Physics

The only major country that does not use the metric system A. France B. United States C. Russia D. England
1 Answer
What do radio waves and gamma rays have in common? They are both electromagnetic waves. They are both low frequency waves. They can only travel in a vacuum. They both are part of the visible light spectrum.
2 Answers
Which of the following will most likely be a sustainable environment?A. An environment with a small variety of plants and animal speciesB. An environment with a large variety of plant and animal speciesC. An environment with many plant species but with only a few animal speciesD. An environment with many animal species but with only a few plant species
2 Answers
Explain in yourown words howyou would findthe density of aregular-shapedobject.
1 Answer
Which one of the statements below is true about mechanical waves?They must travel in empty space.They can travel in a vacuum.Both sound and light are examples of mechanical waves.They require a medium to travel through.
1 Answer
the statement from which investigation is an example of repetition? *answer choices in picture*
2 Answers
True or False:If you look at the night sky and see a very bright star, you can tell that that star is closer to Earth than all the other stars.
2 Answers
Pushing open door .action force and reaction
2 Answers
There is a bell at the top of a tower that is 45 m high. The bell weighs 190 kg. The bell hasenergy. Calculate it
2 Answers
In a movie production, a stunt person must leap from a balcony of one building to a balcony 3.0 m lower on another building. If the buildings are 2.0 m apart, what is the minimum horizontal velocity the stunt person must have to accomplish the jump? Assume no air resistance and that ay = g = 9.81 m/s2 . (Ans. 2.6m/s) PLS SHOW WORK
2 Answers
A longitudinal wave is a type of wave that transfers energy
2 Answers
A cog system on the beginning segment of a roller coaster needs to get 29 occupied cars up a 120-m vertical rise over a time interval of 60 s. Each car experiences a gravitational force of 5900 N. The cars start at rest and end up moving at 0.50 m/s.
1 Answer
A ray in glass is incident onto a water-glass interface. The angle of incidence equals 0.75 times the critical angle for that interface. The index of refraction for water is 1.33 and for glass is 1.78. What is the angle that the refracted ray in the water makes with the normal?52 degrees42 degrees48 degrees63 degrees
1 Answer
The first law of Thermodynamics is another way to describe the law of conservation of Energy. It states that:
1 Answer
A circular loop of radius 15 cm carries a current of 11 A. A flat coil of radius 0.79 cm, having 66 turns and a current of 1.9 A, is concentric with the loop. The plane of the loop is perpendicular to the plane of the coil. Assume the loop's magnetic field is uniform across the coil. What is the magnitude of (a) the magnetic field produced by the loop at its center and (b) the torque on the coil due to the loop
1 Answer
Is sodium chloride a reactant
1 Answer
A boy who is riding his bicycle, moves with an initial velocity of 5 m/s. ten second later, he is moving at 15 m/s. what is his acceleration
1 Answer
a disk of radius 10 cm speeds up from rest. it turns 60 radians reaching an angular velocity of 15 rad/s. what was the angular acceleration?b. how long did it take the disk to reach this velocity?
1 Answer
A decibel measures the _____________ of sound.A.pitchB,frequencyC.loudnessD.amplitude
1 Answer
A car travels 60km in 45 minutes. At the same average speed, how far will it travel in 1 hour 30 minutes?
1 Answer
Heat transfer in liquids or gases that happens due to currents of hot and cold is calledEntropyConductionConvectionRadiation
1 Answer
Drink water at least everyweather.minutes while exercising in hot
2 Answers
How much power is required to do 10 J of work on an object in 2 seconds?
1 Answer
Which of the following situations best represents a set of balanced forces?Group of answer choicesA 12 N of force pulling left while a 22 N of force pulls right.A 6 N of force pulling left while a 10 N of force pulls right.A 2 N force and a 10 N force pulling left while a 12 N force pulls right.A 22 N force pulling left while a 6 N force and a 12 N force pulls right.
1 Answer