Answer:
43.1 g
Explanation:
Density, d is defined as the mass per unit volume of an object. Density is therefore expressed as
d=m/v
Here, m is mass and v is the volume
Making mass the subject of the formula
Mass, m=dv
The volume, v is given by
V=lwh
Substituting lwh for v in the equation for mass then mass, m=dlwh
Substituting 2.6 g/cm3 for d, 4.0 cm for l, 1.8 m for w and 2.3 for h then the mass of the block will be
M=2.6*4*1.8*2.3=43.056 g
Expressing it in 1 decimal place, mass is approximately 43.1 g
Answer:
Additionally, the initial horizontal velocity may be calculated by measuring the diameter d of the ball and dividing the result by the amount of time t required for the ball to pass across the photogate. Vo = d/t is the formula.
Initial vertical velocity is the vertical component of the initial velocity: v 0 y = sin 0 sin 0 = (30.0 m/s) sin 45° = 21.2 m/s
Explanation:
Hope it helps:)
Rainbows on an oily street after it's been raining. The colors in floating bubbles. Rainbows in the sink when using dish-soap.
Sound level at distance of 15 m is given as 20 dB
so intensity at this distance is given as
now if we move closer to some some distance the sound level is now 50 dB
now the intensity is given as
now we know that
so now the distance from friend must be 47 cm
