All categories

4 years ago

Read each scenario below. Then select the answer that best completes each sentence.

Physics

2 answers:

mixas84 [53]4 years ago

8 0

Answer:

Car engine

1. More than

2. Less

Raul microwave

1. Less than

2. More

Explanation:

just answered the question

Pavel [41]4 years ago

7 0

Answer:

The power used by raul's microwave must be the power used by katrina's because his microwave took time to do the same amount of work.

Explanation:

The power from a car engine is the power of a bicycle because a car engine does the same amount of work in time. raul and katrina equally shared a frozen lunch but heated each portion in two different microwaves. katrina's lunch was warm in one minute while raul's lunch took two minutes. the power used by raul's microwave must be the power used by katrina's because his microwave took time to do the same amount of work.

You might be interested in

A student says that a speed of 50 m/s is faster than a speed of 140 km/h because the number is bigger. What would you say to the

denis23 [38]

Yes you are right but sometimes just because a number is bigger doesnt always make it so.

5 0

3 years ago

SOMEBODY PLEASE HELP!! 20 PTS!!!

aliya0001 [1]

Answer:

1. Reflection

2. travel from one medium to another

3. Same waves to travel in opposite direction.

Explanation:

1. When a wave strikes a solid barrier, it bounces back in the same medium. This wave behavior of bouncing back is known as reflection. Its like a basketball hitting a backboard. The ball bounces back at the same angle as it was incident. ∠i = ∠r

2. For refraction to occur in a wave, the wave must travel from one medium to another. When light travels from through mediums of different optical densities, it bends. The wave bends away normal when it enters from denser medium to rarer medium. The wave bends towards the normal when it enters from rarer to denser medium. The angle of refraction and angle of incidence are related by Snell's law.

$\frac{sin(i)}{sin(r)} = \frac{\mu_2}{\mu_1}$

3. The formation of standing wave requires two same waves to travel in the opposite direction and interfere. The incident wave and reflected wave when interfere, form standing waves. There waves are also resonances or harmonics. A standing wave oscillates at one place and does not transfers any energy.

3 0

3 years ago

Read 2 more answers

People have proposed driving motors with the earth's magnetic field. This is possible in principle, but the small field means th

Whitepunk [10]

Answer:

Current needed = 704A

Explanation:

Using the fomula; torque(τ) = (I)(A)(B)Sinθ

Where B = uniform magnetic field

I = current and A = Area

Diameter = 19cm = 0.19m so, radius = 0.19/2 = 0.095m

Area(A) = πr^(2) = πr^(2)

= π(0.095)^(2) = 0.0284 m^(2)

Now, B(earth)= 5x10^-5 T

While, we can ignore the angle because it's insignificant since the angle of the wire is oriented for maximum torque in the earth's field.

Now, if we arrange the formula to solve for charge (I):

I = (τ)/(A)(B)

I = (1.0x10^-3) / (0.0284)(5x10^-5)

I = 704A

6 0

3 years ago

46 POINTS will mark brainliest if correct

Mazyrski [523]

46 POINTS will mark brainliest if correct

The radius of Mercury's orbit is r = 5.79 x 1010 m and its orbital period is T=88 days. What is the

magnitude of the orbital velocity for the planet around the sun, assuming a circular orbit?

A.7.21 x 103 m/s

B.8.45* 104 m/s

C.4.79 x 104 m/s

D.5.32 x 104 m/s

5 0

4 years ago

Read 2 more answers

Starting from rest, a rocket accelerates at 20 m/s². How far will it travel in the first 4

guajiro [1.7K]

Answer:

80m

Explanation:

using

S=ut+1/2at².

u=0

t=4s

v=20 m/s².

s=0Xt+1/2x10x4².

S=5x16

=80m

3 0

3 years ago