Acar has a mass of 1500 kg and a kinetic energy of 23,500 j. how fast is the car going?

v = 5.6 m/s

Explanation:

Given,

The mass of the car, m = 1500 kg

The kinetic energy of the car, K.E = 23,500 J

The kinetic energy of the of an object is given by the relation,

                                        K.E = ½ mv²

Substituting the given values in the equation,

                                        23,500 = ½ x 1500 x v²

                                              v² = 23500/ 750

                                                   = 31.33

                                                v  = 5.6 m/s

Hence, the K.E of the car is,   v  = 5.6 m/s

a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be? a long strand of spaghetti is folded once. if this is cut 20 times, how many pieces of spaghetti will there be?

\

you'd use the equation that establishes a relationship between  energy  and  wavelength, which looks like this

e=h⋅cλ, where

λ  - the wavelength of the photon; c  - the speed of light, usually given as  3⋅108m/s; h  -  planck's constant, equal to  6.626⋅10−34j s

plug the value you were given for the energy of the photon in the above equation to get the wavelength

e=h⋅cλ⇒λ=h⋅ce

λ=6.626⋅10−34js⋅3⋅108ms−1.257⋅10−24j=1.581⋅10−1m