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3 years ago

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A 1000 kg car traveling at 70 m/s takes 3 m to stop under full braking. the same car under similar road conditions, traveling at

140 m/ s takes how long to stop under full braking?

1 answer:

Natali5045456 [20]3 years ago

4 0

Answer:

0.21 SECONDS

Explanation:

THE CAR TRAVELS AT A SPEED OF 140M/S AND A DISTANCE AS THE PREVIOUS = 3M THEREFOR S=D/T, T=D/S= 3/140= 0.12 SEC

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A rectangular dam is 101 ft long and 54 ft high. If the water is 35 ft deep, find the force of the water on the dam (the density

blsea [12.9K]

To solve this problem we will begin by finding the pressure through density and average depth. Later we will find the Force, by means of the relation of the pressure and the area.

$P = \rho h$

Here,

h = Depth average

$\rho$ = Density

Moreover,

$\text{Density of water}= \rho = 62.4lb/ft^3$

Replacing,

$P = (62.4lb/ft^3)(\frac{35}{2}ft)$

$P = 1092 lb/ft^2$

Finally the force

$\text{Force} = \text{Pressure}\times \text{Area of dam with water acting on it}$

$F = 1092lb/ft^2(101ft*52ft)$

$F = 5.735*10^6lbf$

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3 years ago

The number of significant figures in 0.060900 is

Lady bird [3.3K]

Answer:

There are <u>5</u> significant figures.

Explanation:

You must start conting your sig figs until you continue to hit zeros at the end. Those zeroes at the end are disregarded. So 0.0609 is where you get your <em>sig figs</em> from.

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3 years ago

As a dilligent physics student, you carry out physics experiments at every opportunity. At this opportunity, you carry a 1.39-m-

grin007 [14]

Answer:

The strength of magnetic field is $6.21 \times 10^{-5}$ T

Explanation:

Given:

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According to the faraday's law

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$B = 6.21 \times 10^{-5}$ T

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if object a and object b collide object a have the same momentum as it had before the collision. T or F

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The correct answer is: *False <------

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Can u read a ruler it's very hard

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Answer:

A. 1 inch

B. 1/2 inch

C. 3/4 inch

D. 1/8 inch

E. 1 7/8 inch

F. 1 1/2 inch

G. 3 1/15 inch

H. 2 5/8 inch

I. 2 1/4 inch

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3 years ago