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A jet flies 700 km due north, then 300 km west, after which it moves 400 km due north and 800 km due east before it arrived at it's destination and landed.
(a) using vector notation, draw this movement.
(b) find the resultant displacement of the jet
6. How much energy (in Joules) will be produced on complete fission of 1 kg of Uranium (235U), considering that only 0.1% of mass is converted into energy.
At an amusement park,the pirate ship swingsback and forth every 20 seconds.
Period:
Frequency:
A. Narrow bridge oscillated up and down 5 times per second.
Period:
Frequency:
B. A tuning fork has a frequency of 252 Hz.
Period:
Frequency:
1. A very tall skycraper sways back and forth every 4.0 seconds.
Period:
Frequency:
2. A pendulum takes 0.5 second to complete one cycle.
Period:
Frequency:
1. A speaker vibrates at 200 cycles per second.
Period:
Frequency:
2. A smoke alarm battery is beeping 2 times per minute.
Period:
Frequency:
The focal point of a hyperopic eye is [Best
answer]
(A) on the retina.
(B) behind the retina.
(C) on the fovea.
(D) in front of the retina.
Converging lens can [ Best answer ]
(A) produce a magnified upright real image of an
object.
(B) be used to correct the myopia.
(C) be used to correct the astigmatism vision
defect.
(D) be used to correct the hyperopia.
A mass of 2.3 kg is initially moving at 5 m/s. A constant force of 15N is applied to the mass for 6 seconds. Find (a) the initial momentum, (b) final momentum.
A cheering squad is made up of three members: Lynne of 50kg moving at 3 m/sNorth. Angie of mass 58kg moving eastward at 3 m/s and Mercy of mass 6 kg moving at 3 m/s south. What is the combined momentum of the squad?
#339914 on Dec 2023