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3 years ago

A velocity time graph shows how what changes over time

Physics

1 answer:

Solnce55 [7]3 years ago

5 0

Answer:

velocity

Explanation:

The name of the graph tells you what it is showing.

A velocity vs. time graph shows how velocity changes over time.

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A student had rolled 114 dice and removed all those landed on the number six. the student rolled the remaining dice again and re

allochka39001 [22]

Answer:

4 rolls

Explanation:

The probability of rolling a 6 is 1/6 = 0.1667 (4.d.p)

This means that approx. 1/6 of the dice will land on a 6.

If the student removes a 1/6 of the dice each time, it means that the number of dice is decreasing by 1/6 each roll (or multiplying by 5/6).

114/2 = 57

By multiplying 114 by 5/6 and continuing we can see how many times it takes for us to get past 57.

Roll 1: 114 x 5/6 = 95

Roll 2: 95 x 5/6 = 79.17

Roll 3: 79.17 x 5/6 = 65.97

Roll 4: 65.97 x 5/6 = 54.98

Most likely to take 4 rolls before halving the number of dice.

You could also solve this problems by writing an equation and solving using logs but I think this method is easier to understand.

Hope this helped!

8 0

3 years ago

Two point charges, q1 -25 µc and q2 +50 µc are separated by a distance of d = 12 cm. the electric field at the point p is zero.

astraxan [27]

Answer:Solution:

Q1 = -27 × 10^-6 C

Q2 = 50 × 10^-6 C

d = 13cm = 0.13 m

Let x be the distance between P and Q1. At point P, the field due to q1 ie. E1 and q2 ie. E2 are equal in magnitude but opposite in direction and hence cancel each other resulting in zero net electric field.

At P

|E1|=|E2|

kq1/x^2 = kq2/(x+d)^2

q1 (x^2+0.0169+0.26x)= q2 × x^2

27x^2 + 0.4563 + 7.02x = 50x^2

23x^2 -7.02x -0.4563 =0

x = 0.36m = 36cm

Or x= -0.055m= -5.5 cm

Note: -5.5 cm corresponds to a position of P between q1 and q2 where the net electric field is also 0.

8 0

3 years ago

Which ions are most abundant in a base?

denpristay [2]

The most abundant cation (or positively charged ion) in the extracellular fluid (ECF) is sodium (Na+). The most abundant anion (or negatively charged ion) in the ECF is chloride (Cl-). The most abundant cation in the intracellular fluid (ICF) is potassium (K+).

4 0

4 years ago

Select the correct answer,

Tresset [83]

Answer:

I'm pretty sure it's air pressure.

Explanation:

4 0

3 years ago

Scientists plan to release a space probe that will enter the atmosphere of a gaseous planet. The temperature of the gaseous plan

lianna [129]

Answer: E. 450 K

Explanation:

It is given that the temperature of the gaseous planet is linearly related with height of the atmosphere. we can write this in the mathematical equation:

y = m x +c

where y is the temperature values, x is height, m is the slope and c is the y-intercept. we have been given two sets of value in the image, using which we can find the value of slope in y-intercept.

at x = 18.40 km, y = 147.54 K

⇒147.54 = 18.40 m + c

⇒c = 147.54 - 18.40 m ..(1)

at x =78.11 km, y = 567.00 K

⇒567.00 =78.11 m + c ..(2)

Put equation 1 in 2 and solve:

⇒567.00 =78.11 m + 147.54 - 18.40 m

⇒419.46 = 59.71 m

⇒ m =419.46 ÷59.71 = 7.025 K/km

c = 147.54 - 18.40 × 7.025 = 18.28 K

At height, x = 61.5 km the approximate temperature is :

y = 7.025 K/km × 61.5 km + 18.28 K = 450.3 K

Thus, the approximate temperature at altitude 61.5 km is 450 K.

8 0

4 years ago