# Bill

Newest questions and responses by Bill
1. ## math

Sound travels at 343 meters per second. You measured 3 seconds for sound travel from place A to place B. What is the distance between and A and B?

2. ## programming

write a program that will calculate the average of the total marks scored by 10 students, if each student has done 4 exams.

3. ## Math

Find all $z$ such that $(z+1)^7 = z^7.$You do not have to put your answer in the simplest rectangular or exponential form.

4. ## social studies

Which theory do most scientists believe about the first inhabitants of North America? A. They walked across the frozen Bering Land Bridge. B. They swam across the Pacific Ocean. C. They sailed across the Atlantic Ocean.---------- D. They walked across the

5. ## Physics

A small ball of mass m is placed on top of a large ball of mass 3m. Both balls are dropped simultaneously from a height h = 5.50 m as shown in the figure. Assuming the radius of the large ball and small are small and thus negligible in comparison to the

6. ## Physics

You throw a baseball directly upward at time t=0 at an initial speed of 13.1 m/s. What is the maximum height the ball reaches above where it leaves your hand? Ignore air resistance and take g=9.80 m/s2. maximum height: At what times does the ball pass

7. ## physics

Helium occupies a volume of 0.04m3 at a pressure of 2*10^5 PA and temperature of 27 degree Celsius.Calculate the rms speed of its molecule and the average translational kinetic energy of one of this gas.

8. ## physics

mathematical,express the relationship between number of moles,number of molecules and avogadros constant

9. ## Physics

I got 4V1 a fixed mass of gas at constant pressure occupies a volume.the gas undergoes a rise in temperature so that the Vrms of its molecule is doubled.What is the new volume

10. ## Algebra

What is the answer to in music what does allegro mean Idk the answer Allegra with pizzazz

11. ## Physics

please I and my friend has been trying this one. If there there are 2.7*10^19 molecules are there in 1.0cm3 of a gas at 273k and pressure 1.0*10 ^5Pa. How many molecules are there in 1.0cm3 of the gas at 350k and pressure 1.0*10 ^5Pa.

12. ## physics

A lagged copper rod has a uniform cross-sectional area of 1.0cm3 and length 20.0cm. when steady state is attained, the temperature of one end of the rod is 120degree Celsius and other end is 0degree Celsius. Calculate; (1)the temperature gradient (2).rate

13. ## Physics

a fixed mass of gas at constant pressure occupies a volume.the gas undergoes a rise in temperature so that the Vrms of its molecule is doubled.What is the new volume

14. ## physics

A rotating turntable of mass 200g and radius 10 cm is uniformly accelerated from rest to attain it's maximum velocity of 33 and half revolution per minute through an angular displacement of 240 degree . Determine the (1). uniform angular acceleration.

15. ## Physics

The international space center is 1500km above the earths surface. Determine the escape velocity of a rocket launched into space at this altitude if the mass of the earth is 6*10^24kg and the radius is 6.4*10^6m.

16. ## Physics

During take-off the angular velocity of the blades of a revving engine of engine of an air craft change from 350rev/min to 570rev/min in a time interval of 15minutes. Determine (1).uniform angular acceleration in rad/sec (2).angular displacement during the

17. ## Physics

A rotating turntable of mass 200g and radius 10 cm is uniformly accelerated from rest to attain it's maximum velocity of 33 and half revolution per minute through an angular displacement of 240 degree . Determine the (1). uniform angular acceleration.

18. ## Physics

The international space center is 1500km above the earth surface. Determine the escape velocity of a rocket launched into space at this altitude if the mass of the earth is 6.0*10^-24kg and the radius is 6.4*10^6 m.

19. ## Physics

A uniform beam of mass 2kg and length 4cm is rotated about an axis 8cm from one end.Determine it's moment of inertia

20. ## Physics

Determine the escape velocity at a location 2.5*10^4km from the surface of Jupiter

21. ## Chemistry

an unknown compound is known to contain 30.34%N and 60.56%O and has a molar mass of 92.00g. what are the empirical formula and the molecular formula for the compound?( O=16.0g/mol,N=14.1g/mol)

22. ## Chemistry

an unknown compound is known to contain 30.34%M and 60.56%O and has a molar mass of 92.00g. what are the empirical formula and the molecular formula for the compound?( O=16.0g/mol,M=14.1g/mol)

23. ## Chemistry

State the relationship between normality and molality

24. ## Physics

A body of mass m is moving a circular track of radius r with a tangential velocity V. Write an expression for *The angular momentum *The centrifugal force

25. ## Physics

A rocket of mass,m is located at an alttitude h meters above the surface of a planet of a mass,M and radius, R. *write an expression for the gravitational pull on it. *Deduce an expression for the gravitational potential and escape velocity at that

26. ## Civics

Which of the following statements best describes a negative consequence of the federal government's use of credit? A. The government can use money from securities sales to help people in emergencies. B. Government use of credit increases the total national

27. ## math

A rectangular prism has dimensions 4 by 6 by x. If the total surface area of the prism is 496 square units, what is the value of x?

28. ## maths

Amber bought a shirt for 26.95 dollars. The shirt had been marked down 30 percent. What was the original price of the shirt?

94. ## physics

an initially resting 300g car is dragged along a horizontal frictionless table by a massless cord. The cord is attached to vertically hanging 60g mass by a frictionless massless pulley. If the car starts from rest, determine the time it would take for it

95. ## math

a board of 4 members is going to be formed from the 30 students of a class. The board is formed of a president a vice president a secretary and a treasurer. What is the number of possible boards knowing that each of the 30 students can occupy any post?

96. ## math

four girls bought each a swimsuit and decided to borrow among themselves. How many possible ways can they dress up knowing that each girl can use the same swimsuit only once?

97. ## math(counting)

an anagram of a word is obtained by permuting its letters. a-how many anagrams does the word "MAIRE" have b-Same question for the word "OISEAU"

98. ## math(counting)

in how many different ways can 3 boys and 2 girls sit on a bench? in how many different ways can they sit knowing that the boys have to sit near each other and the girls also

Point $G$ is the midpoint of median $\overline{XM}$ of $\triangle XYZ$. Point $H$ is the midpoint of $\overline{XY}$, and point $T$ is the intersection of $\overline{HM}$ and $\overline{YG}$. Find the area of $\triangle MTG$ if $[XYZ] =150$.
Altitudes $\overline{XD}$ and $\overline{YE}$ of acute triangle $\triangle XYZ$ intersect at point $H$. If the altitudes intersect at a $123^\circ$ angle, and $\angle YXH = 26^\circ$, then what is $\angle HZX$ in degrees?