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3 years ago

When determining the number of significant digits in a measurement,

Physics

2 answers:

Black_prince [1.1K]3 years ago

6 0

B) All nonzero digits are significant.

myrzilka [38]3 years ago

3 0

Answer:

all nonzero digits are significant.

Explanation:

Significant digits are total number of digits that are used to define the final results.

So here we have to define as per rules

1) All non zero numbers are significant

2) All zeros between two non zero numbers are significant

3) All trailing zeros in a number without decimal are not significant

4) All zeros in a number which is greater than 1 with decimal are significant

So as per above rules correct answer will be

all nonzero digits are significant.

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A basketball with a mass of 0.5 kilograms is accelerated at 2

Paul [167]

Answer: 1N

Explanation: its not 0N.

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3 years ago

A 0.86 kg rock is projected from the edge of the top of a building with an initial velocity of 8.65 m/s at an angle 46◦ above th

Georgia [21]

Answer:

Height of the building = 11.4 m

Explanation:

As we know that the stone is projected at an angle 46 degree with speed 8.65 m/s

so the two components of the speed is given as

$v_x = 8.65 cos46$

$v_x = 6 m/s$

vertical component of the speed is given as

$v_y = 8.65 sin46$

$v_y = 6.22 m/s$

now we know that the ball strike at horizontal distance of 13.7 m

so we will have

$x = v_x t$

$13.7 = 6 t$

$t = 2.28 s$

now we know that in vertical direction ball will move under uniform gravity so we can use kinematics

$y = v_y t + \frac{1}{2}at^2$

$y = 6.22(2.28) - \frac{1}{2}(9.81)(2.28^2)$

$y = -11.4 m$

Height of the building = 11.4 m

3 0

4 years ago

Read 2 more answers

As the temperature rises the solubility of all gases in water also ______

Anastasy [175]

Answer:

As the temperature rises the solubility of all gases in water also will decrease.

Explanation:

The solubility of gases in water increase with the decrease of the temperature, and vice-versa.

The scape of the gas molecules from solution occurs by the breaks of the intermolecular bonds as a consequence of the increase of the kinetic energy which causes an increase in the motion of the gas molecules in solution.

That is why as the temperature rises the solubility of all gases in water also will decrease.

I hope it helps you!

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4 years ago

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If a device uses 280 watts of power a day, about how many kilowatt-hours will it use in 30 days?

kvasek [131]

Given: 280 watts power a day

Unknown: KwH=?in 30 days
Solution: 280 watt-hours per day/1000x30 days
.28 x 30=n
Answer:8.4 kwh

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4 years ago

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Define the focus of a concave lens

Sophie [7]

Answer:

Principal focus of concave lens - 

★ The point at which rays parallel to principal axis coming from infinity appear to converge after being refracted from concave lens is called the principal focus of concave lens.

________________________

• Additional information - 

★ Principal focus - A number of rays parallel to the principal axis after reflection from a concave mirror meet at a point on the principal axis or appear to come from a point after reflection from a convex mirror on the principal axis. This is called principal focus.

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3 years ago