Question

1.. A 1- cm tall object is placed 25 cm in front of a covering lens .If the focal length is 10 c, , the image is   

a) real , upright and reduced

b) Irtual , inverted, and enlarged

c) Virtual , inverted .and reduced

d) real , inverted ,and reduced.

2.. A runner is approaching an ice cream truck that is double parked. The ice cream truck is playing music at a frequency of 80 Hz . As the runner passes the ice cream truck , what could a possible answer   for the observed frequency ?

a) 80 Hz

b) 100 Hz

c) 60 Hz

3.) Mary has a weight of 500 N on Earth . Determine her mass

a) 51 ks

b) 4,900 kg

c) 9,8 kg

d) 500 kg

4.) A 1 - cm tall object is placed 15 cm in front of the diverging lens . If the focal length is 12 cm , the image is .

a) virtual , upright, and reduced

b) real , upright, and reduced

c) virtual , upright, and enlarged

d) real , inverted, and reduced

5.) A step up transformer has 24V and 120 turns on the primary end , while the secondary end has 160 turn . Find the secondary voltage.

a) 12 V

b) 18 V

c) 32 V

d) 24 V

6) The speed of a wave on a string is 40 string on a40 m/s . If the frequency is 100 Hz, find the wavelength.

a) 40 m

b) 20 m

c) 40 cm

d) 4 km

7 ) A - cm tall object is placed 16 cm in front of a concave mirror . if the focal length is 12 cm , the image is

a) virtual , inverted and enlarged

b) real , inverted and reduced

c) real , inverted and enlarged

d) real , upright and enlarged

8.. Max has a habit of packing back and forth when he is in deep thought. He paced back and forth 10 times with a distance of 0.4 m for each direction . Determine the displacement and total distance.

a) 0 m and 4 m

b) o m and 8 m

c) 8 m and 0 m

d) 4 m and 0 m

Answer 1