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3 years ago

An atom’s mass number equals the number of

Physics

2 answers:

steposvetlana [31]3 years ago

8 0

An atom's mass number equals the number of protons plus the number of neutrons.
Hope this helps! (:

oksian1 [2.3K]3 years ago

4 0

b. protons plus the number of neutrons.

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A high-speed train travels 480 km from Paris to Grenoble, France, at an average speed of 180 km/h. How long will it take to reac

hichkok12 [17]

The time (t) it will take for the train to reach to Grenoble is the quotient when the distance (d) is divided by the speed (s). That is,
t = d / s
Substituting the known values,
t = 480 km / 180 km/h
t = 2.667 h
Thus, it will take approximately 2.7 h to reach Grenoble. The answer is letter D.

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3 years ago

The drawing shows a model for the motion of the human forearm in throwing a dart. Because of the force M applied by the triceps

Serga [27]

Answer:

464.3 N

Explanation:

Given parameters are:

I = 0.065 $kg*m^2$

L = 0.025 m

R = 0.28 m

$v_0$ = 0 m/s

$v_f$ = 5 m/s

t = 0.1 s

$v_f=v_0+at=at$

Hence, $a=v_f/t$

We must connect two torque equations to find the answer.

$\tau=LM=I\alpha$

Where $\alpha =\frac{a}{R} =\frac{v_f}{Rt}$

Hence, $LM=I\frac{v_f}{Rt}$

Thus, $M = \frac{Iv_f}{LRt} = \frac{0.065*5}{0.025*0.28*0.1} =464.3$ N

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4 years ago

Which is best supported by the data in the chart? Current W flows at a higher rate than Current Z. Current Y flows at a lower ra

LekaFEV [45]

There is no chart provided in this statement. However, the current that flows within an electrically charged item is dependent on how it is arranged. There are two kinds of current and these are, parallel and circuit currents. Current that flows in parallel current is less than when it is farther away from the electric source; current that flows in a series current flows at a constant rate regardless of how far it is from the electrical source.

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3 years ago

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Dafna1 [17]

If the plane is far away and flying directly toward or away from
the girl, the plane would appear not to be moving. Also, the plane
would not be moving in the frame of reference of the people on
the plane. If you are matching speed and direction of the plane.

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3 years ago

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Two people, one with mass m1 and the other with mass m2, stand on a stationary sled with mass M on a frozen lake. Assume that th

lozanna [386]

Answer:

Part a)

Velocity of sled

$v = \frac{m_1 s}{m_1 + m_2 + M}$