Physics

height of the image formed by a lens is-2cm.0what is the nature of the image?
1 Answer
Which of these forces pull or push upward, and which pull or push downward? Explain.
1 Answer
Pls help I need this done soon 50 points
2 Answers
The throwing back by a wall or barrier of a sound wave without absorbingit. *1 point
1 Answer
If the acceleration of the projective is: a = c s m/s 2 Where c is a constant that depends on the initial gas pressure behind the projectile. The initial position of the projectile is s=1.5m and the projectile is initially at rest. The projectile accelerates until it reaches the end of the barrel at s=3m. What is the value of the constant c such that the projectile leaves the barrel with a velocity of 200 m/s?
1 Answer
Dinesh wants to launch a package over the garden wall to his friend on the other side. His plan is to set up a see-saw, put the package on one end and jump on the other end. Dinesh determines that he will land on the board with a force of 1,127 newtons, and the package weighs 322 newtons. The board he is going to use for the see-saw is 9 meters long. How close to the end of the board should Dinesh put the fulcrum?
1 Answer
Geologists have divided rocks into three different categories based on ______
1 Answer
A disk with a rotational inertia of 2.5 kg-m2 and a radius 1.1 m rotates on a frictionless fixed axis perpendicular to the disk faces and through its center. A force of 7.7 N is applied tangentially to the rim. The angular acceleration of the disk is _____ rad/s2. Round your answer to the nearest tenth.
1 Answer
Two astronauts, connected by a massless cord of length 10 m, sit motionless in deep space. The astronaut masses are ????1 = 60 kg and ????2 = 100 kg. The astronaut with mass ????1 catches a package of mass m = 20 kg tossed to him from the left with a velocity v = 2 m/s. Treat the astronauts as if they are point masses. (a) (5 points) The final system rotates about the center of mass of the system. What is yC????? Take y=0 to be the position of the top astronaut.
1 Answer
A beam of electrons with a speed of is incident on a slit of width 200. nm. The distance to the detector plane is chosen such that the distance between the central maximum of the diffraction pattern and the first diffraction minimum is 0.300 cm. How far is the detector plane from the slit?
1 Answer
Wolves, which are top predators, were eliminated from Yellowstone National Park in the 1930s. In 1995, wolves were reintroduced into Yellowstone. During the period in which wolves were absent from Yellowstone, which MOST likely occurred? A. an increase in competition for food resources among small prey B. a greater opportunity for primary producers to flourish C. an increase in the population of tertiary consumers D. a greater balance of predator-prey relationships
1 Answer
very thin 15.0 cm copper bar is aligned horizontally a l ong the east - west direction. If it moves horizontally from south to north at 11.5 m/s in a vertically upward magnetic field of 1.22 T, A) what potential difference is induced across its ends, and B) which end (east or west) is at a higher potential
1 Answer
You get yourself a new mirror so that you can admire yourself in the morning. When you open the box, you notice that it is only your height. You think to yourself "This is no good! Now I can't see all of me!" You put it up anyway and realize that you can see your entire body in it. How can this be?
2 Answers
A 100 kg bag of sand has a weight on 100 N. When dropped its acceleration is what?
1 Answer
Un recipiente contiene 2,5 moles de gas propano. Calcula, utilizando la definicin de mol, cuntas molculas de propano (C3H8) contiene ese recipiente.POR FAVOR NO LO ENTIENDO Y CON SUS OPERACIONES PLISS
1 Answer
A steady increase in global temperature has been recorded between 1900 and today. Before concluding that this rise in temperature is the result of the increased burning of fossil fuels since that sametime, which of the following questions would have to be answered? *A. What is the CO2 content in one metric ton of fossil fuels?B. Which gases are released when burning fossil fuels?C. What, if any, temperature rise was occurring prior to 1900?D. None of these
2 Answers
Which two gases in the atmosphere are essential to life on Earth? *Nitrogen and HeliumOxygen and Carbon DioxideNeon and ArgonHydrogen and Helium
1 Answer
what is a Rube Goldberg machine and show me a pic? PLEASE.
1 Answer
Serena Williams consistently serves a tennis ball with a top speed of 128 mph. The ball is accelerated essentially from rest (assume v0 = 0 mph) to top speed while it is in contact with the racket for 5 milliseconds. LaTeX: a=\frac{\left(vf-vo\right)}{t}a = ( v f v o ) t Where a is the acceleration, vf is the final (top) velocity, v0 is the initial velocity, and t is time. If the mass of the average tennis ball is 5.85 g, what force must Serena exert on the ball during that time to achieve the required acceleration, in units of Newtons?
1 Answer
Nitrogen-14 has 7 protons. How many neutrons does it have?
1 Answer
please answer I'll give brainlistAssuming the sound wave moves with the speed of air ( 340 m/s), what is the wavelength of the wave?
1 Answer
The voltage in a circuit is given by the equation V= IR.in this equation v is the voltage Iis correct and R is the resistance which answer shows this equation solved for current?
2 Answers
ASAP if you answer right I will mark brainiest....
1 Answer
PLEASE HELP ASAP!!!!!!!!!!!!
1 Answer