Friday

April 18, 2014

April 18, 2014

Total # Posts: 26

**Bio3**

You want to dilute 10M sulfuric acid to make 500mL of 1M sulfuric acid. How much 10M sulfuric acid should you measure?

**Pre-Calculus**

What is the inverse of matrix A, to the nearest tenth? -2 7 A= 6 -8

**Pre-Calculus**

Find the inverse of matrix A. .6 -2 A= 6 -18

**Pre-Calculus**

What is the inverse of matrix C, to the nearest hundredth? 10 -6 C= -12 2

**Pre-Calculus**

How many terms of the series 12+4+4/3+4/9+..., are needed to yield a sum of 1459/81?

**Pre-Calculus**

can you explain how you got that?

**Pre-Calculus**

Express the repeating decimal as a ratio of two integers. 1.23535353535...

**Pre-Calculus**

Express the repeating decimal as a ratio of two integers. 2.6231313131....

**Pre-Calculus**

How many terms of the series -6+0+6+12+... are needed to yield a sum of 324?

**Trigonometry**

sorry, they're all squared θ not 2 θ

**Trigonometry**

Which of the following is equivalent to 1 − cos 2 θ/cos 2 θ? A. sec2 θ B. (csc 2 θ ) -1 C. tan 2 θ D. sin 2 θ E. –1/sin2 θ

**Trigonometry**

What is the smallest positive value for x where y = sin 2x reaches its maximum?

**government**

why has the national government's power increased since the constitution was ratified? Explain fully.

**government**

How does the supremacy clause make federalism work? Discuss.

**Physics**

When a mass of 28 g is attached to a certain spring, it makes 18 complete vibrations in 4.1 s. What is the spring constant of the spring? Answer in units of N/m.

**Physics**

Microwaves travel at the speed of light, 3.00×108 m/s. When the frequency of microwaves is 5.60×109 Hz, what is their wavelength? Answer in units of m.

**Physics**

If a spring with a spring constant k = 10 N/m is stretched from its equilibrium position by 0.1 m, and released, what would be the maxi- mum kinetic energy at any time in its motion? Neglect friction. 1. 0.025 J 2. 0.1 J 3. Not enough information given 4. 0.05 J 5. 1 J

**Physics**

A 52 kg skier is at the top of a slope, as in the figure. At the initial point A, the skier is 12.4 m vertically above the final point B. The acceleration of gravity is 9.81 m/s2 .Find the difference in potential energy if the zero level is midway down the slope, at a height o...

**Physics**

A 79.4 kg bobsled is pushed along a horizontal surface by two athletes. After the bobsled is pushed a distance of 7.1 starting from rest, its speed is 4.7 m/s. Find the magnitude of the net force on the bobsled. Answer in units of N.

**Physics**

Two bullets have masses of 4.6 g and 11 g, respectively. Each is fired with a speed of 41.0 m/s. a) What is the kinetic energy of the first bullet? Answer in units of J.

**Physics**

A 2.0×103 kg car accelerates from rest under the action of two forces. One is a forward force of 1153 N provided by traction between the wheels and the road. The other is a 939 N resistive force due to various frictional forces. How far must the car travel for its speed ...

**Physics**

Two objects of same material are travelling near you. Object A is a 1.9 kg mass traveling 8.3 m/s; object B is a 2 kg mass traveling 5 m/s. Which object would make you feel worse if you are hit by it?

**Physics**

A 3.79 kg ball is dropped from the roof of a building 163.8 m high. While the ball is falling to Earth, a horizontal wind exerts a constant force of 11.5 N on the ball. It takes 5.77 second to hit the ground. How far from the building does the ball hit the ground? Answer in un...

**Physics**

A 3.79 kg ball is dropped from the roof of a building 163.8 m high. While the ball is falling to Earth, a horizontal wind exerts a constant force of 11.5 N on the ball. How long does it take to hit the ground? The acceleration of gravity is 9.81 m/s2 . Answer in units of s.

**Algebra 1**

8x-9<-49 +9 + 9 __________ 8x < -40 __ __ 8 8 x < -5

**high school**

The earth exerts a force of 1400 N on an orbiting communications satellite that is 35 mi above the Earth. What is the magnitude of the force the satellite will exert on the earth? Answer in units of N.

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