Answer:

**Answer:**

**Explanation:**

To solve this problem we use the **Momentum's conservation Law**, before and after the girl catch the ball:

(**1)**

At the beginning the girl is **stationary**:

** (2)**

If the girl **catch** the ball, both have the same speed:

**(3)**

We replace (2) and (3) in (1):

We can now solve the equation for v_{f}:

The tensile strength (the maximum tensile stress it can support without breaking) for a certain steel wire is 3000 MN/m2. What is the maximum load that can be applied to a wire with a diameter of 3.0 mm made of this steel without breaking the wire?

A helicopter is hovering above the ground. Jim reaches out of the copter (with a safety harness on) at 180 m above the ground. A package is launched upward, from a point on a roof 10 m above the ground. The initial velocity of the package is 50.5 m/s. Consider all quantities as positive in the upward direction. Does Jim Bond have a chance to catch the package? (calculate how high will it go)

A flat circular coil having a diameter of 25 cm is to produce a magnetic field at its center of magnitude, 1.0 mT. If the coil has 100 turns how much current must pass through the coil?

If you see Sagittarius high in your night sky on June 20 and today is your birthday, what is your zodiac constellation?

At a given instant the bottom A of the ladder has an acceleration aA = 4 f t/s2 and velocity vA = 6 f t/s, both acting to the left. Determine the acceleration of the top of the ladder, B, and the ladder’s angular acceleration at this same instant.

A helicopter is hovering above the ground. Jim reaches out of the copter (with a safety harness on) at 180 m above the ground. A package is launched upward, from a point on a roof 10 m above the ground. The initial velocity of the package is 50.5 m/s. Consider all quantities as positive in the upward direction. Does Jim Bond have a chance to catch the package? (calculate how high will it go)

A flat circular coil having a diameter of 25 cm is to produce a magnetic field at its center of magnitude, 1.0 mT. If the coil has 100 turns how much current must pass through the coil?

If you see Sagittarius high in your night sky on June 20 and today is your birthday, what is your zodiac constellation?

At a given instant the bottom A of the ladder has an acceleration aA = 4 f t/s2 and velocity vA = 6 f t/s, both acting to the left. Determine the acceleration of the top of the ladder, B, and the ladder’s angular acceleration at this same instant.

**Answer:**

14.7 psi is equal to 19051.2 pounds per square yard.

**Explanation:**

Dimensionally speaking, a square yard equals 1296 square inches. Therefore, we need to multiply the atmospheric pressure by 1296 to obtain its equivalent in pounds per square yard. That is:

14.7 psi is equal to 19051.2 pounds per square yard.

**Answer:**

b) 16 cm

Magnification, m = v/u

3 = v/u

⇒ v = 3u

Lens formula : 1/v – 1/u = 1/f

1/3u = 1/u = 1/12

-2/3u = 1/12

⇒ u = -8 cm

V = 3 × (-8) = -24

Distance between object and image = u – v = -8 – (-24) = -8 + 24 = 16 cm

**Explanation:**

7500 J were released in the explosion, how much kinetic energydid

each piece acquire?

**Answer:**

4500 J and 3000 J

**Explanation:**

According to conservation of momentum

Given that m_2 = 1.5 m_1 , so

the kinetic energy of each piece is

substituting the value of V1 in the above equation

Given that

K_1 + k_2 = 7500 J

1.5 K_2 + K_2 = 7500

K_2 = 7500 / 2.5

= 3000 J

this is the KE of heavier mass

K_1 = 7500 - 3000 = 4500 J

this is the KE of lighter mass

The question is about finding the kinetic energy acquired by each of two pieces of an object following an internal explosion, using principles of conservation of energy and momentum in physics.

The student has asked about an **internal explosion** that breaks an object into two pieces with different masses, releasing a certain amount of **kinetic energy** in the process. This question involves applying the principle of conservation of energy and momentum to find the kinetic energy acquired by each piece post-explosion.

Assuming piece 1 has a mass of *m* and piece 2 has a mass of 1.5*m*, the total mass of the system is 2.5*m*. Since 7500 J of energy was released in the explosion, to find the kinetic energy of each piece, we can use the fact that the total kinetic energy is equal to the energy released during the explosion. Let the kinetic energy of the smaller piece be *K**1* and of the larger piece be *K**2*. Because the object was initially at rest and momentum must be conserved, the momenta of the two pieces must be equal and opposite. This relationship allows us to derive the ratio of the kinetic energies. We can solve for *K**1* and *K**2* proportionally. Finally, because the kinetic energy is a scalar quantity, adding the kinetic energies of the two pieces will equal the total energy released.

#SPJ3

**Answer:**

https://youtu.be/stW-C7F7QOg

**Answer:**

**3 min 55 sec is the solidification time if the cylinder height is doubled**

**7min 40 sec if the diameter is doubled**

**Explanation:**

see the attachment

(2) Charged molecular fragments are broken off one tape and transferred to another.

(3) Electrons are pulled out of molecules in one tape and transferred to another tape.

(4) Neutrons are pulled out of nuclei in one tape and transferred to another tape.

**Answer:**

2 and 3

**Explanation:**

The right answer is the option 2 and 3,

This is all about the electrons transfer from one material to the other material.

For example if the electrons in the valence shell of one material are loosely attached then the other material's atoms try to take those electron to complete their shells and that is how the charges transfers from one another.

And it could also be happen as in option 2.