Pressure has inverse relationship with area of an object. The smaller the area is, more pressure it exerts. Increasing the sharpness of knife(decreasing its area), increases the pressure on an object i.e ability to cut increases on increasing the sharpness.
Hope this helps.
S = d/t
s = 1396/4 = 349m/s
Answer:
3 N to the right
Explanation:
There are two forces acting on the car:
- A force of 10 N towards the right
- A force of 7 N towards the left
Therefore, the net force is given by the difference between the two, since they are in opposite directions:
And the direction is to the right, since the force to the right has greater magnitude than the force to the left.
Answer:
speed of the mass is 3.546106 m / s
Explanation:
given data
mass = 77.3 g = 77.3 × kg
spring constant k = 12.5 N/m
amplitude A = 38.9 cm = 38.9 × m
to find out
the speed of the mass
solution
we will apply here conservation energy that is
K.E + P.E = Total energy ..................1
so that Total energy = K.E max = P.E max
we know amplitude so we find out first P.E max that is
PE max = K.E + P.E
(1/2)kA² = (1/2)mv² + (1/2)kx²
kA^² = mv²+ kx²
so here v² will be
v² = k(A² - x²) / m
v = √[(k/m)×(A² - x²)] ............2
here x = (1/2)A so from from 2 equation
v = √[(k/m)×(A² - (A/2)²)]
v = √[(k/m)×(3/4×A²)]
now put all value
v = √[(12.5/ 77.3 × )×(3/4×(38.9 ×)²)]
v = 3.546106 m / s
speed of the mass is 3.546106 m / s
At temperatures above 0 K, the electron concentration in the conduction band is non-zero because some electrons from the valence band will overcome the bandgap by gained thermal energy. The correct option is D.
<h3>What are electrons?</h3>
The electrons are the spinning objects around the nucleus of the atom of the element in an orbit.
Consider an ideal intrinsic semiconductor in thermal equilibrium. No external forces or fields are applied to this semiconductor. At temperatures above 0 K, the electron concentration in the conduction band is non-zero because some electrons from the valence band will overcome the bandgap by gained thermal energy.
The semiconductors are free from impurities. At room temperature. Some electrons ion valence band gains energy and cross the bandgap. They get transferred to the conduction band.
Thus, the correct option is D.
Learn more about electrons.
brainly.com/question/1255220
#SPJ1