Answer:
the answer is fulcrum because
Explanation:
lever is a simple machine consisting of a bar that rotates around a fixed point. The fixed point of a lever is called the fulcrum. Like other machines, a lever makes work easier by changing the force applied to the machine or the distance over which the force is applied
Answer:
change of momentum does not depend on the mass of the cars, as the force and time are the same all vehicles have the same change of momentum
Explanation:
Let's look for the speed of the car
F = m a
a = F / m
We use kinematics to find lips
v = v₀ + a t
v = v₀ + (F / m) t
The moment is defined by
p = m v
The moment change
Δp = m v - m v₀
Let's replace the speeds in this equation
Δp = m (v₀
+ F / m t) - m v₀
Δp = m v₀ + F t - m v₀
Δp = F t
We see that the change of momentum does not depend on the mass of the cars, as the force and time are the same all vehicles have the same change of momentum
Answer:
thermal and radiant
Explanation:
- thermal energy refers to the energy transmitted through heat
- radiant energy refers to the energy transmitted through electromagnetic radiation, such as light
When the person lights the match, the match produces both heat (thermal energy) and light (radiant energy), so the correct answer is
thermal and radiant
Answer:
Cd(NO3)2 + Na2S --> CdS + 2 NaNO3
Explanation:
Answer: the extremely high energy and temperature needed to start and keep the reaction.
Explanation:
Nuclear fusion is the combination of atomic nulei.
Those reactions are able to release huge amounts of energy.
Sun energy comes from fusion reactions, mainly the combination of two hydrogen atoms to form one helium atom. As said with the release of energy.
Nuclar fusion requires extremely high energies to start and keep a reaction. That energy can only be achived with temperatures greater than 40 million kelvins, which so far has been achived only with atomic bomb explosions.
Also, the materials to handle those temperatures, when you talk about confining the reaction, are not available, so far.
