To find the average acceleration of an object, subtract the initial velocity from the final velocity and divide it by the time taken. In this case, the average acceleration is -2.5 m/s².
The average acceleration of an object can be calculated by using the formula:
acceleration = (change in velocity) / (time taken)
In this case, the change in velocity is -15 m/s - (-10 m/s) = -5 m/s and the time taken is 2.0 s. So, acceleration = (-5 m/s) / (2.0 s) = -2.5 m/s² which means the correct answer is -2.5 m/s².
Therefore, the first option is correct.
The resistivity of a silver wire with a radius of 5.04 × 10–4 m is 1.59 × 10–8 ω · m. if the length of the wire is 3.00 m, what is the resistance of the wire?
The resistivity of a silver wire is 5.98 x 10^-2 ohms.
How do find the resistivity of a silver wire?Resistance is defined as: R = r*l/A where R = resistance in ohms r = resistivity (given as 1.59x10^-8) l = length of wire. A = Cross sectional area of wire.
Substituting into the formula, the known values, including the area of a circle being pi*r^2, gives:
R = 1.59x[tex]10^{-8}[/tex] * 3.00 / ([tex]\pi[/tex] * (5.04 x [tex]10^{-4}[/tex])²)
R = (4.77 x[tex]10^{-8}[/tex]) / (pi * 2.54016 x [tex]10^{-7}[/tex])
R = (4.77 x [tex]10^{-8}[/tex]) / (7.98015 x [tex]10^{-7}[/tex])
R = 5.98 x [tex]10^{-2}[/tex] ohms
The wire has a resistance of 5.98 x 10^-2 ohms.
Learn more about Resistance here: https://brainly.com/question/14883923
#SPJ2
What is the magnitude of the electric field due to the dipole at location a, a distance d?
What is a 3 letter (all lowercase) word that sits in the middle of the Milky Way? {Planets rotate and revolutionize around it...}