Anyone can help me solve 2 of those problems
A man lifts a box of books that weigh 185N. The box is lifted 0.80m. How much work does the student do on the box?
A thermometer can measure temperature to the nearest enth of a degree. Which of the following readings gives the temperature to the accuracy of the thermometer?
a) 67.43
b) 67
c) 6.743x10^1
d) 67.4
e) None of these
The man exerts a force of 185 Newtons up.
The box moves .8 meters up
The work done = .8*185 newton meters which is called Joules
Only d is to a tenth of a degree.
A is to a hundredth
B is to a whole degree
C is to a hundredth (It is really the same a A)
thanks a lot
Sure, I can help you solve those problems! Let's start with the first one:
Problem 1:
To find the work done by the student on the box, we can use the formula:
Work = Force × Distance
Given:
Force = 185 N
Distance = 0.80 m
To calculate the work done, simply multiply the force by the distance:
Work = 185 N × 0.80 m
Work = 148 N·m
Therefore, the student does 148 joules (J) of work on the box.
Now let's move on to the second problem:
Problem 2:
To determine the reading that gives the temperature to the accuracy of the thermometer, we need to consider the level of precision required.
Given:
The thermometer can measure temperature to the nearest tenth of a degree.
Among the given options:
a) 67.43
b) 67
c) 6.743 × 10^1
d) 67.4
Option d) 67.4 is the most accurate reading since it has a tenths place (the digit after the decimal point). This reading aligns with the precision of the thermometer, which is to the nearest tenth of a degree.
Therefore, the answer is option d) 67.4.