Saturday

April 19, 2014

April 19, 2014

Total # Posts: 21

**physics**

You are viewing a New Year's Day fireworks display at a distance of 1500 m. It is 4.0°C. How long does it take the sound of the fireworks exploding to reach you?

**physics**

A longitudinal wave spreads radially from a source with power 345 W. What is the intensity 40.0 meters away? answer in W/m^2.

**physics**

You are pulling your sister on a sled to the top of a 20.0 m high, frictionless hill with a 10.0° incline. Your sister and the sled have a total mass of 50.0 kg. You pull the sled, starting from rest, with a constant force of 127 N at an angle of 45.0° to the hill. If ...

**physics**

A small domestic elevator has a mass of 454 kg and can ascend at a rate of 0.180 m/s. What is the average power that must be supplied for the elevator to move at this rate ? answer in watts.

**physics**

A 10-kg duffle bag is undergoing a vertical acceleration of 0.65 m/s2 (positive for up, negative for down), while its owner is holding it with an upward force. What is the magnitude of this force?

**physics**

two carts are on a frictionless surface. a compressed spring acts upon te carts, and the 1.5 kg cart moves with a velocity 27 cm/s to the left. what is the velocity of the 4.5 kg cart?

**physics**

two campers dock a canoe. one camper steps onto the dock. this camper has a mass of 80 kg and moves forward at 4 m/s. with what speed and direction do the canoe and the other move if their combined mass is 110 kg?

**physics**

idk somehow i am doing well.

**physics**

i still dont understand:( what is mgh and what is PE??? what is m? i dont understnad many of the variables in this equation. i was never taught this in class neither have i ever heard of this equation. im sorry mr.pursley. i really am.

**physics**

anyone who knows the answer to this question please show your work. drwls i know i posted this queestion before but you didnt reply to my comment. Your friend has climbed a tree to a height of 6.00 m. You throw a ball vertically up to her and it is traveling at 5.00 m/s when i...

**physics**

anyone??? A juggler throws a ball from height of 0.950 m with a vertical velocity of +4.25 m/s and misses it on the way down. What is its velocity when it hits the ground? thanks.

**physics**

because you didnt answer my question about gravity. pls look at my prev. post

**physics**

anyone else know how to go about solving this complicated problem? Your friend has climbed a tree to a height of 6.00 m. You throw a ball vertically up to her and it is traveling at 5.00 m/s when it reaches her. What was the speed of the ball when it left your hand if you rele...

**chemistry**

i think you can use stoichiometry for this question. i shud help

**AP Physics**

oh.

**physics**

is g in this equation 9.8 or -9.8?

**physics**

is g in this equation 9.8 or -9.8?

**physics**

Your friend has climbed a tree to a height of 6.00 m. You throw a ball vertically up to her and it is traveling at 5.00 m/s when it reaches her. What was the speed of the ball when it left your hand if you released it at a height of 1.10 m?

**physics**

can anyone help me on this physics problem?

**physics**

can anyone help me on this physics problem?

**physics**

A juggler throws a ball from height of 0.950 m with a vertical velocity of +4.25 m/s and misses it on the way down. What is its velocity when it hits the ground?

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