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Ymorist [56]
3 years ago
9

A 6 cm diameter drill bit is used to drill a cylindrical hole through the middle of a sphere of radius 5 cm. What is the volume

of the resulting object?
Physics
1 answer:
ira [324]3 years ago
3 0

Answer:

2.4086 * 10^(-4)  m^3

Explanation:

Volume of sphere = 4/3 * pi * r1^3

Volume of cylinder = pi*r2^2*h

r1 = 0.05 m

r2 = 0.03 m

Hence,

Resulting Volume = Volume of sphere - Volume of cylinder

= \frac{4}{3}*pi*(0.05)^3 - pi*(0.03)^2*(0.1)\\= 5.236 * 10^(-4)  - 2.8274*10^(-4) \\= 2.4086 * 10^(-4) m^3

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Why is a compound as common as water considered a "weird" chemical substance?
vodka [1.7K]
There are many many fascinating things about water that make it different than any other chemical substance. For example, it is the only known compound whose solid state is less dense than it's liquid state. It also has hydrogen bonding which gives water many "weird" properties. Many chemistry teachers revolve their entire class around the properties of water.
5 0
3 years ago
a car tire is filled with air at pressure 325000 pa at 283 k. if the tire warms up to 302 k, what is the new pressure of the tir
WARRIOR [948]

Answer:

346819 Pa       or   ,347000 Pa in 3 significant figures

Explanation:

P1= 325000Pa , T1= 283K ,

P2=?  T1= 302 K

as here volume and mass both are constant so using ratio method for pressure temperature law we have P1/T1 = P2/T2

THIS WE CAN ALSO OBTAIN BY RATIO METHOD FOR GENERAL GAS LAW AS

P1V1/(m1T1 ) =  P2 V2/ (m2 T2)

IF V1 = V2 =V AND m1=m2=m then expression reduces to

P1/T1 = P2/T2

or P2 = (P1/T1)×T2

P2 = (325000/283) × 302

P2 = 1148.41×302

P2=346819

P2 = 347000 Pa in 3 significant figures

8 0
3 years ago
Question 5 of 20 A person throws a 0.12-kg ball straight up into the air. It reaches a height of 15 m. What is the force on the
leonid [27]

Answer:D

Explanation: .12 x 9.81

8 0
3 years ago
Cassy shoots a large marble (Marble A, mass: 0.06kg) at a smaller marble (Marble B, mass: 0.03kg) that is sitting still. Marble
4vir4ik [10]

The question can be solved using conservation of linear momentum.

M_{a} = 0.06kg and M_{b} = 0.03kg

Let the initial velocity of Marble A be , V_{a1} = 0.7m/s

Let the initial velocity of Marble B be, V_{b1} = 0m/s

Let the velocity of Marble A after collisiong , V_{a2}= -0,02m/s

Let the velocity of Marble B after collision be V_{b2}

From the conservation of linear momentum equation. We get,

M_{a}V_{a1}+M_{b}V_{b1}=M_{a}V_{a2}+M_{b}V_{b2}

Substituting the values we get,

(0.06)(0.7) + 0 = (0.06)(-0.02) + (0.03)V_{b2}

we get, V_{b2} = 1.44m/s

6 0
3 years ago
1. Explain how a boulder at rest on the ground can actually be moving at the same time.
Mars2501 [29]

Answer:

I don't know about the 1st one but An object at rest stays at rest and an object in motion stays in motion at a constant speed and direction unless acted upon by an unbalanced force. Or maybe its moving because the earth is moving and gravity is pulling it with.

2. Speed is the rate at which something or someone is able to move. Instantaneous Speed - the speed at any given instant in time. Average Speed - the average of all instantaneous speeds; found simply by a distance/time ratio.

3. Speed = distance divided by time or s=\frac{d}{t}. Some units for speed can be miles, kilometres, feet, or metres.

4. Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement. Put another way, speed is a scalar value, while velocity is a vector.

8 0
3 years ago
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