Answer:

**Answer:**

Emf induced in the loop is 0.02V

**Explanation:**

To get the emf of induced loop, we have to use faraday's law

ε = - dΦ/dt

To get the flux, we use;

Φ = BA cos(θ)

B = The uniform magnetic field

A = Area of rectangular loop

θ = angle between magnetic field and normal to the plane of loop

substitute the flux equation (Φ) into the faraday's equation

we have ε = - d(BA cos(θ)) / dt

ε = BA sinθ dθ/dt

from the question;B = 0.18T, A=0.15m2, θ = π/2 ,dθ/dt = 0.75rad/s

Our equation will now look like this;

ε = (0.18T) (0.15m2) (sin(π/2)) (0.75rad/s)

ε = 0.02V

The electric field just above the surface of the charged drum of a photocopying machine has a magnitude E of 2.5 × 105 N/C. What is the surface charge density on the drum, assuming that the drum is a conductor?

A fish swims 10 cm from the front wall of an aquarium that is 35cm wide. The front wall of the aquarium is glass with negligible thickness, but the back wall is a plane mirror. A person looks through the front wall and watches both the fish and its reflection in the mirror.Part A:What is the apparent distance from the front wall of the aquarium to the fish?Part B: What is the apparent distance from the front wall of the aquarium to the image of the fish in the mirror?

An electron is moving through an (almost) empty universe at a speed of 628 km,/s toward the only other object in the universe — an insulating sphere with a diameter of 4 m and charge density 3nC/m2 on its outside surface. The sphere "captures" the electron, which falls into a circular orbit. Required:Find the radius and period of the orbit.

In a warehouse, the workers sometimes slide boxes along the floor to move them. Two boxes were sliding toward each other and crashed. The crash caused both boxes to change speed. Based on the information in the diagram, which statement is correct? In your answer, explain what the forces were like and why the boxes changed speed.Box 1 has more mass than Box 2.Box 1 and Box 2 are the same mass.Box 1 has less mass than Box 2.**YOU MUST BE DESCRIPTIVE! Any short answers not explaining it wont get brainliest!**

A ball with a mass of 170 g which contains 3.80×108 excess electrons is dropped into a vertical shaft with a height of 145 m . At the bottom of the shaft, the ball suddenly enters a uniform horizontal magnetic field that has a magnitude of 0.250 T and direction from east to west.A)If air resistance is negligibly small, find the magnitude of the force that this magnetic field exerts on the ball just as it enters the field.Use 1.602×10−19 C for the magnitude of the charge on an electron.B)Find the direction of the force that this magnetic field exerts on the ball just as it enters the field.a-from north to southb-from south to north

A fish swims 10 cm from the front wall of an aquarium that is 35cm wide. The front wall of the aquarium is glass with negligible thickness, but the back wall is a plane mirror. A person looks through the front wall and watches both the fish and its reflection in the mirror.Part A:What is the apparent distance from the front wall of the aquarium to the fish?Part B: What is the apparent distance from the front wall of the aquarium to the image of the fish in the mirror?

An electron is moving through an (almost) empty universe at a speed of 628 km,/s toward the only other object in the universe — an insulating sphere with a diameter of 4 m and charge density 3nC/m2 on its outside surface. The sphere "captures" the electron, which falls into a circular orbit. Required:Find the radius and period of the orbit.

In a warehouse, the workers sometimes slide boxes along the floor to move them. Two boxes were sliding toward each other and crashed. The crash caused both boxes to change speed. Based on the information in the diagram, which statement is correct? In your answer, explain what the forces were like and why the boxes changed speed.Box 1 has more mass than Box 2.Box 1 and Box 2 are the same mass.Box 1 has less mass than Box 2.**YOU MUST BE DESCRIPTIVE! Any short answers not explaining it wont get brainliest!**

A ball with a mass of 170 g which contains 3.80×108 excess electrons is dropped into a vertical shaft with a height of 145 m . At the bottom of the shaft, the ball suddenly enters a uniform horizontal magnetic field that has a magnitude of 0.250 T and direction from east to west.A)If air resistance is negligibly small, find the magnitude of the force that this magnetic field exerts on the ball just as it enters the field.Use 1.602×10−19 C for the magnitude of the charge on an electron.B)Find the direction of the force that this magnetic field exerts on the ball just as it enters the field.a-from north to southb-from south to north

**Answer: representative sample**

**Explanation:**

A representative sample can be defined as a subset of the population. This sample includes subgroups that reflect the features of the larger group and are chosen for a specific purpose of study. For example, a classroom with 60 students having 30 females and 30 males, can generate a representative sample based on the gender differences.

Given the same** initial linear speed**, a solid ball, solid disk, and hoop will expend energy on both rotation and translation. The solid ball, having the lowest moment of inertia, uses the most energy for translation and, therefore, will travel the highest up an incline.

In the context of this problem related to physics, the deciding factor is the distribution of mass, which influences each object's moment of inertia. Objects set to roll tend to use energy in two ways: translation (moving along the incline) and rotation (spinning about their center).** Moment of inertia** essentially measures how much of the object's energy goes towards rotation.

For a solid ball, solid disk, and hoop with the same mass and radius, the hoop has the highest moment of inertia with all of its mass at the maximum distance from the center. Followed by the solid disk, with its mass spread evenly from the center to its edge. Lastly, the solid ball has the lowest moment of inertia as its mass is concentrated towards the center.

This means that, given the same initial **linear speed**, the hoop will expend most of its energy on rotation rather than moving up the incline (translation). The solid disk will have a more balanced distribution between translation and rotation, and finally, the solid ball will use the least amount of energy on rotation and the most on translation. As such, the solid ball will go the farthest up the incline.

#SPJ3

**Answer:**

It will take 33 seconds to stop the car.

**Explanation:**

Using the first equation of kinematics we have

where

'v' is final speed of object

'u' is initial speed of object

'a' is acceleration of object

't' is time of acceleration of object

Now since it is given that since acceleration is negative and

We know that the object will stop when it's velocity reduces to zero hence in the equation above setting v = 0 we get

45 N

450 N

450 kg

10N

**Answer:**

450N

**Explanation:**

weight= m*g

weight=45*10

weight=450N

**Answer:**

The image formed by a convex mirror will always have its smaller than the size of the object no matter what the position of the object.

**Explanation:**

The image formed by a convex mirror will always have its smaller than the size of the object no matter what the position of the object.

Also notice that convex mirror always makes virtual images.

Another feature of the convex mirror is that an upright image is always formed by the convex mirror.

An important mirror formula to remember which is applicable for both convex and mirrors

- 1/f= 1/u + 1/v

Here:

'u' is an object which gets placed in front of a spherical mirror of focal

length 'f' and image 'u' is formed by the mirror.

**Answer:**

right side up

**Explanation:**

**Answer:**

**Explanation:**

Given:

- initial speed of car and motorcycle,

- initial distance between the car and motorcycle,

- time after which the motorcycle starts to accelerate,

- rate of acceleration of motorcycle,

The initially the relative velocity of the motorcycle is zero with respect to car.

__Now using the equation of motion in the relative quantities:__

here:

relative distance of motorcycle with respect to the car

initial relative velocity of the motorcycle with respect to the car

time taken to cover the distance gap from the car.