A238 92u nucleus is moving in the x-direction at 5.0 × 105 m/s when it decays into an alpha particle 4 2he and a 234 90th. if the alpha particle moves off at 21.2° above the x axis with a speed of 1.4 × 107 m/s, what is the recoil velocity of the thorium nucleus? assume the uranium-thorium-alpha system is isolated; you may also assume the particles are pointlike.

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?

An astronaut floating in space is trying to use her jetpack to get back to her space station, but she is being pulled away by a nearby planet, as shown in the image below. her jetpack provides a constant thrust of 310 n. if she angles her jetpack in such a way that it cancels out the vertical force due to the planet's gravity, what is her net horizontal force? thaud 487 o a. 54.8 n toward the space station o b. 212.9 n toward the space station o c. 185.2 n toward the space station o d 956 n toward the space station

Acircuit contain a 5-ohm,a3-ohm,and an 8-ohm resistor in series. what is the total resistance of the circuit