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2 years ago

Please help me fr fr !

Physics

1 answer:

Furkat [3]2 years ago

6 0

The answer is A because it describes both toy cars

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a net force of 100 newtons is applied to a wagon for 5 seconds. This causes the wagon to undergo a change in momentum of

marin [14]

J = ft = 100N*5s = 500Ns

8 0

2 years ago

A 1.95-nC charged particle located at the origin is separated by a distance of 0.0800 m from a 3.78-nC charged particle located

lesya692 [45]

Answer:

(a) The electrostatic force on the 3.78-nC particle is $10.35 \times 10^{-6} N$ along the

positive x axis.

(b) The electrostatic force on the 1.95-nC particle is $10.35 \times 10^{-6} N$ along the

negative x axis.

Explanation:

a.) The electrostatic force on the 3.78 nC particle is

$F_1 = \frac{Q_1 \times Q_2}{4 \pi \epsilon_0 r^2} \hat{i}$ where $Q_1$ is the 1.95 nC charge at the origin, and

$Q_2$ is the 3.78 nC charge at 0.08 m from the origin

r is the distance of 0.08 between the charges

$\epsilon_{0}$ is the relative permittivity of 8.854 × $10^{-12} F/m$ .

Therefore $F_1 = \frac{1.95 \times 10^{-9} \times 3.78 \times 10^{-9}}{4 \times \pi \times 8.854 \time 10^{-12} \times (0.08)^2} = 10.35 \times 10^{-6} Newton$ in the positive x direction.

b.) The electrostatic force on the 1.95 nC particle is the same as the electrostatic force on the 3.78 nC particle except that its direction is in the negative x- axis direction.

3 0

2 years ago

A thief is trying to escape from a parking garage after completing a robbery, and the thief's car is speeding (v = 13 m/s) towar

rodikova [14]

<u>Answer</u>

Yes, the car reaches the door before the gate closes.

<u>Explanation</u>

The time taken by the car to reach at the door.

Time = distance / time

= 22/13

= 1.6923 seconds

Time taken by the door to close up to the height of the car.

Distance the door has to move to prevent the car from escaping = 9.1.4 = 7.6 m

From newton's 2nd law of motion;

s = ut + 1/2 gt²

7.6 = 0.6t + 1/2 × 10t²

7.6 = 0.6t + 5t²

50t² + 6t - 76 = 0

Solving this quadrilatic equation,

t = 28.537 seconds

Answer: Yes, the car reaches the door before the gate closes.

3 0

2 years ago

1. A block of aluminum occupies

Anvisha [2.4K]

Answer:

2700g/L

Explanation:

D=m/v

40.5g/0.015L

7 0

2 years ago

A toroid having a square cross section, 5.00 cm on a side, and an inner radius of 15.0 cm has 500 turns and carries a current of

SCORPION-xisa [38]

Answer:

a).β=0.53 $x10^{-3}$ T

a).β=0.40 $x10^{-4}$ T

Explanation:

The magnetic field at distance 'r' from the center of toroid is given by:

$\beta =\frac{u_{o}*I*N}{2\pi*r}$

a).

$N=500\\I=0.800A\\r=15cm*\frac{1m}{100cm}=0.15m\\u_{o}=4\pi x10^{-7}\frac{T*m}{A} \\\beta=\frac{4\pi x10^{-7}\frac{T*m}{A}*0.8A*500}{2\pi*0.15m} \\\beta=0.53x10^{-3}T$

b).

The distance is the radius add the cross section so:

$r_{1}=15cm+5cm\\r_{1}=20cm$

$r_{1} =20cm*\frac{1m}{100cm}=0.20m$

$\beta =\frac{u_{o}*I*N}{2\pi*r1}$

$\beta =\frac{4\pi x10^{-7}*0.80A*500 }{2\pi*0.20m} \\\beta=0.4x10^{-3} T$

3 0

2 years ago