What is the correct definition of refraction?

Pavlova-9 [17]

Explanation:

momentum = mass x velocity

initial momentum = 100 x 15 = 1500kgm/s

after momentum = 100 x 20 = 2000kgm/s

a =(v-u)/t

a = (20-15)/10

a = 5/10

a = 0.5m/s²

f = ma

f = 100 x 0.5

f = 50N

7 0

3 years ago

Crazy boy [7]

Answer:

line 3.

Explanation:

5 0

2 years ago

lesya692 [45]

The child is thrown for 7 seconds

7 0

2 years ago

lara [203]

The magnitude of the source is 2.2 C

6 0

3 years ago

arlik [135]

Answer:

0.9N/C

Explanation:

-The force of a charged particle in an electric field is given by the equation;

$F=qE\\\\q-charge\\$

#we substitute the values of the charge and field strength:

$F=qE\\\\=4.5\times10^{-5}\times2.0\times10^4\\\\=0.9 \ N/C$

Hence, the electric force acting on the charge is 0.9N/C

7 0

2 years ago