All categories

2 years ago

Scientists can help us understand the impact of human activities on the environment. True or false?

Physics

1 answer:

zhannawk [14.2K]2 years ago

5 0

Answer:

True

Explanation:

hope it will help you

You might be interested in

We move a square loop of wire 2.3 cm on a side into a region of uniform magnetic field of 1.5 T with the plane of the loop perpe

vova2212 [387]

Answer:

Force will be $F=8.33\times 10^{-4}N$

Explanation:

We have given side of wire d = 2.3 cm = 0.023 m

Magnetic field B = 1.5 T

Velocity v = 2.1 m/sec

Resistance R = 3 ohm

We know that current is given by $i=\frac{Bvd}{R}=\frac{1.5\times 2.1\times 0.023}{3}=0.02415A$

Power is given by $P=i^2R=0.02415^2\times 3=0.00174watt$

We know that power is also given by $P=Fv$

So $0.00174=F\times 2.1$

$F=8.33\times 10^{-4}N$

4 0

2 years ago

Consider a thin circular disk that has been heated up to 400 °C and then left inside a chamber to cool down. The chamber surface

kogti [31]

Answer:

hello your question lacks the required diagram attached below is the complete question with the required diagram

answer : Qtotal = 807.4 Mw

Explanation:

Given Data :

disk properties :

∈ = 0.65

D = 200 mm

Ts = 400⁰c

attached below is the detailed solution

The total rate of Heat transferred from the disk

Qtotal = 807.4 Mw

7 0

3 years ago

A single circular loop of wire of radius 0.45 m carries a constant current of 2.4 A. The loop may be rotated about an axis that

Snowcat [4.5K]

Answer:

The magnitude of the uniform magnetic field exerting this torque on the loop is 1.67 T

Explanation:

Given;

radius of the wire, r = 0.45 m

current on the loop, I = 2.4 A

angle of inclination, θ = 36⁰

torque on the coil, τ = 1.5 N.m

The torque on the coil is given by;

τ = NIBAsinθ

where;

B is the magnetic field

Area of the loop is given by;

A = πr² = π(0.45)² = 0.636 m

τ = NIBAsinθ

1.5 = (1 x 2.4 x 0.636 x sin36)B

1.5 = 0.8972B

B = 1.5 / 0.8972

B = 1.67 T

Therefore, the magnitude of the uniform magnetic field exerting this torque on the loop is 1.67 T

8 0

3 years ago

I’ll give brainliest and 10 points

leonid [27]

Answer:

what's these its D okkkk

7 0

3 years ago

When object goes under acceleration

lidiya [134]

when object goes under acceleration

c).its velocity always increases

<h3>Additional information:-</h3>

★ Acceleration: Rate of increase in velocity.

★ Velocity: Distance travelled by a body per unit time in given direction is called velocity .

6 0

3 years ago

Read 2 more answers