Posted in Physics

Please login to view the answer

Login
Join us

Related Questions

Posted in Physics

Which of the following statements about physical science are true? A. Observation is not important when studying physical science. B. Geology, biology, and other sciences are based in physical science. C. Physics deals with forces and matter that you can often see and touch. D. Chemistry deals with forces and matter on a scale too small to see or touch.

Please login to view the answer

Login
Join us

Posted in Physics

Two long, straight wires are separated by 0.12 m. The wires carry currents of 4.0 A in opposite directions, as the drawing indicates. Find the magnitude of the net magnetic field at the point A.

Please login to view the answer

Login
Join us

Posted in Physics

Compare and contrast the apparent magnitude with the absolute magnitude of a star

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Physics

A radio wave has a wavelength of 300 m. The wave moves with a speed of 3.0 × 108 m/s. What is the frequency of the radio wave? A. 1.0 × 106 Hz B. 1.0 × 10-5 Hz C. 1.0 × 10-6 Hz D. 1.0 × 105 Hz

Please login to view the answer

Login
Join us

Posted in Physics

Jake is in chemistry class. He makes a list of the chemicals his instructor described and the properties of each. Silver: bonds with other atoms because of the weak forces of the valence electrons Water: bonds allow for liquid state at room temperature and prevent conduction Carbon: bonds with other atoms through strong shared electrical bonds Niobium: bonds allow for a strong conductivity found in stainless steel Which is most likely true about the chemicals?

Please login to view the answer

Login
Join us

Posted in Physics

A 50 kg crate is pulled across the ice by a rope that is angled at 30 degrees above the horizontal. If the tension in the rope is 100 newtons, what is the magnitude of the “lifting” and “pulling” components of the force in the rope?

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Physics

Add the following forces: 20 Newtons south, 30 newtons north, 40 newtons east, and 50 newtons west

Please login to view the answer

Login
Join us

Posted in Physics

Inertia keeps your vehicle moving until a force slows it down, like __________. A. applying the brake B. strong winds C. another vehicle D. both A and C

Please login to view the answer

Login
Join us

Posted in Physics

How much power is produced by a flashlight that has a voltage of 12 volts and a current of 6.5 × 10-2 amps? 0.78 watts 78 watts 190 watts 0.0054 watts 1.9 watts

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Physics

A 300.0-kg speedboat is moving across a lake at 35.0 m/s. What is the momentum of the speedboat? A) 10,500 kg m/s2 B) 10,500 kg m/s C) 5,250 kg m/s2 D) 91,875 kg m/s

Please login to view the answer

Login
Join us

Posted in Physics

An automobile with a mass of 1243 kg accelerates at a rate of 5 m/s² in the forward direction. what is the net force acting on the automobile? n

Please login to view the answer

Login
Join us

Posted in Physics

If you exert a force of 700n to walk 6m up a flight of stairs in 6s how much power do you use

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Physics

Which layers of earth has highest pressure ,temperature, and density?

Please login to view the answer

Login
Join us

Posted in Physics

What will be the restoring force if a spring with a spring constant of 45 newtons per meter is pulled 0.30 meters in the downward direction?

Please login to view the answer

Login
Join us

Posted in Physics

What’s the value of 1,152 Btu in joules? A. 1,964,445 J B. 2,485,664 J C. 987,875 J D. 1,215,360 J

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Physics

What would happen if there were no action-reaction forces in effect and you tried walking down a sidewalk

Please login to view the answer

Login
Join us

Posted in Physics

Approximately how many calories should a person who weighs 160 pounds consume per day

Please login to view the answer

Login
Join us

Posted in Physics

Which of the following statements correctly describes the models put forth by Ptolemy and Copernicus to explain the universe? A. Both of the models were easy to understand and thus were well received by the public almost instantly. B. Through observations, both astronomers presented models where the earth remained stationary. C. The model developed by Copernicus was simpler and had less inconsistencies than Ptolemy’s model. D. The sun was in the center of Ptolemy’s model, but the Earth was in the center of Copernicus’ model.

