Recent content by Manh

Homework Statement Two solid spheres hung by thin threads from a horizontal support (Figure 1) are initially in contact with each other. Sphere 1 has inertia m1 = 0.040 kg , and sphere 2 has inertia m2 = 0.10 kg. When pulled to the left and released, sphere 1 collides elastically with sphere 2...

Homework Statement A student runs an experiment with two carts on a low-friction track. As measured in the Earth reference frame, cart 1 (m = 0.57 kg ) moves from left to right at 1.0 m/s as the student walks along next to it at the same velocity. Let the +x direction be to the right. A. What...

A. U1 = (1.5 kg)(9.8 m/s^2)(0.6 m) = 8.82 J U2 = (3 kg)(9.8 m/s^2)(-0.6 m) = -17.64 J delta U = -17.64 J + 8.82 J = -8.82 J B. delta K = 8.82 J C. K = 1/2 m1*v1^2 + 1/2 m2*v2^2. Where K = 8.82 J. Is this correct?

Homework Statement Two blocks are hung by a string draped over a pulley, a 1.5-kg block on the left and a 3.0-kg block on the right. The two blocks start out at rest and at the same height. A. What is the change in the gravitational potential energy of the system of blocks and Earth when the...

For part A, According to the conservation of momentum, I picked a) The momentum of the wood is equal to the initial momentum of the bullet. Also, I see the wood does not move and remains at rest and therefore it may have a zero of momentum. The answer could be b) The momentum of the wood is less...

Yes. The question is "What is the change in velocity of the car due to its encounter with the bug?". I also came up with an answer but it was incorrect.

Homework Statement A small bullet is fired into a large piece of wood. After the bullet penetrates the wood, the assembly moves as one unit along a low-friction track in the direction of travel of the bullet. A. After the bullet is stuck in the piece of wood, is the momentum of the wood (not...

Homework Statement You are driving your 1000-kg car at a velocity of(25 m/s )ι^ when a 9.0-g bug splatters on your windshield. Before the collision, the bug was traveling at a velocity of (-1.5 m/s )ι^. What is the change in velocity of the car due to its encounter with the bug? Homework...

Can you guide me how to do that? I know that the total mass of the atom and particle is 1.66 × 10^−27 kg and velocity of the atom is -2.1 × 10^5 m/s. These given values may be plugged into an equation, right?

So, what am I supposed to do since I only know the formula of kinetic energy?

How much of the uranium atom's internal energy is released in the breakup? Express your answer to three significant digits and include the appropriate units.

Homework Statement A uranium-238 atom can break up into athorium-234 atom and a particle called an alpha particle, α-4. The numbers indicate the inertias of the atoms and the alpha particle in atomic mass units (1 amu = 1.66 × 10^−27 kg). When an uranium atom initially at rest breaks up, the...

I wonder if you are counting # of C in this order like this:

Homework Statement Give the IUPAC name for the following compound. Homework EquationsThe Attempt at a Solution However, the 4 and 7 were incorrect in the blanks. I'm not sure what went wrong.

I would check my answer again. Thanks!