the friction is becouse of the microscopic bumps between 2 surfaces and matters,it's a contact force.so with pushing them tge contacts between the bumps increases so the force will increase to
Answer:
5.58 × 10⁻¹¹ N/C
Explanation:
Electric force on a charge, F = qE
where,
F is the electric force in Newton (N)
q is the unit charge in Coulomb (C)
E is the electric field intensity in N/C
Also, the weight of an object, W = mg
Where,
w is weight of an object in N
m is mass in kg
g is acceleration due to gravity in m/s²
Now from the question given, the electric force exerted on the proton is equal in magnitude to the proton's weight.
⇒ F = w
qE = mg
making electric field, E the subject of the equation,
E = (9.11 × 10⁻³¹ kg × 9.8 m/s) ÷ 1.6 × 10⁻¹⁹ C
E = 55.8 × 10⁻¹² N/C
E = 5.58 × 10⁻¹¹ N/C
The sea is getting fuller.Global warming is causing a rise in a sea level.This is partly due to melting ice in Greenland and Antarctica,and partly due to thermal expansion of the water.The rise so far is about nine inches and the rate has increased to about one inch every seven years.
Answer:
11.306 nm/s
or
113.06 atomic layers/sec
Explanation:
Hello!
First we need to know how much an inch equals in nanometers and a day in seconds:
Since <em>1inch = 2.54cm</em> and <em>1cm=10^7nm</em>
<em> </em>1 inch = 2.54 * 10^7 nm<em> </em>
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Also <em>1day = 24hours = 24*60minutes = 24*60*60seconds</em>
<em> </em>1 day = 86.4 * 10^3 s
Therefore the rate at which the hair grows in nanometers per seconds is:
1/26 in/day = (1/26) * (2.54*10^7)/(86.4*10^3) = 11.306 nm/s
Now, if 1 atomic layer = 0.1 nm this means that 1 nm = 10 atomic layers.
Therefore:
The rate in atomic layers is
11.306 nm/s = 11.306 (10 atomic layers)/s = 113.06 atomic layers/sec
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