Answer:
a
b
The value is 
Explanation:
From the question we are told that
The mass of the person is 
The horizontal velocity is 
The mass of the shed is 
The distance covered is 
Generally from the law of momentum conservation we have that
Here 
is the initial velocity of the shed which is 0 m/s
=>
Generally the workdone by friction is mathematically represented as
Here 
is the final velocity of the person and the shed when they come to rest and the value is 
Generally this workdone by friction is also mathematically represented as
=> 
=> 
=> 
=>
Answer:
1 ) Warm air
2) Cold air
3) Cold water
4) Steel
5) Hot molten
Explanation:
In order to solve this problem, we have to warn that the sound propagates more easily in denser media, in this way we have to identify the densities of the different materials.
Density cold air = 1.2 [kg/m^3]
Density warm air = 1.01 [kg/m^3]
Density cold water = 1000 [kg/m^3]
Density steel = 7500 [kg/m^3]
Density hot molten = 14100 [kg/m^3]
Therefore in order from the slowest to the fastest:
1 ) Warm air
2) Cold air
3) Cold water
4) Steel
5) Hot molten
Answer:
speed was the sport utility vehicle traveling is 14.08 m/s
Explanation:
Given data
car mass m1 = 1100 kg
speed s = 32 m/s
vehicle mass m2 = 2500 kg
to find out
speed was the sport utility vehicle traveling
solution
we will apply here conservation of momentum law
the momentum change of car is equal and opposite of the momentum change of vehicle
so equation are
m1 v1 - m2 v2 = 0
so here v2 will be
v2 = (m1 / m2 ) v1
put here all these value we get
v2 = (1100 / 2500 ) 32
v2 = 14.08 m/s
so speed was the sport utility vehicle traveling is 14.08 m/s
Answer:
a periscope use total internal reflection to allow us to see things
the reflection happens at 45°
Explanation:
Answer/explanation :
It's the amount of heat that must be added OR removed from a unit mass of a substance to change its temperature by one degree Celsius.
