Thursday

July 31, 2014

July 31, 2014

Total # Posts: 9

**Pre-Algebra**

Write an expression for the model. Find the sum. A. 2 + 3; 5 B. 2 + (–3); 1 C. 2 + (–3); –1 D. –3 + 2; 5

**analogies**

what are analogies? whats analogy for spread?

**math**

how do you make a model for the product of 0.04 multiplyied by 8

**physics**

A hiker determines the length of a lake by listening for the echo of her shout reflected by a cliff at the far end of the lake. She hears the echo 1.7 s after shouting. Estimate the length of the lake.

**physics**

A fisherman's scale stretches 3.9 cm when a 2.8 kg fish hangs from it. (a) What is the spring stiffness constant? N/m (b) What will be the amplitude and frequency of vibration if the fish is pulled down 2.7 cm more and released so that it vibrates up and down? amplitude cm...

**physics**

In preparing to shoot an arrow, an archer pulls a bowstring back 0.43 m by exerting a force that increases uniformly from 0 to 268 N. What is the equivalent spring constant of the bow? N/m

**physics**

A child's toy consists of a piece of plastic attached to a spring, as shown below. The spring is compressed against the floor a distance 1.8 cm and released. If the spring constant is 107 N/m, what is the magnitude of the spring force acting on the toy at the moment it is ...

**physics**

A spring with a spring constant of 1.50 102 N/m is attached to a 1.2 kg mass and then set in motion. (a) What is the period of the mass-spring system? s (b) What is the frequency of the vibration? Hz

**ecomonics**

P=8, Q=16000

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