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daser333 [38]
3 years ago
11

He graph shows all of the stable isotopes of elements according to the numbers of protons and neutrons in their nuclei.

Physics
1 answer:
pychu [463]3 years ago
9 0

Answer:

A and B i think

Explanation:

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A 97.0 kg ice hockey player hits a 0.150 kg puck, giving the puck a velocity of 48.0 m/s. If both are initially at rest and if t
OverLord2011 [107]

Answer:

s₁ = 0.022 m

Explanation:

From the law of conservation of momentum:

m_1u_1 + m_2u_2 = m_1v_1+m_2v_2

where,

m₁ = mass of hockey player = 97 kg

m₂ = mass of puck = 0.15 kg

u₁ = u₂ = initial velocities of puck and player = 0 m/s

v₁ = velocity of player after collision = ?

v₂ = velocity of puck after hitting = 48 m/s

Therefore,

(97\ kg)(0\ m/s)+(0.15\ kg)(0\ m/s)=(97\ kg)(v_1)+(0.15\ kg)(48\ m/s)\\\\v_1 = -\frac{(0.15\ kg)(48\ m/s)}{97\ kg} \\v_1 = - 0.074 m/s

negative sign here shows the opposite direction.

Now, we calculate the time taken by puck to move 14.5 m:

s_2 =v_2t\\\\t = \frac{s_2}{v_2} = \frac{14.5\ m}{48\ m/s} \\\\t =  0.3\ s

Now, the distance covered by the player in this time will be:

s_1 = v_1t\\s_1 = (0.074\ m/s)(0.3\ s)

<u>s₁ = 0.022 m</u>

4 0
3 years ago
Which of the following is an example of a mechanical wave?
Elanso [62]
D. The noise of a car horn. Hope this helps! Please comment if it does!
5 0
3 years ago
Read 2 more answers
The way roughness of surfaces affects kinetic friction is called the __________ of kinetic friction?
boyakko [2]

Answer:

coefficient

Explanation:

5 0
2 years ago
An airplane flies 1000 miles in 2 hours. What is its average speed in miles per hour?
OLEGan [10]

Answer:

500km per hour

Explanation:

if in 2 hours the airplane flies 1000 km then 1000 divided by 2 is 500km per hour.

5 0
3 years ago
Compared with the amount of current in the filament of a lamp, the amount of current in the connecting wire is A. definitely les
pashok25 [27]

Compared with the amount of current in the filament of a lamp, the amount of current in the connecting wire is

D. the same.

As per the rule, the amount of current in devices connected in series is equal. here in the given situation , the wire is in series with the filament. that is the reason that the current in filament and wire is same.

hence the correct choice is D)

8 0
3 years ago
Read 2 more answers
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