Physics

The Ossicle and Ultrasound

Of all the materials in the body, water produces by far the least attenuation. This means that water is a very good conductor of ultrasound. Water within the body, such as that within cysts and the bl

A car traveling initially at +7.0m/s accelerates uniformly at the rate of +0.80 m/s^2 for a distance of 245 m.

a. what is its velocity at the end of the acceleration? b. what is its velocity after if accelerates for 125 m? c. what is its velocity after it accelerates for 67 m?-a. what is its velocity at the en

Hard physics problem!

I just have no idea how to solve this! Link of the picture : http://tinypic.com/r/16k2hvt/7 The suspended 2.4 kg mass on the right is moving up, the 1.4 kg mass slides down the ramp, and the suspe

What equation would I use to solve this problem

In a college parking lot, the number of ordinary cars is larger than the number of sport utility vehicles by 77.3%. The difference between the number of cars and the number of SUVs is 17. Find the num

Bernoulli's Principle conceptual question

So, I understand that for a fluid flowing (in a pipe, for example), an area decrease between points 1 and 2 results in a velocity increase. I also understand that this velocity increase is a result of

Need help with physics homework PLZZZ!!!

1. A car traveling _ km/h is _ m behind a truck traveling _ km/h. How long will it take the car to reach the truck? 2. If you are driving _ km/h along a straight road and you look to the side for _1.

An elevator filled with passengers has a mass of 1700 kg...

...a) the elevator accelerates upward from rest at a rate of 1.2m/s2 for 1.5s. Calculate tension. I got the answer correct for this, by doing mg+ ma= 1700*9.8 + 1700*1.2= 18700N b) The elevator cont

How much you know about forces and motion

Sally is working at the Ekka, and has to push a 10.0kg box of showbags up a 30 ramp to load them onto a truck. The ramp is 3.0m long and we can assume that Sally applies a constant force to the box p

Whats the difference between the reaction force of punching the air and punching a wall

What happens and why does it only hurt if you punch a wall?-ok

Very easy Work Energy question help please?! :)

A pump lifts water from a level of 10m below the ground. Water is pumped at a rate of 30kg/minute with negligible velocity. Calculate the minimum horsepower the engine must have to do this. Please

What does the tongue do to the sound resonation in our mouth that makes sounds b and c different

Wrong category

Difficulty understand a(geometry) 'POINT' and 'Distance' in physics/mathematics

A point is -A dimensionless geometric object having no properties except location. My brain cant seem to comprehend this can anyone help ?i think because its dimensionless that it gets me Also dista

Center of mass understanding

pparantly An object acts like all its mass is concentrated at the center of mass.... In what way does an object act like all its mass is concentrated at the center of mass? it clearly to me doesnt ca

Simple conceptual pressure problem

If you take an empty cup and submerge it upside down in water it remains empty while underwater. Why is this? Try to explain what exactly is happening, not just pressure difference.-If you take an emp

Why can't I get a flame using the Solar Spark lighter (parabolic mirror)

I can get things to smoke, and I can get incense to light... But I cant produce a flame on anything, or get a candle to light. Any help here? I know it sounds retarded that I cant start a fire, but..