [112]
3 years ago
8

Please help.. urgent Which statement is equivalent to Newton's first law? a. 15,300 N b. 1.20*10^3 N c. 2,030 N d. 1,560 N

Physics
1 answer:
taurus [48]3 years ago
6 0
According to Newton laws of motion, 
F = m*a
Here, m = 1,560 Kg
a = 1.30 m/s²

Substitute their values, 
F = 1,560 * 1.30
F = 2028 N ~ 2030 N  [ Closest value ]

In short, Your Answer would be Option C

Hope this helps!
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What would the final temperature be if 8.94 X 10 3 joules of heat were added to 454 grams of copper at 23.0 o C?
ozzi

Answer: 74.1^0C

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

Q=m\times c\times \Delta T

Q = Heat absorbed=8.94\times 10^3 Joules

m= mass of copper = 454 g

c = specific heat capacity = 0.385J/g^0C

Initial temperature of the copper = T_i = 23.0°C

Final temperature of the water = T_f  = ?

Change in temperature ,\Delta T=T_f-T_i

Putting in the values, we get:

8.94\times 10^3=454\times 0.385\times (T_f-23.0)^0C

T_f=74.1^0C

The final temperature of copper will be 74.1^0C

8 0
3 years ago
An atom emits a photon when one of its electrons:
disa [49]

Answer:

undergoes a transition to a quantum state of lower energy

Explanation:

When electrons in an atom move to another quantum state, they emit/absorb a photon according to the following:

- If the electron is moving to a higher energy state, it absorbs a photon (because it needs energy to move to a higher energy level, so it must absorb the energy of the photon)

- if the electron is moving to a lower energy state, it emits a photon (because it releases the excess energy)

In particular, the energy of the absorbed/emitted photon is exactly equal to the difference in energy between the two levels of the electron transition:

E=|E_1 - E_2|

4 0
3 years ago
Once the crate in sample problem d is in motion, a horizontal force of 53 n keeps the crate moving with constant velocity find t
IgorC [24]
Thank you for posting your question here at brainly. Below is the solution. I hope it helps. 

m=24 kg, Ff=53 N, g=9.8 m/s^2,
use the formula Fg<span> = mg,   F</span>g=24*9.8,
solve for Fg, Fg=235.2 N,
then use the formula Ff<span> = ต</span>kFn, 53=235.2ตk,
solve for ตk, ตk<span>=.23</span>
4 0
3 years ago
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bearhunter [10]

Answer:

The width of the river is  z = 60.62 \ m

Explanation:

From the question we are told that

     The distance of the base line is D = 130 m

       The angle is  \theta =  25^o

A diagram illustration the question is shown on the first uploaded image

    Applying Trigonometric Rules for Right-angled Triangle,

            tan  25 =  \frac{z}{130}

Now making  z the subject

           z = 130 * tan (25)

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8 0
3 years ago
I know the answer but what type of energy is this.
k0ka [10]

Answer:

Elastic potential energy

Explanation:

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