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juin [17]
3 years ago
11

When throwing curveballs in baseball, is it important to have air hit the ______ part of the ball.

Physics
2 answers:
Licemer1 [7]3 years ago
7 0

Answer: A (smooth)

Thanks for using Brainly! You or your parents Vote Biden 2020.

Hope we influence your vote!

Ede4ka [16]3 years ago
5 0

Answer:

Rough

Explanation:

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A 60 watt light bulb runs for 5 seconds. How much energy does<br> it use?
kap26 [50]
He’s and heists sijsnsns shamans
7 0
3 years ago
The membrane of the axon of a nerve cell is a thin cylindrical shell of radius r = 10-5 m, length L = 0.32 m, and thickness d =
maksim [4K]

Answer:

5.3 x 10⁻⁹ C

Explanation:

r = radius of cylindrical shell = 10⁻⁵ m

L = length = 0.32 m

A = area

Area is given as

A = 2πrL

A = 2 (3.14) (10⁻⁵) (0.32)

A = 20.096 x 10⁻⁶ m²

d = separation = 10⁻⁸ m

k_{appa} = dielectric constant = 4

Capacitance is given as

Q=\frac{k_{appa}\epsilon _{o}A}{d}                               eq-1

V = Potential difference across the membrane = 74 mV = 0.074 Volts

Q = magnitude of charge on each side

Magnitude of charge on each side is given as

Q = CV

using eq-1

Q=\frac{k_{appa} \epsilon _{o}AV}{d}

Inserting the values

Q=\frac{4 (8.85\times 10^{-12})(20.096\times 10^{-6})(0.074)}{10^{-8}}

Q = 5.3 x 10⁻⁹ C

4 0
3 years ago
A ball of mass 0.15 kg is dropped from rest from a height of 1.25 m. It rebounds from the floor to reach a height of 0.960 m. b)
Art [367]

Answer:

Explanation:

If v be the velocity just after the rebound

Kinetic energy will be converted into potential energy

1/2 m v² = mgh

v² = 2gh

v = √ 2gh

= √ 2 x 9.8 x .96

= 4.33 m / s

4 0
3 years ago
I need help with physics. Question 3 and 4. Thanks.
shusha [124]
It’s c and a I believe ask someone else to make sure but I’m pretty sure
6 0
3 years ago
Suppose that she pushes on the sphere tangent to its surface with a steady force of F = 75 N and that the pressured water provid
PolarNik [594]

Answer:

The time taken to rotate the sphere one time is,  t = 22 s

Explanation:

Given data,

The mass of the sphere, m = 8200 kg

The radius of the sphere, r = 90 cm

                                             = .9 m

The force applied by the girl, F = 75 N

The moment of inertia of the sphere is,

                            I = 2/5 mr²

                              = (2/5) 8200 x (.9)²

                              = 2657 kg·m²

The torque,

                            τ = I α

                             75 x 0.9 = 2657 x α

                              α = 0.0254 rad/s²

The angular displacement,

                            θ = ½αt²

                             2π =  ½ x 0.0254 rad/s² x t²

                                t = 22 s

Hence, the time taken to rotate the sphere one time is,  t = 22 s

8 0
3 years ago
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