Answer:
11.47answer
Explanation:
Height of the tower, s = 500 m
Velocity of sound, v = 340 m sˆ’1
Acceleration due to gravity, g = 10 m sˆ’2
Initial velocity of the stone, u = 0 (since the stone is initially at rest)
Time taken by the stone to fall to the base of the tower, t1
According to the second equation of motion:
S = ut1 + 1/2gt12
500 = 0 x t1 + 1/2 x 10 x t12
t12 = 100
t1 = 10s
Now, time taken by the sound to reach the top from the base of the tower, t2= 500/340 = 1.47 s
Therefore, the splash is heard at the top after time, t
Where, t= t1 + t2 = 10 + 1.47 = 11.47 s.
Answer:
A. Tuberculosis
Explanation:
BCG vaccine (Bacillus of Calmette and Guérin) was created in 1921 by Léon Calmette and Alphonse Guérin. Protects against severe forms of tuberculosis, a contagious disease caused by the bacterium Mycobacterium tuberculosis, which mainly affects the lungs and, if untreated, can cause serious breathing problems, weight loss, weakness and even death. The vaccine is the only type of immunization against the disease and should be given as a single dose.
Pentavalent vaccine protects against 5 diseases: diphtheria, tetanus, pertussis, poliovirus and infections caused by Haemophilus influenzae type b (meningitis, pericarditis, pneumonia, arthritis and osteomyelitis).
- Diphtheria causes inflammation and injury to parts of the airway and may lead to the death.
- Pertussis may progress to severe conditions with pulmonary, neurological, hemorrhagic complications and dehydration
- And polio in some cases causes paralysis, especially in the legs.
A 40 minute moderate jump rope workout would burn around 700 calories
The answer would be A because a virus is surrounded in a protein coat
The frequency of low birth weight in the us is 2500 grams
