Qob What is the current (in Amps) through the component when the potential difference across the component is 0.8 volts?

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Arope has one end tied to a vertical support. you hold the other end so that the rope is horizontal. if you move the end of the rope back and forth with a frequency of 4 hz, the transverse wave you produce has a wavelength of 0.5 m. what is the speed of the wave in the rope?