Laura thinks that the oak tree has the largest leaves of all the trees at the playground. how could she best test her prediction?
a.
measure the height of each of the trees at the playground.

b.
measure the length of a few leaves from each tree at the playground.

c.
measure the length of one oak leaf and one leaf from another tree.

d.
walk around the playground and look at the leaves on each tree.

so easy. just google the electromagnetic waves and it’ll pop up.

force is based upon mass and acceleration.the statement is not always true.

it can be explained from newton's second law of motion.

as per newton's second law of motion the rate of change of momentum is directly proportional to the applied force and takes place along the direction of force.

mathematically it can be written as -

                                              ⇒      

here   k is the proportionality constant whose value is 1.

                                                            [a is the acceleration=dv/dt]

hence we see that force not only depends on mass and acceleration but also on velocity and rate of change of mass. force f will depend on mass and acceleration only when mass is constant.

hence the statement that force is based upon mass and acceleration is false.

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.

friction

explanation:

they us to move forward and backwards