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Questions (19)
Store A offers a 60% discount. Store B has a sale for 2/3 off. Which store gives the greater discount? Explain.
1 answer
511 views
Consider a train that rounds a curve with a radius of 574 m at a speed of 160 km/h. Calculate the friction force on the
0 answers
1,141 views
Five friends went to a baseball game. Three of friends each bought a ticket for x dollar and soda for $6.00. The other two
1 answer
639 views
I have to create a contribution margin income statement (per unit) and need to determine how many burgers per hour I think the
1 answer
981 views
i am going a center of gravity problem, with the x=w1(x1)+w2x2..../ W1+W2..
and i keep getting the wrong answer can someone
0 answers
1,031 views
I am doing my physics homework and am stuck on this one problem. can anyone help me please?
Two blocks are connected by a
0 answers
890 views
An interior decorator is buying a fringe for the edge of a rug in the shape of a regular octagon. The side length of the rug
1 answer
690 views
4. If the rule (x, y) ¡ú (x + 3, y ¨C 3) is applied to the original triangle, give the coordinates of and draw the image.
0 answers
546 views
F=Gm1m2/d2 solve for m1
7 answers
5,092 views
What are the differences between these things?
1. substance vs. mixture 2. homogeneous vs. heterogeneous 3. solute vs. solvent 4.
4 answers
696 views
Several hypotheses may fit every set of data. what is important to know when you hear about a new scientific finding? NUmber the
9 answers
643 views
How does this ( hypotheses) study compare to scientists who study the structure of the atom or evolution?
2 answers
454 views
Name the 6 seas of the " Fertile Crescent" / Middle East?
5 answers
682 views
1 Which do you think is more effective and why?
- Gathering a lot of data or - Gathering a random sample of data? 2 How does this
0 answers
556 views
1 What is a hupotheses?
2 what further information do we need to be more certain of the hypotheses? ( give examples)
3 answers
393 views
Why do older people who do not wear glasses read books farther away from their eyes than younger people do?
1 answer
2,144 views
The images produced by a converging camera lens are upside down. Does this mean the photographs taken with the cameras are
1 answer
1,957 views
Why can't you take a photograph of your image in a plane mirror and focus the camera on both your image and on the mirror frame?
1 answer
577 views
When your eye is submerged in water, is the bending of light rays from water to your eyes more, less, or the same as in air?
1 answer
1,344 views
Answers (12)
Hi
(a) Top block: F-friction=M1a F=2.9a+(0.21*2.9*9.8) Bottom block: friction=M2a a=(0.21*2.9*9.8)/5.5 F=(0.21*2.9*9.8*2.9)/5.5+(0.21*2.9*9.8)=9.12N (b) Bottom block: F-friction=M2a F=5.5a+(0.21*2.9*9.8) Top block: 0.21*2.9*9.8=2.9a a=0.21*9.8
(a) Top block: F-friction=M1a F=2.7a+(0.21*2.7*9.8) From bottom block: friction=M2a a=(0.21*2.7*9.8)/4.7 F=(0.21*2.7*9.8*2.7)/4.7+(0.21*2.7*9.8)=8.749N (b) Bottom block: F-friction=M2a F=4.7a+(0.21*2.7*9.8) Top block: 0.21*2.7*9.8=2.7a a=0.21*9.8
thanks
The first one
thanks
i don't know ........plz help
and what about others?
hypotheses
thank u so much
Are these the seas? black , caspian, mediterranean, red, arabian and ? ( which is the last one???
thanks a lot u really helped me....can u help me with some of the questions that i have just posted
