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2 years ago

PLEASE HELP DUE TODAY!!

Physics

1 answer:

77julia77 [94]2 years ago

3 0

Answer:

1. −1.10400000*10^−17

2.5,750

3. 27 electrons = −4.32000000*10^−18

4. Don't remember how to do

5) Same, don't remember how to do

Explanation:

Hope this at least helped

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Jorge tightens a bolt on his bicycle with a wrench that is 0.20 m long. If he pulls perpendicularly on the end of the wrench wit

Andreas93 [3]

Answer:

28Nm

Explanation:

Torque is expressed as the prduct of force and radius

Given

Force = 140N

radius = 0.20m

Torque = 140 * 0.2

Torque = 140 * 1/5

Torque = 28Nm

Hence the amouunt of torque applied is 28Nm

8 0

3 years ago

What would be the speed of the boxes when box b has fallen a distance of 0.50 m? The coefficient of kinetic friction between box

bija089 [108]

The given question is incomplete. The complete question is as follows.

Boxes A and B in the figure have masses of 13.4 kg. and 4.8 kg. , respectively. The two boxes are released from rest. What would be the speed of the boxes when box b has fallen a distance of 0.50 m? The coefficient of kinetic friction between box a and the surface it slides on is 0.20. Use conservation of energy.

Explanation:

Let us assume that box B is falling down, so equation of force for box B is as follows.

$m_{B}g - T = m_{B}a$

T = $m_{B}g - m_{B}a$ .......... (1)

Now, force of equation for box A is as follows.

$T - f_{k, A} = m_{A}a$

$T - \mu_{k}m_{A}g = ma$

T = $\mu_{k}m_{A}g + m_{A}a$ ........... (2)

We will equate both equation (1) and (2) as follows.

$m_{B}g - m_{B}a$ = $\mu_{k}m_{A}g + m_{A}a$

$m_{B}g - m_{B}a = \mu_{k}m_{A}g + m_{A}a$

$m_{B}g - \mu_{k}m_{A}g = a(m_{A} + m_{B})$

a = $\frac{4.8 kg - (0.20)(13.4 kg)}{13.4 kg + 4.8 kg} \times 9.8 m/s^{2}$

= 1.1415 $m/s^{2}$

Now, we will calculate the velocity of the box after falling through a distance of 0.50 m as follows.

$v_{B} = \sqrt{2aS}$

= $\sqrt{(2 \times 1.1415 \times 0.50)}$

= 1.07 m/s

Thus, we can conclude that speed of the given boxes is 1.07 m/s.

5 0

3 years ago

Can anyone help me out with this question please? It has to be right thanks so much

Vladimir79 [104]

it is basalt which is an igneous rock

8 0

3 years ago

Dwight pulls his sister in her wagon with a force of 65 N at an angle of 50.0º to the ground. What are the magnitudes of the hor

NeTakaya

Refer to the diagram shown.

F = 65 N, the force exerted by Dwight.

The horizontal component of the force is
65 cos(50°) = 41.8 N
The vertical component of the force is
65 sin(50°) = 49.8 N

Answer:
Horizontal: 41.8 N
Vertical: 49.8 N

3 0

3 years ago

An unknown number of identical light bulbs are connected to a 15 V battery in parallel. The current through the battery is 2 A.

zaharov [31]

Answer:

An unknown number of identical light bulbs are connected to a 15 V battery in parallel. The current through the battery is 2 A. If the light bulbs are connected to the battery in series, the current through the battery is 5 mA. How many bulbs are there?

3 bulbs are there from the analogy given above

Explanation:

7 0

3 years ago