Answer:
As you move toward the siren the pitch should get louder
Explanation:
Answer:The answer is A
Explanation:
To determine the force, we use the equation
Fg= G m1 m2/r2
, where Fg is the force of gravity, G is the gravitational constant,
m1
is the mass of the first body,
m2
is the mass of the second body, and r is the radius. Hence, we have
Fg=6.67×10−11 N×m2/kg2×2.5 kg×2.5 kg/(0.50 m)2=1.7×10−9N
. Since this is a gravitational problem, the force on one body has the same force as the other body, but the directions are opposite.
if for a force of 0.5 N we have a displacement of -0.02m we can calculate the elastic constant(k) with the formula F=-kx(F=0.5N x=-0.02)
k=F/x k=0.5/0.02=25N/m
now we can calculate the period by the formula
T=2π√(m/k)
in the mass we convert grams to kilograms so 100g=0.1kg
T=6.28√(0.1/25)⇒T=0.39seconds
Answer:
Few millimeter thick aluminium, water, wood, acrylic glass or plastic.
Explanation:
The materials that are best for protection against beta particles are few millimeter thickness of aluminium, but for the high energy beta-particles radiations the low atomic mass materials such as plastic, wood, water and acrylic glass can be used.
These materials can also be used in personal protective equipment which includes all the clothing that can be worn to prevent any injury or illness due to the exposure to radiation.
