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yuradex [85]
3 years ago
5

How many significant figures are in 0.0067?

Physics
1 answer:
larisa [96]3 years ago
3 0

Answer:

2

Explanation:

there are 2 significant figures in there

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Which of the following forms of energy must an object have if it is moving at a constant velocity?
lbvjy [14]

Answer:

Kinetic energy

Explanation:

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3 years ago
What is the resistance of a bulb of 40w connected in a line of 70v​
olga55 [171]

Answer:

122.5 ohm

Explanation:

Given :

P=40 w

V= 70 V

R=?

Resistance can be calculated as :

P=\frac{V^{2} }{R} \\40=\frac{(70)^{2} }{R}\\40=\frac{4900}{R} \\R=\frac{4900}{40} \\R=122.5 ohm

Therefore, resistance of the bulb will be 122.5 ohm

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3 years ago
Is it more beneficial to utilize renewable or non renewable resources and why ?
Svetlanka [38]

Answer: it is better to use renewable energy. Some of the benefits are: The main advantage is the practically zero emission of greenhouse gases (GHG) and other pollutants that affect climate change.

  They help decrease pollution-related illnesses.

  It does not need large amounts of water for its operation.

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3 years ago
The most practical way to guard against allergic reactions in restaurants guests is to
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Read the ingredients on the menu carefully and ask the waitress if theres any other ingredients you should know about
8 0
4 years ago
A bullet is fired from a rifle that is held 3.00 m above the ground in a horizontal position. The initial speed of the bullet is
zloy xaker [14]

Answer: a) 0.78 s; b) 899.83 m; c) Δx=1150*Δt

Explanation: In order to solve this problem we have to use the kinematic equations for the independent two axis (x-y). The following expressions are:

y=yo+voy-(g*t^2)/2 g is 9.8 the aceletarion of the gravity on the y axis

vfy=voy-g*t

x=xo+vox+(a*t^2)/2   a=o there is not acceleration in the x axis.

vfx=vox+a*t

voy and vox ara the initial velocities for each axis.

yo and xo are the initial positions of teh bullet.

From these equations we can obtain the time

y=0=3-(g*t^2)/2

t^2=3*2/g

t=\sqrt{6/g}

t= 0.78 s

To calculate xf= voy*t= 1150 * 0.78= 899.83 m

Finally considering with the last equation we ontain  the error in Δx

in the form:

Δx=1150*Δt  since is linear the dependance with time.

7 0
3 years ago
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