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Olenka [21]
3 years ago
7

9. During an egg toss, a catcher must cushion the egg by maximizing the time it takes to stop the

Physics
1 answer:
Lorico [155]3 years ago
8 0

Answer:

the impulse experienced by the egg is 0.053 kgm/s.

Explanation:

Given;

mass of the egg, m = 60 g = 0.06 kg

initial velocity of the egg, u = 6 m/s

height moved by the egg, h = 50 cm = 0.5 m

Determine the final velocity of the egg as it moves upward;

v² = u² + 2(-g)h

v² = u² - 2gh

where;

v is the final velocity

-g is negative acceleration due gravity as it moves upward

v² = 6² - 2(9.8 x 0.5)

v² = 26.2

v = √26.2

v = 5.12 m/s

The impulse applied to the egg is the change in linear momentum;

J = ΔP

ΔP = mu - mv

ΔP = m(u - v)

ΔP = 0.06(6 - 5.12)

ΔP = 0.053 kgm/s

Therefore, the impulse experienced by the egg is 0.053 kgm/s.

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   Speed = (distance covered) / (time to cover the distance)..

From the ground to the highest point,
the rocket's AVERAGE speed is

                     (86 m) / (3.7 sec)  =  23.2 m/s  (rounded) .
5 0
3 years ago
Cindy exerts a force of 40 newtons and moves a chair 6 meters. Her brother Andy pushes a different chair for 6 meters while exer
sesenic [268]
Work formula:
W = F * d
F 1 = 40 N, d 1 = 6 m;
F 2 = 30 N; d 2 = 6 m.
W ( Cindy ) = 40 * 6 = 240 Nm
W ( Andy ) = 30 * 6 = 180 Nm
The difference of their amounts if work:
240 Nm - 180  Nm = 60 nm

hope it helps!
3 0
4 years ago
hot water is added to three times its mass of water at 10 degree celsius and the resulting temperature is 20 degrees Celsius Wha
olchik [2.2K]

Answer:

The initial temperature of the hot water is 50\; \rm ^{\circ} C (assuming that no heat was lost to the surroundings.)

Explanation:

Let m denote the mass of the hot water.

The question states that the mass of the water at 10\; \rm ^\circ C is three times the mass of the hot water. If the mass of the hot water is m, the mass of the cold water would be 3\, m.

Let c denote the specific heat capacity of water. Let m denote the mass of some water. The energy required to change the temperature of that much water by \Delta T (without state change) would be:

Q = c \cdot m \cdot \Delta T.

The temperature change for the cold water was:

\Delta T_1 = 20\; \rm ^{\circ} C - 10\; \rm ^{\circ} C = 10\; \rm K.

Energy required to raise the temperature of water with mass 3\, m from 10\; \rm ^{\circ} C to 20\; \rm ^{\circ} C:

Q_1 = c \cdot (3\, m) \cdot (10\; \rm K).

On the other hand, if the initial temperature of the hot water is t\; \rm ^{\circ} C (where t > 20,) the temperature change would be:

\Delta T_2 = t\; {\rm ^{\circ} C} - 20\; {\rm ^{\circ} C} = (t - 20)\; {\rm K}.

Calculate the energy change involved:

Q_2 = c \cdot m \cdot ((t - 20)\; \rm K).

If no energy was lost to the surroundings, Q_1 should be equal to Q_2. That is:

c \cdot (3\, m) \cdot (10\; {\rm K}) = c\cdot m \cdot ((t - 20)\; {\rm K}).

Simplify and solve for t:

t - 20 = 30.

t = 50.

Therefore, the initial temperature of the hot water would be 50\; {\rm ^\circ C}.

6 0
3 years ago
A drunken sailor stumbles 600 meters north, 550 meters northeast, then 500 meters northwest. What is the total displacement and
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We will make a graph to better understand the displacement of the individual. From the trigonometric properties we will find the required distances.

d_1 = \frac{450}{\sqrt{2}} = 318.198

d_2 = \frac{400}{\sqrt{2}} = 282.843

D = 500+d_1+d_2 = 1101.041

Displacement ,

x = \sqrt{1101.041^2+(318.198-282.843)^2}}

x = 1101.608m

The angle would be

\theta = cos^{-1} (\frac{1101.041}{1101.608})

\theta = E 1.838\° N

Therefore the displacement was of 1101.608m to a angle of 1.838° from East to North.

7 0
3 years ago
You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the doo
ch4aika [34]

Answer:

By watching in the door lock

5 0
3 years ago
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