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Physics

An SUV is traveling at a speed of 18 m/s. If the SUV has a mass of 1,550 kg, what force must be applied to stop it in 8 seconds? A. –4,030.7 N B. –2.25 N C. –2,700.0 N D. –3,487.5 N

Please login to view the answer

Login
Join us

Posted in Physics

Imagine that a new planet is discovered with two moons of equal mass, moon A and moon B. The mass of the new planet is greater than the combined mass of its moons. Moon A is farther away from the new planet than moon B. What is the planets gravitational pull on moon A compared to the gravitational pull on moon B

Please login to view the answer

Login
Join us

Posted in Physics

I would appreciate some help. A machine has an efficiency of 70%. How much work does the machine do when 20,000 J of work is done on it? 14,000 J 28,600 J 1,400,000 J 2,860,000 J

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Physics

In an area in which electricity costs 8 cents/kilowatt-hour, a 5 kW clothes dryer runs for 90 minutes to dry a load of laundry. How much did it cost to dry these clothes? These are the choices $0.20 $0.30 $0.45 $0.60 Please help!!!!!!!!!!!!

Please login to view the answer

Login
Join us

Posted in Physics

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force? Check all that apply. A) Nuclear binding energy holds the nuclear particles together B) Nuclear binding energy is the energy needed to separate nuclear particles. C) The strong nuclear force holds an atom’s protons and neutrons together. D) The strong nuclear force is the energy released during radioactive decay processes. E) The strong nuclear force is directly responsible for radioactive decay. F) Nuclear binding energy can be calculated using E = mc2.

Please login to view the answer

Login
Join us

Posted in Physics

In which of these samples do the molecules most likely have the least kinetic energy? solid iron at 25°C molten iron at 1600°C solid iron at 98°C iron vapor at 2900°C

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Physics

Can someone check my answers please?? Which of these is true about a bar magnet? Its north pole tends to point south. Its poles can be separated into two isolated poles. Its poles attract or repel because of their net electric charge. —–> It attracts unmagnetized iron objects by making them magnetically polarized.

Please login to view the answer

Login
Join us

Posted in Physics

The fast server in women’s tennis is Venus Williams, who recorded a serve of 130 mi/h (209 km/h) in 2007. If her racket pushed on the ball for a distance of 0.15 m, what was the average acceleration of the ball during her serve?

Please login to view the answer

Login
Join us

Posted in Physics

How much time does it take a person to walk 12km North at a velocity of 6.5km/h? Show work and explain your process!!! V = D = T =

Please login to view the answer

Login
Join us

Online Tutors To Help You

Posted in Physics

Pleaseee HElpp!!!!!!! The electric force between two charged vinyl balloons is 3.0 × 10-3 newtons. If the distance between them is 6.0 × 10-2 meters and the charge of one vinyl balloon is 3.3 × 10-8 coulombs, what is the charge on the other vinyl balloon? (k = 9.0 × 109 newton·meter2/coulombs2) 3.3 × 10-8 coulombs 3.6 × 10-6 coulombs 4.8 × 10-8 coulombs 6.0 × 10-8 coulombs 3.3 × 10-3 coulombs

Please login to view the answer

Login
Join us

Posted in Physics

Calculate ΔH∘f (in kilojoules per mole) for benzene, C6H6, from the following data: 2C6H6(l)+15O2(g)→12CO2(g)+6H2O(l) ΔH∘ = -6534kJ ΔH∘f (CO2) = -393.5kJ/mol ΔH∘f (H2O) = – 285.8kJ/mol

Please login to view the answer

Login
Join us

Posted in Physics

Select all of the answers that apply. Relative dating uses laws or principles of stratigraphy and paleontology. These laws of relative dating are: law of harmonies law of original horizontality law of superposition law of original lateral continuity law of gravity and oppositional force law of cross-cutting or intrusive relationships law of floral and faunal succession law of ellipses

Please login to view the answer

Login
Join us

Online Tutors To Help You