I WILL GIVE BRAINLIEST

At an amusement park there is a ride in which cylindrically shaped chambers spin around a central axis. People sit in seats faci

ozzi

Answer:

$r=2.4m$

Explanation:

We have to use the centripetal force equation

$Fc=\frac{mv^{2} }{r}$

we need the radious so we have to isolate "r" and we get

$r=\frac{mv^{2} }{Fc}$

replacing m=65 kg, v= 4.1 m/s and Fc=455N we get

$r=\frac{65*4.1^{2} }{455}$

$r=2.4m$

The radius of the amusement park chamber is 2.4m

4 0

3 years ago

If an electron is accelerated from rest through a potential difference of 1200V find its approximate velocity at the end of this

kolbaska11 [484]

Answer: 2.1 × 10^7 m/s

Explanation:

Please see the attachments below

8 0

4 years ago

Một trụrỗng có khối lượng 50 kg, đường kính 1m, đang quay vớivận tốc800 vòng một phút. Tác dụng vào trụmột lực hãm tiếp tuyến vớ

satela [25.4K]

Answer:

i now peklat mo sa pewet

Explanation:

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6 0

3 years ago

Energy is measured in ___________. a. kilograms b. joules c. electron volts d. B or C Atoms and molecules are the fundamental bu

Nookie1986 [14]

Answer:

Energy is measured in JOULES.

Atoms and molecules are the fundamental building blocks of matter.

Explanation:

Matter is anything that has weight and occupies space. Locked within any given molecule or atom is some form of energy waiting to be activated. Energy can neither be created nor destroyed.

6 0

3 years ago

A star with the same mass and diameter as the sun rotates about a central axis with a period of about 24.0 days. Suppose that th

Mila [183]

Answer:

a) w = 2.52 10⁷ rad / s, b) K / K₀ = 1.19 10⁴

Explanation:

a) We can solve this exercise using the conservation of angular momentum.

Initial instant. Before collapse

L₀ = I₀ w₀

Final moment. After the collapse

L_f = I w

angular momentum is conserved

L₀ = L_f

I₀ w₀ = I w (1)

The moment of inertia of a sphere is

I = 2/5 m r²

we take from the table the mass and diameter of the star

m = 1,991 10³⁰ kg

r₀ = 6.96 10⁸ m

r = 6.37 10⁶ m

to find the angular velocity let's use

w = L / T

where the length of a circle is

L = 2π r

T = 24 days (24 h / 1 day) (3600 s / 1h) = 2.0710⁶ s

we substitute

w = 2π r / T

wo = 2π 6.96 10⁸ / 2.07 10⁶

wo = 2.1126 10³ rad / s

we substitute in equation 1

w = $\frac{I_o}{I}$

w = 2/5 mr₀² / 2/5 m r² w₀

w = ( $\frac{r_o}{r}$ ) ² wo

w = (6.96 10⁸ / 6.37 10⁶) ² 2.1126 10³

w = 2.52 10⁷ rad / s

b) the kinetic energy ratio

K = ½ m w²

K₀ = ½ m w₀²

K = ½ m w²

K / K₀ = (w / wo) ²

K / K₀ = 2.52 10⁷ / 2.1126 10³

K / K₀ = 1.19 10⁴

7 0

3 years ago