What is the kinetic energy of a 200.0-Kg boat moving at 5.0 m/s?

Explanation:

K

E

=

1

2

m

v

2

kinetic energy  

=

1

2

* mass * velocity^2

where mass is in kilograms  

k

g

and velocity is in metres per second  

m

/

s

.

here,  

m

=

2000

v

=

5

v

2

=

25

1

2

m

v

2

=

1

2

⋅

2000

⋅

25

=

50000

2

=

25000

K

E

=

25000

J

or

25

k

J

Explanation:

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2