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stira [4]
3 years ago
7

Sam lifted his backpack with 5 Newtons of force a total of 400

Physics
1 answer:
irga5000 [103]3 years ago
4 0

2000joules

Explanation:

work done=force×meters

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Crest : trough :: compression : _____ A. frequency B. amplitude C. rarefaction D. wavelength
9966 [12]
Rarefraction.

Crest- tallest spot on transverse wave.

Trough- shortest point on transverse wave.

Compression - spot on a compressional wave where the waves are closer together.

Rarefraction - spot on a compressional wave where the waves are farther apart.
3 0
3 years ago
A bug is moving along a meter stick in the negative direction at a constant speed of 0.85cm/s. After 42 seconds have passed the
Agata [3.3K]

Given that,

bug speed, v= 0.85 m/s

time, t =42 s

Final position of bug on meter stick was 27 cm

Starting position of bug on meter stick = ?

Since we know that,

s = vt

s= 0.85*42 = 35.7 cm

this is the distance covered by bug in the given time and velocity.

since the bug is moving in negative direction, starting point will be:

27.0 cm+ 35.7 cm = 62.7 cm

The bugs starting position on meter stick was 62.7 cm.

3 0
3 years ago
4.
Nezavi [6.7K]

The density of an object remains same irrespective of its shape, size and quantity.

Explanation:

Density is an intensive property. This means that regardless of the object's shape, size, or quantity, the density of that substance will always be the same. Even if you cut the object into a million pieces, they would still each have the same density. It is because density in an intensive property of matter.

please mark brainliest

7 0
3 years ago
You are travelling by skateboard at 3.0 m/s and start to accelerate. If you
vovangra [49]

Answer: 8m/s

Explanation:

Vs= 3 m/s

Vf=?

a=0.5m/s²

t=10s

-----------

a=Vf-Vs/t

at=Vf-Vs

0.5*10s=Vf-Vs

5m/s=Vf-3m/s

5m/s+3m/s=Vf

Vf=8m/s

6 0
3 years ago
I need help with question 26<br>this is from my physics textbook
Neko [114]

Suppose a,b,c are measured in meters. Then the semiperimeter s=\dfrac{a+b+c}2 is also given in meters, so s-a,s-b,s-c are all also given in meters. When multiplied together, (s-a)(s-b)(s-c) is measured in cubic meters. Divide this by s, measured in meters, and this reduces to square meters. Take the square root and you end up back with meters once again. So the formula is indeed dimensionally consistent.

6 0
4 years ago
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