Question

Scientists are expected to publish their work in public science journals, exposing it to sometimes harsh criticism from other scientists. Which of the following is not a reason for this "peer review" process? Question 1 options: A.To ensure honesty in science. B.To make results publicly available to other scientists. C.To allow other scientists to find possible mistakes in the work. D.To allow journal editors to filter out scientific results that might contradict the work of prominent scientific authorities. Suppose you push horizontally on the wall of a building, which of course doesn't move. What's the best explanation for why we say you did zero work on the building? Question 5 options: a) The building has too much mass to have any work done on it. b) The wall did not heat up measurably. c) The wall did not move through any appreciable distance. d) You did do work on the building, or your arms wouldn't be so tired! A vehicle is moving along a curve in a road at constant speed. The acceleration vector of the vehicle is pointing... Question 8 options: a. in the direction of the car's travel. b. opposite the direction of the car's travel. c. towards the inside of the curve. d. towards the outside of the curve. e. The car is not accelerating. What is the wavelength of a sound with a frequency of 200 Hz? The speed of sound is 343 m/s. Question 46 options: a) 686 m b) 1.72 m c) 0.583 m d) 200 m

Answer 1

Suppose you push horizontally on the wall of a building, which of course doesn't move. What's the best explanation for why we say you did zero work on the building?
Work done = Force * distance.
Correct Option :-
c) The wall did not move through any appreciable distance.

A vehicle is moving along a curve in a road at constant speed. The acceleration vector of the vehicle is pointing...

This is called centripetal acceleration !!
Correct option:- towards the inside of the curve

What is the wavelength of a sound with a frequency of 200 Hz? The speed of sound is 343 m/s.
We know,
v = f * λ
λ = 343/200
λ = 1.72 m

Correct option :- (b)