Two railway trucks of masses m and 3m move towards each other in opposite directions with speeds 2v and v respectively. These trucks collide and stick together.

What is the speed of the trucks after the collision?

A

v/4

B

v/2

C

v

D

5v/4

The primary (low-voltage) ignition system must be working correctly before any spark occurs from a coil. Which component is NOT in the primary ignition circuit?

Two electromagnets are running with equal amounts of electric current. Electromagnet A uses a piece of iron as its metal core, while electromagnet B uses a piece of silver. Which one would have a stronger magnetic field?

There was less work done. Which of the statements describes how this is possible?

In the diagram, ∠D is b A) the angle of incidence B) the angle of refraction C) the complement of the angle of reflection D) the complement of the angle of refraction described as which of these?

Un elicottero si muove alla velocità di 95 km/h parallelamente al suolo. Dopo 35 secondi, ha deviato la sua rotta di 35 gradi, raggiungendo una velocità di 72 km/h. Calcola il modulo della variazione di velocità.

Which of the following statements about Boyle's law are correct? The temperature and pressure must remain constant for the law to apply. The temperature and the number of molecules must remain constant for the law to apply.

Exposure to high energy electromagnetic radiation such as waves can cause cancer sterility and death

What kind of error would result if you read the liquid volume where the liquid touches the wall of the cylinder rather than at the meniscus

A long, thin rod parallel to the y-axis is located at x=-1.0 cm and carries a uniform linear charge density of + 1.0 nc/m. a second long, thin rod parallel to the z-axis is located at x=+1.0 cm and carries a uniform linear charge density of - 1.

A meter is measured in?