True. If a medium such as H2O is in ice form, sound can not pass through it as well as if it were water or water vapor
Answer:
Sensorimotor
Explanation:
The sensorimotor stage is Piaget's first stage of cognitive development, during which a baby discovers the physical elements of the world around them and experiences object permanence.
The baby falls into the age range for the sensorimotor stage & the question describes processes directly involving interaction with objects
Answer: The answer is 716.8 km/hr
Explanation:
The main idea here is the convert the given units to km and hr. Here's the conversion factors.
1mi= 1.6km
1hr= 60min
We have to multiply 335miles by 1.60km/mi in order to get the answer in km then again we have to multiply 45 minutes by 1hr/60min in order to get the answer in hr.
The last step is to calculate the speed using the formula : v=d/t
=537.6km/0.75hr
=716.8km/hr
Answer:
The speed of planes is 419.31 miles per hours
Explanation:
Given that

S= 10 miles
And we have to find
.
From triangle ABC


by differentiating with respect to time t


Now when S=10 miles then

x= 9.53 miles
So



So the speed of planes is 419.31 miles per hours