Answer:The Doppler effect can be described as the effect produced by a moving source of waves in which there is an apparent upward shift in frequency for observers towards whom the source is approaching and an apparent downward shift in frequency for observers from whom the source is receding.
Explanation:
Answer:
d) – 44
Explanation:
given information:
length, l = 1.2 m
diameter, d = 0.2 m
flux, Φ = -5.0 Nm/C²
ε₀ = 8.85 x 10⁻¹²
to find the net charge of the cylinder, we use the following step
Φ = E/A
= Q/ε₀
Q = Φ ε₀
= (-5.0) (8.85 x 10⁻¹²)
= - 44.25 x 10⁻¹² C
= - 44 pC (d)
> How hard does the floor push on the crate?
We
have to find the net vertical (normal) Fn force which results from Fp and
Fg.
We know that the normal component of Fg is just
Fg, which is equal to as 1040N.
From the geometry, the normal component of Fp
can be calculated:
Fpn = Fp * cos(θp)
= 952.5 N * cos(53)
= 573.23 N
The total normal force Fn then is:
Fn = Fg + Fpn
= 1040 + 573.23
= 1613.2 N
> Find the friction force on the crate
<span>We
have to look for the net horizontal force Fh which results from Fp and Fg.
Since Fg is a normal force entirely, so
we can say that the horizontal component is zero: </span>
Fh = Fph + Fgh
= (Fp * sin(θp)) + 0
= 952.5 * sin(53)
= 760.7 N
>
What is the minimum coefficient of static friction needed to prevent the
crate from slipping on the floor?
We just need to compute the ratio Fh to Fn to get the
minimum μs.
μs = Fh / Fn
= 760.7
N / 1613.2 N
= 0.472
Answer Body mechanics is a term used to describe the ways we move as we go about our daily lives. It includes how we hold our bodies when we sit, stand, lift, carry, bend, and sleep. ... Good body mechanics means using the body's strength to the best mechanical advantage to do a task efficiently and without injury.
Explanation: