Answer:
D. Nothing will happen; the seesaw will still be balanced.
Explanation:
D. Nothing will happen; the seesaw will still be balanced. Since both toruqes or momentums respect to the center have changed in the same amount (one-half their original distance) the seesaw will remain balanced, if the children change distance in a different amount then it will be out of balance
The correct answer to this question is : C) Conduction
EXPLANATION:
Before coming into any conclusion, first we have to understand conduction.
Conduction is the mode of transmission of heat in which heat will flow from a body at high temperature to a body at low temperature in contact or from hotter part of the body to its colder part, without any actual transport of particles.
As per the question, the heat is transferred to driver's hand when he touches the steering wheel.
As there is actual contact between hand and steering wheel, the heat transmission will be conduction.
Answer:
(a) 
(b) 
(c) 44133.5 m
Explanation:
<u>Given:</u>
= initial speed of the rocket in the first stage = 0 m/s
= final speed of the rocket in the first stage
= final speed of the rocket in the second stage
= time interval of the first stage
= time interval of the second stage
= distance traveled by the rocket in the first stage
= distance traveled by the rocket in the second stage
= distance traveled by the rocket in whole time interval
Part (a):
Since the rocket travels at constant acceleration.

Hence, the expression of the rocket's speed at time
.
Part (b):
In this part also, the rocket moves with a constant acceleration motion.

Hence, the expression of the rocket's speed in the time interval
is
.
Part (c):
For the constant acceleration of rocket, let us first calculate the distance traveled by the rocket in both the time intervals.

Similarly,

Hence, the rocket moves a total distance of 44133.5 m until the end of the second period of acceleration.
Answer:
Initial speed of the spaceship 1, v = 2 m/s
Explanation:
Given that :
Mass of spaceship 1 and 2 that have equal mass are 300 kg
Initial momentum of the spaceship 1 is 600 kg-m/s
To find :
We need to find the initial momentum of spaceship 1.
Solve :
The momentum of an object is equal to the product of mass and its velocity. Its SI unit is kg-m/s. Mathematically, it is given by :



v = 2 m/s
Therefore the initial speed of spaceship 1 is 2 m/s. Hence, this is the required solution.