Answer:
For uniform acceleration
a = (v2 - v1) /t = 2.5 acceleration is constant 2.5
v2 = 2.5 * 4 v1 = 0 at t = 0
v2 = 2.5 m/s^2 * 4 s = 10 m/s
C the correct but not sure?
Answer:
T= 19.74 N
Explanation:
The tension in the string will be equal to centripetal force on the ball. (Newton's 3rd law, equal acting and reacting forces acts on a body)
T = Fc
Fc = m w ²r
here:
m = 0.25 kg, r = 0.5 m
w = 2 rps = 2 * 2π rad/s ( ∴ 1 revolution = 2π radians )
w = 4π rad/s
Fc = m w ²r = 0.25 * ( 4π )² * 0.5 N
Fc = T = 19.74 N
T= 19.74 N
Answer:
a material with a large specific heat can absorb a great deal of thermal energy without a great change in temperature.
Explanation:
The specific heat capacity of an object is the amount of energy needed to raise the temperature of 1 kg of mass of a substance by .
Mathematically, it is given by:
where
Q is the amount of energy supplied
m is the mass of the substance
is the change in temperature of the substance
The equation can be rewritten as:
Therefore, we see that the increase in temperature of a substance is inversely proportional to its specific heat capacity.
Therefore, a material with a large specific heat can absorb a great deal of thermal energy without a great change in temperature.
<span>The distance between wave crests is called wavelength. It is a characteristic shared by waves of all kinds, including ocean waves and sound waves. Wavelength is measured from the highest point, or summit, of one wave's crest to the summit of the next wave's <span>crest</span></span>
<span><span>hope this helps</span></span>