Physics

a rod undergoes a change in temperature. the change in length is: a rod undergoes a change in temperature. the change in length is:
1 Answer
what is it called when you can see one image from one angle and a different image from a different angle?
1 Answer
helppp pleaseeee enough points
1 Answer
if you have an unmarked bar magnet and an identical unmagnetized bar of iron, how can you determine which is the magnet?
1 Answer
how hard must she pull downward to raise herself slowly at constant speed? the mass of the person plus the bucket is 77 kg .
1 Answer
a mass of 20kg is held stationary by a rope passing over a frictionless pally. what is the tension T in the rope?
1 Answer
a series circuit is a current divider and a parallel circuit is a voltage divider circuit. select one: a. true b. false
1 Answer
a net force of 89.0 n propels a 4.00-kg model rocket. after being launched from rest, how fast is the rocket traveling after 2.00 s? enter the numerical value in si units.
1 Answer
a new block of mass m is used. this block is made of a material that makes an elastic collision with the rod when the block and rod collide. will the hiehgt h increase, decrease, or stay the same?
1 Answer
A uniform electric field makes an angle of 60.0 with a flat surface. The area of the surface is 6.66104m2. The resulting electric flux through the surface is 4.44 Nm2/C.Calculate the magnitude of the electric field.(Express your answer with the appropriate units.)
2 Answers
Why a liquid needs a container when a solid does not?
1 Answer
if the moon enters its waxing crescent phase tonight, then what lunar phase will you see in approximately two weeks? multiple choice question.
1 Answer
What Enlightenment idea is represented by the headline
1 Answer
Explain why the transverse pulse traveling on a rope held by two people reflects in the opposite orientation each time it reaches a person.Drag the terms on the left to the appropriate blanks on the right to complete the sentences. ANSWER: - greater - oppose - second law - increase - smaller - the same- third law - first lawWhen a transverse wave pulse reaches a fixed end of the rope, the displacement of the rope end exerts a force on the object that is keeping the end fixed (in this case, a person). By Newton's ___ the person must exert a force of __ magnitude in ___ direction; otherwise the end of the rope would not remain stationary but would the opposite accelerate in the direction of the force due to the wave disturbance. Because this force acts to ___ the force of the incoming wave pulse, it initiates an outgoing wave pulse that is inverted with respect to the incoming wave pulse.
1 Answer
a planet of mass 4 x 10^14 kg is orbiting a parent star 548 km away. if the star is 83 times the mass of the planet, what speed must the planet have to keep a perfectly circular orbit around the star?
1 Answer
4. what is the name of the region where the most common type of comets, long period comets, come from, and how many of these objects exist?
1 Answer
if the gravitational force between two objects is 300 n and the mass of one object is 20.0 kg, while the other object is 30 kg, what is the distance between the objects?
1 Answer
the intensity of the sound of a television commercial is 10 times greater than the intensity of the television program it follows. by how many decibels does the loudness increase?
1 Answer
what is the acceleration on a body that approached the arth and comes within 6 earth radii of the earth's surface
1 Answer
if it takes 1 joule of work to move an object a distance of 1 meter with a force of 1 newton in 10 seconds, what should we expect about the amount of work required to move the same object the same distance but in 10 years
1 Answer
Which of Newton's laws explains why your hands get red when you press them hard against a wall?O A.Newton's law of gravityO B.Newton's first law of motionO C.Newton's second law of motionO D.Newton's third law of motion
1 Answer
if you turn on your car headlights during the day, the road ahead of you doesn't appear to get brighter. why not?
1 Answer
in uniform circular motion, which of the following quantities are constant? check all that apply. in uniform circular motion, which of the following quantities are constant?check all that apply. speed the magnitude of the net force centripetal acceleration instantaneous velocity
1 Answer
if the ball is in contact with the floor for 0.0300 seconds, what is the average force (in n) the floor exerts on the ball?
1 Answer