Answer:
Explanation:
Mass of station wagon M = 1200 kg , velocity V = 12 m/s
Mass of car m = 1800 kg , velocity v = 20 m/s
a ) Let centre of mass of car and station wagon be at a distance d from wagon
Taking moment of weight about it
1200 x d = 1800 x ( 40 - d )
3000 x d = 1800 x 40
d = 24 m
b ) Total momentum = MV +mv
= 1200 x 12 + 1800 x 20
= 50400 kg ms⁻¹
c ) Speed of centre of mass
v₀ = (MV + mv )/(m+M)
= 50400/3000
= 16.8 m/s
d) System Total momentum = velocity of cm x total mass
= 16.8 x 3000 = 50400 m/s .
It is equal to what was calculated in part b)
Answer:
a. active volcanoes river valleys feeding into surface lakes of liquid water surfaces with very few impact.
Explanation:
Magnetic field B is produced when a current I Amphere passes through a solenoid. B is parallel to its axis.
B=U N/I I. N is number of turns in the solenoid of lm length
N=200, l= 20cm= 0.2m, I = 1₀sin (2πft) where f is equal to 60Hz
B= 4π × 10⁻⁷(200/0.2) l₀ sin (2πft) T
=1.256 × 10⁻³ l₀ sin(2πft) Tesla
Area of the coil is πr² = π (1.5cm)² = 2.25π ×10⁴m²
magnetic flux which is through the coil is given by
Ф = B.A = BA cosФ
ФФ = O since B is in direction of A
A= 40 ×π×2.25 ×⁻⁴m² which is the number of turns being 40.
Flux Ф through the coil is,
1.256 ×10⁻³ l₀ sin (2πft) ×9π ××10⁻³m²
=35.5 ×10⁻⁶ l₀ sin ₀(2πft)ab
Ф is time-varying emf will be generated in the coil
∈= dФ/dt
∈ = d/dt [35.5 × 10⁻d l₀ sin (2πft) ab]
∈ = 35.5 ×10⁻⁶ l₀ 2πf cos 2πftV
f = 60Hz
∈∈ 13376.4 ×10⁻⁶ l₀ cos 2πftV
Current I amp shall be induced in the cell of resistance Rohm so
I= E/R
I = 13376.4 ×10⁻⁶ l₀ cos 2πft)V/0.4∩
=33441 ×10⁻⁶ I₀ cos 2πft A
I = 3344q × 10 ⁻⁶ l₀
But I = 0.2A
l₀ = (0.2)(10⁶)/33441 = 6.0A
Answer:
The second option: 11 kg * m/s
Explanation:
Recall that linear momentum is defined as the product of the mass times its velocity, therefore in this case, the mass is 0.45 kg , and the speed is 25 m/s, therefore the linear momentum is:
P = m * v = 0.45 Kg * 25 m/s = 11.25 kg * m/s
So roundng the answer to the nearest whole number, you get 11 kg * m/s, which is the second option they give you.
Answer:
A.)
Explanation:
Because you didn't add anything or take anything away.