![ansver](/tpl/images/cats/User.png)
Answers: 1
Another question on Physics
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 01:30
Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.
Answers: 1
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 16:30
The air in an automobile tire with a volume of 2.60 ft3 is at 70°f and 21 psig. determine the amount of air that must be added to raise the pressure to the recommended value of 30 psig. assume the atmospheric pressure to be 14.6 psia and the temperature and the volume to remain constant. the gas constant of air is ru = 53.34ft⋅lbflbm⋅r(1 psia144 lbf/ft2) = 0.3704 psia⋅ft3lbm⋅r the amount of air that must be added to raise the pressure is lbm
Answers: 3
![question](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 18:30
Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton
Answers: 2
![question](/tpl/images/cats/fizika.png)
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
You know the right answer?
Based on galaxies what is the world doing...
Questions
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/ekonomika.png)
Business, 24.10.2021 14:00
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/health.png)
Health, 24.10.2021 14:00
![question](/tpl/images/cats/mat.png)
Mathematics, 24.10.2021 14:00
![question](/tpl/images/cats/mat.png)
Mathematics, 24.10.2021 14:00
![question](/tpl/images/cats/mat.png)
Mathematics, 24.10.2021 14:00
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 24.10.2021 14:00
![question](/tpl/images/cats/mat.png)
Mathematics, 24.10.2021 14:00
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/en.png)
English, 24.10.2021 14:00
![question](/tpl/images/cats/mat.png)
Mathematics, 24.10.2021 14:00
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 24.10.2021 14:00
![question](/tpl/images/cats/ekonomika.png)
Business, 24.10.2021 14:00
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/fizika.png)
Physics, 24.10.2021 14:00