Answer: 2.22s
Explanation: wave speed = 450 m/s, A = amplitude = 1.6mm, λ= wavelength = 0.19m
Wave speed = distance traveled / time taken
Distance traveled = 1km = 1000 m
450 = 1000/ t
t = 1000/ 450 = 2.22s
Answer:
0.031 m
Explanation:
Density of copper = ρ = 8960 kg/m³
r = Radius = 0.262 m
m = Mass of plate = 61.5 kg
v = Volume of plate = Volume of cylinder = πr²h
So, thickness of plate is 0.031 m
Answer:
F = k q1 q2 / r^2
r^2 = k q1 q2 / F = 9E9 * 4E-5 * 10.8E-5 / 4
r^2 = 9 * 4 * 10.8 / 4 * E-1 = 9.72 m^2
r = 3.12 m
Answer:
To protect you from fatal injuries and keep you secured in the case of an accident (my definition)
Explanation:
(Definition) Being buckled up during a crash helps keep you safe and secure inside your vehicle; being completely ejected from a vehicle is almost always deadly. If you don't wear your seat belt, you could be thrown into a rapidly opening frontal air bag. Such force could injure or even kill you.
Yes. Here is my explaination: Peer pressure is a complicated area. On one hand, it can help your child develop the coping skills necessary for adulthood. It can also, however, lead them in bad directions. While teens may feel they have “grown up,” their brains are not finished developing and one of the immature functions is judgment. Peer pressure might encourage teens to become more active in athletics or to avoid risky behaviors. Or it could lead them to try alcohol or drugs, skip school or engage in other negative behaviors.
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