Answer:
511.545 Newtons
Explanation:
So 1 pound=4.44822 Newton’s so 115 times 4.44822 is 511.5453, then round it to get 511.545 Newtons.
Apply:
wavelength = speed of wave / frequency
wavelength = 12 m/s / 4 Hz = 48 m
Answer:
Greatest pressure on the ground is 1962 Pa
Explanation:
As we know that pressure is ratio of force and area
so we can write its equation as
now here we need to find the greatest pressure on the ground
here force is due weight of the object and area must be minimum in contact with the ground
F = mg
Now minimum area of contact with the ground is
now maximum pressure is given as
Answer:
<em>she'll be 42.3 years old</em>
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Explanation:
The year she left is 2020
she returns in 2040
the time observed to have passed by on earth is 40 years
she traveled at a speed of 2.5 x 10^8 m/s
From relativity, the astronaut will experience a time dilation and will age more slowly.
the time that is observed to pass on her ship will be gotten from
t' =
where t is the time that is observed to pass by an earthly observer
v is the speed of her ship
c is the speed of light = 3 x 10^8 m/s
v/c = 2.5/3 = 0.83
t' = = 40 x 0.5578 = <em>22.3 years</em> would have passed for her
This means that she'll be 20 + 22.3 = <em>42.3 years old</em>
Explanation :
Thermal energy transfer through conduction, conduction involves the direct transfer of heat from one object to another object that is contacted.
Thermal energy transfer through convection, convection involves the movement of warm particles.
Thermal energy transfer through radiation, radiation involves the movement of electromagnetic waves.