Physics

for an incandescent bulb, initial cost may be high but the energy costs will be low over its life time. (1 point) group of answer choices true false
1 Answer
c) the rubber band is stretched under a constant tension. will it shrink when you warm the rubber band under the constant tension? do your analysis.
1 Answer
if 22.5L of nitrogen at 748 mm Hg are compressed to 725 mm hg at constant temperature what is the new volume?
1 Answer
you take two similar photos. the settings for proper exposure are: iso 100, f-5.6 at 1/60 shutter speed. you want to shoot a photo at 1/500 shutter speed, but keep your f-stop at 5.6. to compensate for the difference in light, what will you set your iso in order to keep proper exposure?
1 Answer
g two waves of light, wave a and wave b have the same speed. wave a has a wavelength of 235 nm and wave b has a wavelength of 515 nm. what can you say about the frequency?
1 Answer
to form cloud droplets in the sky, water vapor molecules must have a surface on which to adhere, a (an) .
1 Answer
what is the name of the furnace that is vertical cylindrical and equipped with a tapping spout near its base.
1 Answer
two people are yelling at the same time. one yells with an intensity level of 80.0 db, and the other at 90.0 db. what is the total sound intensity level?
1 Answer
will you run down your car battery if you have electrical accessories running while needing lots cranking to get the engine started?
1 Answer
a puzzle to think about: two weights of mass 1kg hang from strings which go over pulleys. the strings attach to two ends of a scale, which itself has negligible mass. does the scale read 0 n, 10 n, or 20 n? why?
1 Answer
A car with its hom sounding approaches a group of students. Assume the car's horn produces sound waves withconstant frequency. Which of the following statements best explains why the students hear a higher pitch as the caapproaches than when it is stopped?The sound waves incrin sneed as the car approaches the students
1 Answer
a boy throws a ball horizontally from shoulder height of 1.10m just before the ball touches down on the level ground it makes an angle of 30 degree with the ground. determine the initial velocity of the ball as it left the boys hand
1 Answer
which person is weightless? group of answer choices a child in the air as she jumps on a trampoline. an astronaut on the moon. a scuba diver exploring a deep-sea wreck.
1 Answer
PLEASE HELP, IM CONFUSED AND THIS IS A LATE ASSIGNMENT
1 Answer
define the partition function and the boltzmann factor as applied to a set of microstates each occupying defined energy levels. how is boltzmann factor used to estimate the probability of energy states being occupied
1 Answer
an emf source with a resistor with and a capacitor with are connected in series. as the capacitor charges, when the current in the resistor is 0.900 a, what is the magnitude of the charge on each plate of the capacitor?
1 Answer
If an interstellar cloud lies between Earth and a hot star, we can detect its presence in the stellar spectrum of the star. Which of the following properties of the cloud can be determined from the stellar spectrum?temperaturevelocitydensityelemental abundance
1 Answer
identify a star that is white in color a. canopus b. betelgeuse c. deneb d. aldebaran
2 Answers
i need help with the vocab for science
1 Answer
turns people upside down. people should not drop down. this is due to: gravity. inertia. seat belts. centrifugal force.
1 Answer
A Caris travelling along astraigh levels red at 20 m/s against force of 3000M What Power forms its engine is needed?
1 Answer
Calculate and compare the gravitational force and the electrical force between two protons that are separated by 1.2 x 10-15 m (G = 6.67 x 10-11 Nm2/kg2, e = 1.60 x 10-19 C, mp = 1.67 x 10-27 kg).
1 Answer
a telescope has an objective lens with a diameter of 300 mm. an eyepiece with a focal length of 10 mm is used. what is the magnification?
1 Answer
which is an alternative piece of evidence that supports the idea that solar energy could play a part in solving the energy crisis?
1 Answer