Question 7 of 10
A student is transmitting sound waves through various materials. Through
whi...
Physics, 28.01.2021 20:00 kaelah6846
Question 7 of 10
A student is transmitting sound waves through various materials. Through
which metal in the table will the sound waves travel the fastest?
Aluminum
Copper
Lead
Brass
(70% Cu,
30% Zn)
6,420
4,700
5,010
1,960
Speed of
sound
(m/s)
A. Copper
B. Brass
Ο Ο Ο Ο
C. Aluminum
O D. Lead
Answers: 2
Physics, 22.06.2019 12:30
An engine undergoes a cycle as shown in the diagram. during a complete cycle the work done by the gas is 28.5×103 j and the energy transferred thermally out is 99.4×103 j. there are 1.5×1024 gas molecules and they have three active degrees of freedom. 6. (6 pts) during which process(es) is energy transferred thermally into the gas? a. 1→2 b. 2→3 c. 4→1 d. 1→2 and 4→1 e. none of the above
Answers: 3
Physics, 22.06.2019 16:30
He latent heat of vaporization for ethyl alcohol is 854 j/g. the amount of energy, rounded to the nearest whole number, needed to change 5.20 grams of ethyl alcohol from a liquid to a gas is
Answers: 2
Physics, 22.06.2019 20:20
The base of a 50-meter tower is at the origin; the base of a 50-meter tree is at (0, 50, 0). the ground is flat and the z-axis points upward. the following parametric equations describe the motion of six projectiles each launched at time t = 0 in seconds. (i) r (t) = (50 + t2)k (ii) r (t) = 2t2 j + 2t2k (iii) r (t) = 50 i + 50 j + (50 − t2)k (iv) r (t) = 2t j + (50 − t2)k (v) r (t) = (50 − 2t) i + 2t j + (50 − t)k (vi) r (t) = t i + t j + tk (a) which projectile is launched from the top of the tower and goes downward? at time t = , the projectile hits the ground at point (x, y, z) = . (b) which projectile hits the top of the tree?
Answers: 2
Physics, 23.06.2019 03:40
Anumber of conditions are required for a population to be in hardy-weinberg equilibrium. which of the following are correct descriptions of the conditions that must be met? check all that apply. a. no mutations b. random mating c. small population d. migration or gene flow e. occurrence of mutations f. no natural selection
Answers: 1
Mathematics, 26.10.2020 18:50
Mathematics, 26.10.2020 18:50
History, 26.10.2020 18:50
Geography, 26.10.2020 18:50
Computers and Technology, 26.10.2020 18:50
Mathematics, 26.10.2020 18:50
Arts, 26.10.2020 18:50
Health, 26.10.2020 18:50
Mathematics, 26.10.2020 18:50
Social Studies, 26.10.2020 18:50
Mathematics, 26.10.2020 18:50
Mathematics, 26.10.2020 18:50
Health, 26.10.2020 18:50