Why is a convex lens useful for starting fires

Many people are familiar with the fact that a rifle recoils when fired. This recoil is the result of action-reaction force pairs. A gunpowder explosion creates hot gases which expand outward allowing the rifle to push forward on the bullet.

From the list below, select the major disadvantages of manned space missions. a. cost b. danger c. risk of human error d. negative media coverage e. lack of qualified astronauts

Ksp for agbr is 5x10-13. what is the maximum concentration of silver ion that you can have in a 0.1 m solution of nabr?

A certain wave motion has a frequency of 10 cycles / s and a wavelength of 3 m. so its propagation speed is

A bartender slides a mug of beer along a bar to a customer. The mug starts with a speed of 1.00 m/s, but by the time it reaches the customer's hand, it has slowed to 0.25 m/s. If the filled mug has a mass of 0.

Why is no energy required in passive transport?

Caleb is often described as absent-minded or forgetful. He would likely benefit from

If you lift a five pound object 18 inches how many joules of energy did yo use?

A temperature of 20°C is equal to °F.

Technician A says that when a fuse has popped, it just needs to be replaced, since it performed its job. Technician B says that when a fuse has blown, the circuit needs to be diagnosed because the fuse was probably not the problem. Who is correct? A.