Answer:
the answer is A
Hope tis helps:)
Explanation:
B.Ultraviolet catastrophe
C. Emission spectra
D. Photoelectric effect
Answer:
The answer is 96ft^3
Explanation:
T=initial concrete mixture
S1=initial amount of sand
S2=final amount of sand
T2=final amount concrete mixture
C=amount of cement
Data:
T=480Ft^3
the quantities of the initial mixture are
S=0.7*480=336Ft^3
C=0.3*480=144 Ft^3
we pose the following equations
144+S2=T2
T2*0.75=S2
if we solve
S2=144/(1/0.75-1)=432ft^3
to know how much we should add we subtract it from the initial amount of sand
Answer=432ft^3-336ft^3=96ft^3
b. force
c. power
d. acceleration
Answer:
C. power
Explanation:
B. 2.2 m/s^2
C. 4.5 m/s2
D. 3.3 m/s^2
The acceleration of the sled is 2.2 m/s^2.
To determine the acceleration of the sled, we can use Newton's second law of motion which states that the net force acting on an object is equal to the mass of the object multiplied by its acceleration: F = m * a. Rearranging the formula, we have a = F / m. Plugging in the given values, we get a = 540 N / 250 kg = 2.16 m/s2. Therefore, the correct answer is B. 2.2 m/s2.
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