Download the App!
Get 24/7 study help with the Numerade app for iOS and Android! Enter your email for an invite.
No Related Subtopics
August 26, 2021
An oil tanker has a mass of 400,000 tonnes. It is 500 m long and 40m wide
An oil tanker has a mass of 400,000 tonnes. It is 500m long and 40m wide. What is the minimum depth of harbor it requires? Calculate the downward force. State the upward force. Find the depth required. Draw a diagram to show the forces acting on the boat
September 16, 2021
a particle. 5. A fish tank has dimensions 36 cm wide by 1.0 m long by 0.60 m high. If the filter should process all the water in the tank once every 3.0 h, what should the flow speed be in the 3.0-cm?diameter input tube for the filter?
University of Michigan - Ann Arbor
University of Washington
Simon Fraser University
(I) A 7150-kg railroad car travels alone on a level frictionless track with a constant speed of 15.0 m/s. A 3350-kg load, initially at rest, is dropped onto the car. What will be the car's new speed?
(II) Superman must stop a 120-km/h train in 150 m to keep it from hitting a stalled car on the tracks. If the train's mass is $3.6 \times 10^5$ kg how much force must he exert? Compare to the weight of the train (give as %). How much force does the train exert on Superman?
Suman Saurav Thakur
(II) According to a simplified model of a mammalian heart, at each pulse approximately 20 $g$ of blood is accelerated from 0.25 m/s to 0.35 m/s during a period of 0.10 s. What is the magnitude of the force exerted by the heart muscle?
Create your own quiz or take a quiz that has been automatically generated based on what you have been learning. Expose yourself to new questions and test your abilities with different levels of difficulty.
Create your own quiz
Welcome to Unit 10 when we will talk about fluids in physics, a fluid might be a liquid or it might be a gas is anything that has a tendency to flow where the bonds don't hold it rigidly together. Eso, the physics of liquids and gasses are very similar, and we'll learn more about the physics of these later on in physics. 103 When we talk about thermodynamics for now, we're going to think exclusively about the forces exerted by these two things. Um, in order to have a conversation about that, there's a few things we need to understand, and that's what this video is about. First of all, we need to understand what the term density means. I've already used this in one sense when we talked about linear mass density in terms of a bar, and we were looking at its, uh, moment of inertia. But density in general just means that we have a mass divided by some spatial component. So usually there's three types of density that we see. There's volume density, which has volume the denominator. There's an area density which has an area and the dom denominator, and there's a linear density, which has a length in the denominator in this unit, will be principally concerned with row, which is kind of the classic idea about density. It's mass divided by volume, so when we write out density that's equal to If we think about the units, that's kilograms her meters cube. Okay, so there's not any special unit or name for the for density here. But there are lots of different ways to express meters cubed here because a lot of things aren't going to be on the order of a cubic meter. If you happen to have 3 m sticks around, grab them and use them to form three sides of a cube and see how large it is. It is an enormous amount of air of volume. Eso very often measuring things in cubic meters doesn't make a lot of sense. Because of that, we have other common measurements. Um, for example, if we wanted to convert from meters cube into centimeters, we'd say in each meter we have 100 centimeters and when we cube this notice that we're gonna have 100 times, 100 times, 100 so it's gonna be six zeros that we're gonna end up here with So one cubic meter is going to be equal to tend to the six cubic centimeters. Now there's a lot of space in between one cubic meter and tend to the six cubic centimeters eso It's helpful toe have something in between, which is why I tend to the three cubic centimeters is taken to be equal to something called a leader, which is probably the most common measurement of volume that you've come across cubic centimeters or ccs uh, shows up a lot, especially in the medical profession. Um, but the leader is what you're going to see most often when you're out shopping at this store. Eso will use all three of these the cubic meter the leader which is a capital l and the cubic centimeter. So you want to pay attention to this though the S I units are are generally based on the cubic meters, who will be converting ah lot back to cubic meters. But notice that so there's 1000 cubic centimeters in a leader and there's 1000 leaders inside a cubic meter. So the conversion between the three is not particularly challenging. Eso these air just some basic things that you want to keep track of as we start moving into our conversation about pressure and buoyancy in the next section.
Sound and Hearing
Thermal Properties of Matter