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SSSSS [86.1K]
2 years ago
14

Using the rules for significant figures, what do you get when you multiply 67.6 by 1.2?

Physics
2 answers:
Natali [406]2 years ago
5 0

Answer:

B. 81

Explanation:

Answer: = 81  (real number)

Answer:= 8.1 × 101   ( In scientific notation)

Answer:= 8.1e1  (scientific e notation)

Rule: All the number before the power of 10 are considered as significant figures.

number of significant figures: 2

Paul [167]2 years ago
3 0

Answer:

B. 81

Explanation:

When you multiply two numbers, round the answer to the least number of significant figures available.  67.6 has three significant figures, and 1.2 has two significant figures.  So we round to two significant figures.

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A friend claims that there are just two forms of energy: kinetic energy and gravitational potential energy. What is wrong with y
Oksanka [162]

Answer:

D

Explanation:

There is a variety of many types of energies. Some of which are mechanical, thermal, electromagnetic, nuclear, chemical, sonic, and more.

7 0
3 years ago
A ray of light travels across a liquid-to-glass interface. if the indices of refraction for the liquid and glass are, respective
prisoha [69]
When it comes to optics, Snell's law is the basic formula to be used. If you notice, when light hits the water, the light does not travel in the same direction. After, it hits the water, it changes in angle. Light becomes refracted. This is observed when your hands tend to become bigger if you place it underwater. The formula for Snell's Law is

n₁ sin θ₁ = n₂sin θ₂, where n is the index of refraction. This depends on the type of medium. For example, for air, n=1. The parameters θ₁ is the angle of incidence, and θ₂ is the angle of refraction. Critical angle is the incident angle needed so that the refract angle is 90°. So, modifying the equation:

n₁ sin θcrit = n₂sin 90°, since sin 90°=1,
sin θcrit = n₂/n₁
θcrit = sin ⁻¹ (n₂/n₁)

Since liquid comes first before glass, n₁=1.75 and n₂=1.52. Substituting,
θcrit = sin ⁻¹ (1.52/1.75)
θcrit = 60.29°

7 0
3 years ago
When a object slows down what direction is the force going?
trapecia [35]

Answer: when a object gets slowed down, it's force is either going into friction and drag, if it's on the ground, and weight+drag+friction, if it's in the air.

Explanation:

7 0
3 years ago
HELP PLEASE ASAP
CaHeK987 [17]
The answer is most likely A
7 0
3 years ago
Read 2 more answers
A bungee jumper feels weightless as she falls toward the earth.what accounts for her weightless feeling when she fall freely?1.
Ann [662]

The feel of weight comes due to the normal reaction force given by the support. Hence, the condition of weightlessness is when the normal reaction force becomes zero. So, during free fall there is no support which can provide the normal reaction. Hence, the bungee jumper feels weightless as she falls towards the earth because of the lack of support force that balances gravity.

Hence, the answer is 3.

8 0
3 years ago
Read 2 more answers
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