Friday
April 18, 2014

Posts by Sangita


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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