Answer:
carbon dioxide (what you are blowing up the balloon with) is a heavy gas. so when you fill the Balloon with it, the balloon will not float. helium is a light gas and floats. gravity takes another. part in this
Answer:
The value is
Explanation:
From the question we are told that
The mass of the first car is 
the initial speed of the car is 
The mass of the second car is 
The distance move by both cars is s = 1.93 m
Generally from the law of momentum conservation

Here
because the second car is at rest
and
is the final velocity of the the two car
So
=> 
Generally from kinematic equation

here a is the deceleration
So

=> 
Generally the frictional force is equal to the force propelling the car , this can be mathematically represented as

Here F is mathematically represented as

and
So
=>
=>
Answer:
1.37 seconds before.... splat !
Explanation:
y = y0 + v0 t + 1/2 a t^2 y0 = 30 y = 0
v0 = 0 ( from rest)
a = - 32.2 ft/s^2
0 = 30 - 1/2 * 32.2 * t^2
t=1.366 seconds <u> Note that mass is irrelevant.</u>
Answer:
The answer is the shirt would disappear because I would eat him
The amount of energy needed to increase the temperature of a substance by

is given by:

where
m is the mass of the substance
Cs is the specific heat capacity of the substance

is the increase in temperature
In our problem, m=50.0 g,

(specific heat capacity of water) and

, therefore the amount of energy needed is