Given,
Displacement of the car = 150 km
Velocity of the car = 15.0 km/h
We need to calculate the travel time t
We all know that the formula to calculate velocity is
Velocity = displacement / time
From the above equation,
Time = Displacement / Velocity
Substituting the values in the above equation,
Time = 150 / 15.0 = 10 hours
Therefore, travel time = 10 hours.
Given :
Whole-body dose of 8.4 mGy from gamma-rays and 1.2 mGy from 80-Kev neutrons.
To Find :
The effective dose to a worker.
Solution :
By the given information effective dose to a worker is given by :
E.D = ( 8.4 × 1.2 × 0.12 ) + ( 1.2 × 1 × 1 )
E.D = 1.2096 + 1.2
E.D = 2.4096
Therefore, the effective dose to a worker is 2.4096 .
Answer:
Explanation:
Density is defined as mass per unit volume.
Specific Gravity is the ratio of the density of a substance to the density of water, or it is the ratio of the weight of a body to the weight of an equal volume of water
Therefore we can compute the S to be
S = W / W-W1
W = weight of the solid in air = 0.8000N
W1 = weight of solid in water = 0.7295N
S = 0.8 / 0.8- 0.7295 =
0.8/ 0.0705 = 11.35
Density of the object = specific gravity × density of water
= 11.35 × 1 g/cm3 = 11.35 g/cm3
Answer:
slightly different frequencies
Explanation:
The alternate increase or decrease of sound produced by the interference of two sound waves of slightly different frequencies is called ‘Beat’. The maximum beat frequency that a human ear can detect is 7 beats/sec.
This definition of the beats is clearly pointing out that the two waves whose frequencies are slightly different will add together to produce the beats.
Therefore, the correct answer will be:
<u>slightly different frequencies</u>
Answer:
1) 20 m/s
2) 60 meters
Explanation:
with a constant acceleration of 4m/s/s, the vehicle will end up traveling at 20 m/s after 5 seconds, and will have travelled 60 meters.