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Lena [83]
3 years ago
13

1.a baseball hits a home run, according to Newton's laws of motion which of the following statements could be true in this scena

rio:
statement 1: the bat pushes on the ball with the same force as the ball pushes on the bat.

statement 2: Newton's 2nd law explains why the ball travels farther than the bat.

statement 3: the bat hit the ball causing the ball to change direction. this is an example of unbalanced force in Newtons first law of motion.

choose all statements that are true.

2. A bowling ball on earth weighs 11 pounds and has a mass of 5kg. The gravitational pull on the moon is 1/6 of the gravitational force on earth. what would the mass of the bowling ball be on the moon?

3.how much force would you need to use in order to accelerate an 80kg shopping cart to 0.2 m/s^2 (f=ma)?
Physics
1 answer:
Fittoniya [83]3 years ago
8 0
<h2>Answer to Q1:  </h2>

<u>The correct option is </u><u>bat pushes on the ball with the same force as the ball pushes on the bat. </u>

<h2>Explanation: </h2>

According to Newton’s law action and reaction are equal in magnitude but opposite in direction so the same case will apply here. The bat pushes on the ball with the same force as the ball pushes on the bat just the direction is opposite.

<h2>Answer to Q2 </h2>

Mass will remain the same

<h2>Explanation: </h2>

The gravitational pull is related to the weight of objects. Weight is the force with which earth attracts everything towards its centre. And mass is the quantity of matter inside the body. So on the moon the quantity of matter inside a body does not change therefore the mass would remain the same.

<h2>Answer to Q3 </h2>

Force required is 16 Newton

<h2>Explanation: </h2>

Mass= 80 kg

Acceleration = a = 0.2

So F = ma

Putting the values

F= 80 x 0.2

F = 16 N


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What is formed from at least two types of chemically combined atoms?
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A compound. For example, hydrogen and oxygen atoms form water.
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3 years ago
Estimate how far apart the rays of deepest red and deepest violet light are as they exit the bottom surface. assume nred = 1.57
Harlamova29_29 [7]
We begin by noting that the angle of incidence is the one that's taken with respect to the normal to the surface in question. In this case the angle of incidence is 30. The material is Flint Glass according to the original question. The refractive indez of air n1=1, the refractive index of red in flint glass is nred=1.57, finally for violet in the glass medium is nviolet=1.60. Snell's Law dictates:
n_1sin(\theta_1)=n_2sin(\theta_2)
Where \theta_2 differs for each wavelenght, that means violet and red will have different refractive indices in the glass.
In the second figure provided details are given on which are the angles in question, \Delta x is the distance between both rays.
\theta_{2red}=Asin(\frac{sin(30)}{1.57})\approx 18.5705
\theta_{2violet}=Asin(\frac{sin(30)}{1.60})\approx 18.21
At what distance d from the incidence normal will the beams land at the bottom?
For violet we have:
d_{violet}=h.tan(\theta_{2violet})\approx 0.0132m
For red we have:
d_{red}=h.tan(\theta_{2red})\approx 0.0134m
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6 0
3 years ago
The magnetic field strength at the north pole of a 2.0-cmcm-diameter, 8-cmcm-long Alnico magnet is 0.10 TT. To produce the same
horrorfan [7]

Answer:

2653 turns

Explanation:

We are given that

Diameter,d=2 cm

Length of magnet,l=8 cm=8\times 10^{-2} m

1m=100 cm

Magnetic field,B=0.1 T

Current,I=2.4 A

We are given that

Magnetic field of solenoid and magnetic are same and size of both solenoid and magnetic are also same.

Length of solenoid=8\times 10^{-2} m

Magnetic field of solenoid

B=\frac{\mu_0NI}{l}

Using the formula

0.1=\frac{4\pi\times 10^{-7}\times 2.4\times N}{8\times 10^{-2}}

Where \mu_0=4\pi\times 10^{-7}

N=\frac{0.1\times 8\times 10^{-2}}{4\pi\times 10^{-7}\times 2.4}=2653 turns

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Describe an example where materials are prepared as fluids so that they can be moved easily
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Answer:

In general solids are easier to transport than liquids, but the above metal example is a valid one and the only other one that comes to mind is that of concrete. It is mixed as a liquid and transported as such, but then sprayed or laid down to dry and form a solid surface or filler. 

Explanation:

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Question 2:
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Explanation:

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