What is the best explanation for why a particle is striking
point x?
this image shows a stream of positively charged particles
being directed at gold foil. the positively charged particles
are called "alpha particles and each one is like a nucleus
without any electrons.
alpha particles are mostly empty space, so they move in
random directions, and one of these alpha particles can
strike point x.
the gold atoms contain negative electrons, so when
alpha particles strike the gold they keep moving but in
various directions
if an alpha particle hits the gold foil, a gold nucleus splits
and a particle from it flies out at point x.
when the dense, positive alpha particle passes close to
a positive nucleus of gold, the alpha particle repels and
hits the screen at point x

hurry i need

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min

the best answer for these questions would be:

1.            c. is smaller

2.            d) concrete operational

3.            b) interaction with the environment – the children interact with their environment can them learn more.

4.            a) parents who reason openly with children can limit a child’s cognitive ability.