Answer:
Increase the radius of curvature of surface.
Explanation:
Radius of curvature is the measurement that is two times the focal length, for a given lens. It lies on either side of the lens.
Focal length is the distance which is half of the radius of curvature. Radius of curvature is a measure of the radius of the circle . Focal length is the distance between the center of curvature of the lens and the point where all the rays are brought to a focus for a distant object.
Answer:
Thus, the initial velocity of the bullet is 507.5 m/s.
Explanation:
mass of bullet, m = 0.0085 kg
mass of block, M = 0.99 kg
Height raised, h = 0.95 m
Let the initial velocity of bullet is u and the final velocity of block and bullet system is v.
Use conservation of energy
Potential energy of bullet bock system = kinetic energy of bullet block system
Now use conservation of linear momentum
mu = (M+m) v
0.0085 x u = (0.99 + 0.0085) x 4.32
0.0085 u = 4.314
u = 507.5 m/s
Thus, the initial velocity of the bullet is 507.5 m/s.
Answer:
a.) high amplitude, high frequency
Explanation:
Frequency and amplitude are properties of sound. Varying these properties changes how people perceive sound.
While hearing sound of a particular frequency we call it pitch i.e., the perception of a frequency of sound.
High pitch means high frequency and high frequency is perceived to have a shrill sound.
The loudness of a sound is measured by the intensity of sound i.e., the energy the sound possesses per unit area. As the amplitude increases the intensity increases. So, a loud sound will have higher density.
Hence, the loud shrill whistle will have high frequency and high amplitude.
Answer:
Increasing temperatures evaporate water faster, causing an increase in salinity.
Explanation:
When the water molecules of the ocean become heated, they expand. ... Since warmer water thus can hold more salt and other molecules than cold water; it can have a higher salinity.
Answer:
value-added tax (VAT) is a consumption tax that is levied on a product repeatedly at every point of sale at which value has been added. ... VAT is commonly expressed as a percentage of the total cost. For example, if a product costs $100 and there is a 15% VAT, the consumer pays $115 to the merchant.
Explanation:
archemdes principle states that the boyant upward force by liquid is equal to liquid displaced by solid...
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