1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
irina [24]
2 years ago
10

A 0.105- kg hockey puck moving at 24 m/s is caught and held by a 75-kg goalie at rest. With what speed does the goalie slide on

the ice after catching the puck? Define the puck and the goalie as a system.
please show work, help
Physics
1 answer:
Veseljchak [2.6K]2 years ago
3 0

Answer:

<u><em>0.03 m/s</em></u>

Explanation:

<em>Applying law of conservation of momentum, </em>

  • <em>m₁v₁ + m₂v₂ = (m₁ + m₂)v</em>
  • <em>0.105(24) + 75(0) = (0.105 + 75)v</em>
  • <em>75.105v = 2.52</em>
  • <em>v = 2.52/75.105</em>
  • <em>v = </em><u><em>0.03 m/s</em></u>
You might be interested in
A 21.7kg child descends a slide 3.5 m high and reaches the bottom with a speed of 2.2m/s. How much thermal energy due to frictio
nadya68 [22]

Answer:

Subtract the kinetic energy at the bottom from the potential energy loss. The remainder becomes frictional heat.

Potential energy loss:

M g H = 21.7*9.81*3.5 = 745.1 J

Kinetic energy at bottom of slide:

= (1/2) M v^2 = 52.5 J

5 0
3 years ago
A ball is projected with an initial velocity of 40 meter per second and reached maximum height of 160 meters calculate tge angle
Andru [333]

There's a problem with the question as given. Even with a maximum projection angle of <em>θ</em> = 90°, the initial velocity is not large enough to get the ball up in the air 160 m. With angle 90°, the ball's height <em>y</em> at time <em>t</em> would be

<em>y</em> = (40 m/s) <em>t</em> - 1/2 <em>g t</em> ²

Set <em>y</em> = 160 m, and you'll find that there is no (real) solution for<em> t</em>, so the ball never attains the given maximum height.

From another perspective: recall that

<em>v </em>² - <em>v</em>₀² = 2<em>a </em>∆<em>y</em>

where

• <em>v</em>₀ = initial velocity

• <em>v</em> = final velocity

• <em>a</em> = acceleration

• ∆<em>y</em> = displacement

At its maximum height, the ball has zero vertical velocity, and ∆<em>y</em> = maximum height = 160 m. The ball is in free fall once it's launched, so <em>a</em> = -<em>g</em>.

So we have

0² - (40 m/s)² = -2<em>g </em>(160 m)

but this reduces to

(40 m/s)² = 2 (9.8 m/s²) (160 m)

1600 m²/s² ≠ 3136 m²/s²

7 0
3 years ago
A train travels 70 kilometers in 1 hours, and then 63 kilometers in 2 hours. What is its average speed?
lozanna [386]
The answer is:  " 44 \frac{1}{3} km " ; 
                              or; write as:  " 44.333 km " .
___________________________________________________________
Explanation:
___________________________________________________________
(70 km + 63 km) ÷ (2 + 1 ) =  133 km ÷ 3 =  " 44 \frac{1}{3} km "  ; 
                                                                            or; write as:  " 44.333 km " .
___________________________________________________________
3 0
3 years ago
A measure of the disorder of a system is called:<br> enthalpy<br> energy<br> entropy<br> synergy
Gre4nikov [31]

The answer is Entropy or part C.


Entropy is basically a thermodynamic quantity that tells the randomness of a system or as said in the question tells us a measure of the disorder of the system.


The second law of thermodynamics states that a closed system has entropy which may remain constant or otherwise might increase.


It is basically the measure of the change of a system or universe when it goes from order to disorder.

5 0
2 years ago
The velocity of a wave is a function of its:<br><br> energy<br> form<br> medium<br> amplitude
algol [13]

Answer:

Amplitude.

Explanation:

The velocity of a wave is given by :

velocity = total distance covered/total time taken

In the case of a wave the total distance covered is equal to the amplitude of a wave. It is the maximum displacement covered by the wave. So, the velocity of a wave is a function of its amplitude. Hence, the correct option is (D).

4 0
3 years ago
Other questions:
  • What helped provide support for the Plate Tectonic theory in the 1960s?
    14·2 answers
  • When a simple magnifying glass is used properly, the image will be formed
    9·1 answer
  • ____________ interference occurs when two waves are out of phase
    12·1 answer
  • Calculate the mean free path of air molecules at a pressure of 7.00×10^−13 atm and a temperature of 303 K . (This pressure is re
    6·1 answer
  • What form of energy does a block of chocolate have?
    11·1 answer
  • A ____ mirror will diverge light rays. <br> a. convex <br> b. plane <br> c. concave
    9·2 answers
  • A spring has a spring constant of 330 n/m. how far is the spring compressed when 150 newtons of force are used?
    13·1 answer
  • Introduction for Home economics project​
    12·2 answers
  • Which best describes cost-effectiveness
    11·1 answer
  • In a perfectly inelastic one-dimensional collision between two moving objects, what condition alone is necessary so that the fin
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!