Which of the following should be part of solving any problem in physics? Select all that apply: Read the problem carefully. Draw a picture of the situation. Write down the variables that are given. Think about which physics principles to apply. Determine which equations can be used to apply the correct physics principles. 7 Check the units when you have completed your calculation.

Reduce the following ratio to its lowest terms and to an equivalent ratio with 1 as the smallest term. 13 : 5/18 : 18 2.2 : 7.9 : 65/4 Determine the following ratios in simplest form: a. 25 minutes to 4 hours and 50 minutes b. 500 m to 3.1 km c. 600 g to 10.4 kg   What is the ratio of 12 minutes to 12 hours, reduced to its lowest terms?   Can you please answer all. Thanks

Springs 1 and 2 are identical. What is the mass of the unknown block, in kg? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement. 100 g 10 20 30 40 50 60 80 90 on

A student measures the mass of an object with a scale several times, resulting in an average mass m = 11.29 grams. Another student points out that the scale was not “zeroed”, or calibrated to read zero mass with no object on it, before the object was weighed. Without a load, the scale reads 0.08 grams. No one has used the scale since the last measurement.  c) What is the correct mass of the object?

1. Suppose that F1 = 290 N, please help solve these two problems.

UNIT VECTORS: 1. Given three vectors A = -2i + 3j + 4k, B = 3i + 1j - 3k and C = 3i -4j + 2k, do the following: a) Find the magnitude of each vector b) Write an expression for the vector sum A + B using unit vectors c) Write an expression for the vector difference A - C using unit vectors d) Find the scalar product A. B e) Find the cross product A x B f) Find the angle between A and B g) Find (Ax C). B

Fluid mechanics problem

a)Find an expression for the bullet's initial speed v_B in terms of m, M, k, and d. Express your answer in terms of the variables m M k d b)What was the speed of a 1.8 g bullet if the block's mass is 1.1 kg and if the spring, with k = 37 N/m , was compressed by 16 cm? Express your answer in meters per second. c)What percentage of the bullet's energy is "lost"? Express your answer in percent to four significant figures.

The Statue of Liberty in New York City is approximately 305 ft305 ft tall. How many U.S. dimes would be in a stack of the same height? Each dime is 1.35 mm1.35 mm thick. number of dimes:     Each dime has a mass of 2.268 g.2.268 g. How much would the stack of dimes from the previous question weigh? mass:   g What is the value, in dollars, of the same stack of dimes? value:   dollars The 2017 U.S. gross domestic product (GDP) was valued at 19,390,604,000 dollars.19,390,604,000 dollars. How many Statue of Liberty‑height stacks of dimes are needed to match the GDP in value? number of stacks:

1. In this problem, you will work out the dimensions and units of quantities from equations. This is a very useful method for checking the physical validity of equations. (a) Consider a particle whose position x is given as a function of its speed v by the following equation v = Ce¯x, where b and C are positive constants. Find the units of C and b in the S.I system. Practice Quiz1 (b) Consider a particle velocity v is given as a function of time t by the following equation, v= Aw sin(at) where A, o are positive constants. Find the units of A and in S.I units. 2. A particle is moving in a straight line. The graph denotes the velocity of the particle as a function of time. (a) Draw a graph of the acceleration of the particle as a function of time. Your graph should include the magnitude and sign of the acceleration. (b) Draw a graph of the displacement of the particle as a function of time. The particle starts from x = 0. 10 8 (s/w) A AA 2.6 -8 -10- t (sec)