What is the answer to 17 ‐ 12× ‐ 18 ‐ 5×

Sledding down a hill, you are traveling at 10 m/s when you reach the bottom. You (inertia 80 kg ) then move across horizontal sn

RSB [31]

Answer:

V = 0.32 m /s

Explanation:

Momentum of the man on the sledge along with sledge

= (80+8) x 10 = 880 kg. m/s When the man jumps off the sledge , the velocity of the sledge will remain intact at 10 m/s

When the sledge hits the boulder and bounces back the momentum of the sledge - boulder system will remain conserved .

change in momentum of sledge = 8 x (10 +6 )

= 128 kg m/s

Change in the momentum of boulder

= 400 V -0

= 400V

400V = 128

V = 0.32 m /s

5 0

3 years ago

A bar magnet has five lines of force cutting one square centimeter (1 cm2). Assuming that each line of force represents 30 Wb of

user100 [1]

Answer:

The magnetic flux density is 3 x 10⁵ Wb/m²

Explanation:

Given;

magnetic flux of each line of force, Ф = 30 Wb

area of the bar magnet, A = 1 cm² = 1 x 10⁻⁴ m²

The flux density of the magnet is the measure of the concentration of the magnetic flux per unit area. The unit is Wb/m² or Tesla.

B = Ф / A

B = 30 / (1 x 10⁻⁴ )

B = 3 x 10⁵ Wb/m²

Therefore, the magnetic flux density is 3 x 10⁵ Wb/m²

4 0

2 years ago

A ship travels north at 15 km/h for 5 h. What is the ship's displacement in km?

aliya0001 [1]

So you would do 15*5 to get 75

3 0

3 years ago

Read 2 more answers

Elevated water tanks are used in a municipal water distribution system to provide adequate pressure. Compute the height (h) of t

Lemur [1.5K]

Answer:

a) h = 53.8 m, b) h_minimum = 28 m, h_maximum = 63.3 m

Explanation:

a) For this exercise let's use Bernoulli's equation.

The subscript 1 is for the tank and the subscript for the building

P₁ + ½ ρ g v₁² + ρ g y₁ = P₂ + ½ ρ g v₂² + ρ g y₂

In general, the water tanks are open to the atmosphere, so P1 = Patm, also the tanks are very large so the speed of the water surface is very small v₁=0 and as they give us the precious static, this it is when the keys are closed so the output velocity is zero, v₂= 0. The height of the floors in a building is y₂ = 12 m

we substitute in Bernoulli's equation

P_{atm} + 0 + ρ g h = P₂ + 0 + ρ g y₂

h = $\frac{(P_2 - P_{atm}) + \rho \ g \ y_2}{\rho \ g}$

h = $\frac{\Delta P}{\rho g}$ + y₂

indicate that the value of ΔP = 410 10³ Pa

we calculate

h = 410 10³ / (1000 9.8) + 12

h = 53.8 m

b) ask for the height range for the minimum and maximum pressure

h = $\frac{\Delta P}{\rho g}$ ΔP / rho g

minimum

h_minimum = 275 103/1000 9.8

h_minimum = 28 m

maximums

h_maximo = 620 103/1000 9.8

h_maximum = 63.3 m

8 0

3 years ago

The momentum of objects depends upon how much volume they occupy

sattari [20]

<u>Answer:</u>

"The momentum of objects depends upon how much volume they occupy" is FALSE.

<u>Explanation:</u>

The quantity of movement by a body is estimated as a function of its mass and velocity.The quantity of momentum an object can have it depends on two variables i.e how much mass moves and how quickly the mass moves. In simple it is dependent on mass and velocity.

There is a difference between mass and volume, as mass is the quantity of matter an object contains while volume is space occupied by mass. For an instance, the bowling ball have more momentum than a basketball, because bowling ball have much more mass and velocity than basketball, although both type of ball have approximately same volume.

3 0

3 years ago