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3241004551 [841]
2 years ago
8

During a spontaneous fission reaction, net energy ____

Physics
1 answer:
oee [108]2 years ago
7 0
An atoms nucleus splits into two smaller nuclei and generally one or more neutrons.
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Is The force of friction always opposite to the motion? ​
Taya2010 [7]

Answer:

Friction force always acts tangent to the surface at points of contact. Friction force acts opposite to the direction of motion.

Explanation:

8 0
4 years ago
A pendulum has a period of 1.69 s on earth. what is its period on mars, where the acceleration of gravity is about 0.37 that on
love history [14]
The formula for the period of the pendulum is
T=2 \pi  \sqrt{ \frac{L}{g} }=
where L is the pendulum's length and g the gravitational acceleration.

Labeling with E the Earth and with M Mars, we can write the period of the pendulum on Earth as
T_E = 2 \pi  \sqrt{ \frac{L}{g_E} }
and the period of the pendulum on Mars as
T_M = 2 \pi  \sqrt{ \frac{L}{g_M} }

if we calculate the ratio, we get
\frac{T_M}{T_E}=  \sqrt{ \frac{g_E}{g_M} }
but we know that the gravitational acceleration on Mars is 0.37 times the gravitational acceleration on Earth:
g_M = 0.37 g_E
Substituting into the formula, we find
\frac{T_M}{T_E}= \sqrt{ \frac{1}{0.37} }=1.64
And so, the period of the pendulum on Mars is
T_M = 1.64 T_E = 1.64 (1.67 s)=2.78 s
8 0
3 years ago
Read 2 more answers
Am I right? be honest
Bas_tet [7]

Answer:

I chose c because it is the greater slope at point c

5 0
3 years ago
A light-rail commuter train blows its 200 Hz horn as it approaches a crossing. The speed of sound is 339 m/s. (a) An observer wa
ddd [48]

Answer:

a) 30.82 m/s

b)  183.33 Hz

Explanation:

a)

V = speed of the sound = 339 m/s

v = speed of the train = ?

f' = observed frequency by the observer = 220 Hz

f = actual frequency of the observer = 200 Hz

using the equation

f' = \frac{fV}{V - v}

220 = \frac{(200)(339)}{339 - v}

v =  30.82 m/s

b)

V = speed of the sound = 339 m/s

v = speed of the train = 30.82 m/s

f'' = observed frequency by the observer as train moves away = ?

f = actual frequency of the observer = 200 Hz

using the equation

f'' = \frac{fV}{V + v}

f'' = \frac{(200)(339)}{339 + 30.82}

f'' = 183.33 Hz

3 0
3 years ago
Calculate the force, when a object acelerattes to 30 m/s^2 and have a mass of 40 kg
faust18 [17]

Hello!

Use the <u>second law of Newton:</u>

F = ma

Replacing:

F = 40 kg * 30 m/s^2

Resolving:

F = 1200 N

The force is <u>1200 Newtons.</u>

3 0
3 years ago
Read 2 more answers
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