3 years ago

6. An elephant is putting 25,000 newtons of force on Leah. The elephant

Physics

1 answer:

stiv31 [10]3 years ago

8 0

Answer:
2,500 kg

Explanation:
Mass= force/acceleration
25,000/10=2,500

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An aircraft, traveling northward, lands on a runway with a speed of 77 m/s. Once it touches down, it slows to 6.3 m/s over 705 m

KengaRu [80]

Answer:

magnitude

$a = 4.18 m/s^2$

Direction

Opposite to the velocity of aircraft

Explanation:

As we know that the initial speed of the aircraft when it land on the ground is

$v_i = 77 m/s$

now the final speed of the aircraft when it covers 705 m on runway is given as

$v_f = 6.3 m/s$

so here we know that

$v_f^2 - v_i^2 = 2 a d$

so now we can say that

$6.3^2 - 77^2 = 2ad$

$6.3^2 - 77^2 = 2(a)(705)$

$a = -4.18 m/s^2$

5 0

3 years ago

You have two capacitors and want to connect them across a voltage source (battery) to store the maximum amount of energy. Should

meriva

Answer:

In parallel

Explanation:

Ctotal = C1 + C2 + ... + Cn

8 0

4 years ago

A fuse in an electric circuit is a wire that is designed to melt, and thereby open the circuit, if the current exceeds a predete

arlik [135]

Answer:

0.0389 cm

Explanation:

The current density in a conductive wire is given by

$J=\frac{I}{A}$

where

I is the current

A is the cross-sectional area of the wire

In this problem, we know that:

- The fuse melts when the current density reaches a value of

$J=520 A/cm^2$

- The maximum limit of the current in the wire must be

I = 0.62 A

Therefore, we can find the cross-sectional area that the wire should have:

$A=\frac{I}{J}=\frac{0.62}{520}=1.19\cdot 10^{-3} cm^2$

We know that the cross-sectional area can be written as

$A=\pi \frac{d^2}{4}$

where d is the diameter of the wire.

Re-arranging the equation, we find the diameter of the wire:

$d=\sqrt{\frac{4A}{\pi}}=\sqrt{\frac{4(1.19\cdot 10^{-3})}{\pi}}=0.0389 cm$

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3 years ago

How can two objects have different mass and volume yet have the same density?

natta225 [31]

Because one object can have more things in it. I learned it a t school today.

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3 years ago

A cube of an unknown element has a shiny, silvery color. The side of the cube measures 2.0 cm and the cube has a mass of 14.56 g

shepuryov [24]

Answer: beryllium

Explanation: i took the test i got it right!!

8 0

3 years ago