The charge entering the positive terminal of an element is q = 5 sin 4 π t mc while the voltage across the element (plus to minus) is v = 3 cos 4 π t v (a) find the power delivered to the element at t = 0.3 s

123.30 W

Explanation:

We have given q = 5 sin 4πt

And voltage across the element V =  3 cos 4πt

We have to find the power delivered

So

We have to find the power at 0.3 sec

So

i had this question and the answer was 3.15 miles.

martina travels from school to her mom's office. from there, she walks to school. after school, she walks to the library and then to a friends house before finally ending back at home. find martina's total distance traveled.

a) 0 miles  

b) 0.4 miles  

c) 1 mile  

d) 3.15 miles

note: the given question is incomplete.

complete question is given below.

which is an example of kinetic energy?

a. the energy stored in ethanol  

b. a hockey puck sliding across the ice  

c. a compressed spring  

d. a ball sitting at the top of a ramp

solution: the kinetic energy is the energy posses by the virtue of the motion of the object.

in the given options, a, c and d are the example of potential energy because it is the energy posses by the virtue of the rest of the object. but option b has the kinetic energy as the object is in motion.

hence, a hockey puck sliding across the ice   is the apex example of kinetic energy.

so, the option (b) a hockey puck sliding across the ice   is the correct option.